PM60A, PM60C, PM60CH

PM61A, PM61C, PM61CH

Field Service Fiber Optic Power Meter

User Guide
Field Service Fiber Optic Power Meter

Table of Contents
Chapter 1 Introduction ............................................................................................................... 1

1.4.1 Specifications ...................................................................................................................................................... 1

1.4.2 Main Features ..................................................................................................................................................... 3
1.4.3 Mechanical Drawings .......................................................................................................................................... 4

Chapter 2 Safety ......................................................................................................................... 9

Chapter 3 Installation ............................................................................................................... 10

Chapter 4 Operation ................................................................................................................. 11

4.2.1 Button States ..................................................................................................................................................... 12

4.2.2 Navigating Measurement Screens..................................................................................................................... 13
4.2.3 Navigating the Footer Menu ............................................................................................................................. 13
4.2.4 Screen Lock ....................................................................................................................................................... 13
4.2.5 Screenshot Function .......................................................................................................................................... 13

4.3.1 Users (PM61 Series only)................................................................................................................................... 14

4.3.2 Application ........................................................................................................................................................ 15
4.3.3 Personalization .................................................................................................................................................. 16
4.3.4 Visual Fault Locator (PM61 Series Only)............................................................................................................ 17
4.3.5 Connectivity ...................................................................................................................................................... 17
4.3.6 Information ....................................................................................................................................................... 18

4.4.1 User Management (PM61 Series Only) ............................................................................................................. 18

4.4.2 Measurement Application and Option Settings ................................................................................................ 19
4.4.3 Visual Fault Locator (PM61 Series Only)............................................................................................................ 19
Field Service Fiber Optic Power Meter

4.4.4 Connectivity ...................................................................................................................................................... 19

4.4.5 Device Management ......................................................................................................................................... 20
4.4.6 Measurement View ........................................................................................................................................... 20
4.4.7 Pass / Fail Analysis (PM61 Series Only) ............................................................................................................. 21
4.4.8 Logging and Statistics ........................................................................................................................................ 21

4.6.1 CW Mode .......................................................................................................................................................... 23

4.6.2 Peak and Top Mode .......................................................................................................................................... 24
4.6.3 Visual Fault Locator (PM61 Series Only)............................................................................................................ 25

4.7.1 Data Logging ...................................................................................................................................................... 25

4.7.2 Statistics ............................................................................................................................................................ 26

4.10.1 USB 2.0 Interface ............................................................................................................................................... 29

4.10.2 Bluetooth Interface (PM61 Series Only)............................................................................................................ 30

Chapter 5 Maintenance and Cleaning........................................................................................ 30

Chapter 6 Troubleshooting and Repair ...................................................................................... 34

Chapter 7 Disposal .................................................................................................................... 35
Chapter 8 Thorlabs Worldwide Contacts ................................................................................... 36
Field Service Fiber Optic Power Meter Chapter 1 Introduction

Chapter 1 Introduction
Intended Use
The PM60 and PM61 series devices are designed for laboratory and field service use to measure the optical power
from fiber light sources. The devices may not be used or integrated into equipment that is applied in
pharmaceutical, medical, or military applications.
The product may only be used in accordance with the instructions described in this manual. Any other use will
invalidate the warranty.

Explanation of Safety Warnings

Warning indicates a hazard with a medium level of risk that, if not avoided, could result in
death or severe injury.
Indicates information considered important, but not hazard-related, such as damage to the
product.

Laser Radiation Warning

The CE marking on the product is the manufacturer's declaration that the product complies with the
essential requirements of the relevant European health, safety, and environmental protection legislation.

The symbol on the product, the accessories or packaging indicates that this device must not be treated as
unsorted municipal waste but must be collected separately.

Description
The PM60 and PM61 Series Fiber Optic Power Meters are simple to use, fast tools that allow power measurements
of optical signals and signal power trends. They also feature convenient data storage and remote connectivity.
Each unit contains a long-lasting rechargeable battery which can be recharged via a USB-C connector or wirelessly
through a built-in inductive charging coil (PM61 series only), ensuring the power meter can be operated
continuously throughout an extended workday.
The compact size and rugged design of the PM60 and PM61 series power meters makes them ideal for laboratory
and field use. Each unit comes with a 2.5 mm ferrule adapter to connect to the most commonly used fiber tips,
such as FC or SC. Thorlabs also offers additional adapters for different fiber connectors.
The PM61 series has additional features like the built-in visual fault locator that emits light in three different
modes to trace fibers and identify breaks. It further comes with Bluetooth connectivity and a wireless charging
coil.

Technical Data

1.4.1 Specifications
All technical data are valid at 23 ± 5 °C and 45 ± 15% relative humidity (non-condensing).

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Field Service Fiber Optic Power Meter Chapter 1 Introduction

Item # PM60A, PM61A PM60C, PM61C PM60CH, PM61CH

Sensor Specifications
-65 dBm to 16 dBm -70 dBm to 13 dBm -55 dBm to 23 dBm
Optical Power Range
(300 pW to 40 mW) (100 pW to 20 mW) (3 nW to 200 mW)
Spectral Range 400 - 1100 nm 800 - 1700 nm
Detector Type Silicon InGaAs
Sensor Size 3.6 mm x 3.6 mm Ø3 mm
SM05 Thread (0.535”-40) for Fiber Adapters
Aperture Thread
2.5 mm Ferrule Adapter Included (Item # PM20-25)
Measurement Uncertainty ±0.25 dB
Measurement Standard NIST / PTB Traceable
General Device Specifications
Display Type 2.8” IPS with Capacitive Touchscreen
Power Ranges 21 Current Ranges from 2 nA to 10 mA, Represented in Watts
Resolution 16 bits
Sample Rate Up to 100 kS/s via USB
Power Units dBm, dB, pW, nW, µW, mW, W
Dimensions (H x W x D) 136.0 mm x 79.0 mm x 33.4 mm
Weight 0.25 kg
Operating Temperature 5 °C to 40 °C
Storage Temperature -20 °C to 70 °C
Power Management
Battery Operation Internal LiPo, 2300 mAh, 3.7 W
Charger USB C, Inductive Charging Coil (PM61 Series Only), 5 W
Remote Operation
USB 2.0 with USB Type C connector
Interface
Bluetooth Low Energy (PM61 Series Only)
Data Storage
Internal Memory eMMC (≥ 4 GB), Accessible via USB C
Visual Fault Locator (PM61 Series Only)
Wavelength 650 nm
Output Power ≤1 mW (Class 2 Laser)
Operation CW, Flashing: 1 Hz, 3 Hz
Connector 2.5 mm Ferrule

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Field Service Fiber Optic Power Meter Chapter 1 Introduction

1.4.2 Main Features

Features PM60 Series PM61 Series

2.8” IPS Color Display  
Capacitive Touchscreen  
Physical Control Buttons  
Rubber Protection and Foldable Stand  
Rechargeable Battery  
Fast Charging via USB-C Connector  
Embedded Wireless Charging Coil  
Data Storage to Internal Flash Memory  
Internal Flash Memory Access via USB  
Pass / Fail Analysis  
Admin / User Levels  
Physical Menu Button Configuration  
Visual Fault Locator (VFL)  
USB 2.0 Full Speed Interface  
Bluetooth Low Energy Connectivity  
Compatible with “OPM” Remote Software  
Firmware Updates via USB  

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Field Service Fiber Optic Power Meter Chapter 1 Introduction

1.4.3 Mechanical Drawings

Figure 1 PM60 Series Mechanical Drawing

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Field Service Fiber Optic Power Meter Chapter 1 Introduction

Figure 2 PM61 Series Mechanical Drawing

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Field Service Fiber Optic Power Meter Chapter 1 Introduction

Components

VFL (PM61 series only) Detector Port

Touchscreen Display

Power (on/off) Button Menu Button

Control Pad

Eyelet for Hand Strap

Figure 3 PM60 and PM61 Series Front Panel

Charging LED
USB 2.0 Type-C
Connector

Fold-out Stand

Figure 4 PM60 and PM61 Series Side Panel

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Field Service Fiber Optic Power Meter Chapter 1 Introduction

Simplified Declaration of Conformity

Hereby, Thorlabs declares that the radio equipment type u-Blox NINA-B112 is in compliance with Directive
2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address:
Fiber Optic Power Meters with Internal Sensor (thorlabs.com)

FCC Designation
Class B FCC Designation:
The following statement applies to the products covered in this manual, unless otherwise specified herein. The
statement for other products will appear in the respective accompanying documentation

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures: Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Users that change or modify the product described in this manual in a way not expressly approved by Thorlabs
(party responsible for compliance) could void the user’s authority to operate the equipment.
Thorlabs is not responsible for any radio television interference caused by modifications of this equipment or
the substitution or attachment of connecting cables and equipment other than those specified by Thorlabs. The
correction of interference caused by such unauthorized modification, substitution or attachment will be the
responsibility of the user.
The use of shielded I/O cables is required when connecting this equipment to all optional peripheral or host
devices. Failure to do so may violate FCC and ICES rules.
This product has been tested and found to comply with the limits according to IEC 61326-1 for using connection
cables shorter than 3 meters (9.8 feet).

General Wireless Compliance Related Information

The PM61 series devices have an internal radio module with an integrated antenna to which the following
information applies:
This product does not contain any wireless user serviceable components. Any unauthorized product changes or
modifications will invalidate warranty and all applicable regulatory certifications and approvals.
The module used is NINA-B112 from u-blox.
The device is designed to work in the Bluetooth® 2.4 GHz band.
The radio module can be deactivated by the user.
Hereby, Thorlabs declares that the radio equipment type NINA-B112 is in compliance with Directive 2014/53/EU.
The full text of the EU declaration of conformity is available at the following internet address:
https://www.u-blox.com/en

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Field Service Fiber Optic Power Meter Chapter 1 Introduction

US / Canada Registration Number China Registration Number:

and Labeling on the Device:
本设备包含型号核准代码(分别)为: CMIIT ID:
2021DJ2218的无线电发射模块。

Japanese Giteki Mark and Registration Number: Brazil Registration Number:

03882-16-05903

Korean KC Mark and Registration Number: “Este equipamento opera em caráter secundário,
isto é, não tem direito a proteção contra
interferência prejudicial, mesmo de estações do
mesmo tipo, e não pode causar interferência a
sistemas operando em caráter primário.”

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Field Service Fiber Optic Power Meter Chapter 2 Safety

Chapter 2 Safety
The safety of any system incorporating the equipment is the responsibility of the assembler of the system.
All statements regarding safety of operation and technical data in this instruction manual will only apply when the
unit is operated correctly as it was designed for.
Changes to this device cannot be made nor may components not supplied by Thorlabs be used without written
consent from Thorlabs.

Explosion Warning
The PM60 and PM61 series devices must not be operated in explosion endangered
environments!

Do not open the instrument. Apart from the battery replacement described in Chapter
5.5, there are no user-serviceable parts inside!

Laser Safety Information (PM61 Series Only)

All statements regarding safety of operation and technical data in this instruction manual will only apply when the
unit is operated correctly.

Warning: Avoid Exposure – Radiation Emitted from Apertures

Do not look into the laser aperture while the laser is on. Injury to the eye may result.

Warning: Laser Radiation

The PM61 series field service optical power meters qualify as class 2 laser instruments due to safety
measurements. When operated incorrectly, such as opening the internal mechanism of the device,
this can cause severe damage to your eyes and health! Be sure to pay strict attention to the safety
recommendations of the appropriate laser safety class, as stated for the used light source. Please
ensure appropriate laser safety measures.

The PM61 series is compliant with the IEC 60825-1:2022 standard. Laser radiation may be encountered at the
optical output port.

Laser Output Port

Figure 5 PM61 Series Laser Output Aperture

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Field Service Fiber Optic Power Meter Chapter 3 Installation

The following information on the sticker, located under the stand on the back of the device, indicates the
presence of the built-in laser, including the symbol “DO NOT STARE INTO BEAM”:

Chapter 3 Installation
Warranty Information
The precision PM60 and PM61 series devices are only serviceable if returned and properly packed into the
complete original packaging including the complete shipment plus the cardboard insert that holds the enclosed
devices. If necessary, ask for replacement packaging. Refer servicing to qualified personnel.

Packing List/Special Tools Required for Installation

Lists of items:
• PM60 Series or PM61 Series Fiber Optic Power Meter with Mounted PM20-25 2.5 mm
Ferrule Fiber Adapter
• USB Cable, Type A to Type C
• Certificate of Calibration
• Quick Reference

Installation Instructions
The PM60 and PM61 series fiber power meters are ready to operate out of the box. However, to regulatory
requirements, the unit will be shipped with a battery charge level of less than 30%, so it is advisable to fully charge
the battery prior to first use. Connect the PM60 or PM61 series to a compatible wall plug adapter or PC with a
USB power port using the supplied USB connector and then allow the power meter to fully charge (usually within
2 hours).
In case the PM60 or PM61 series should be operated remotely, install the Optical Power Monitor software from
the Thorlabs website. It comes with all required instrument drivers, examples, and an application to perform all
settings and visualize or record the measurement results. It includes useful tools like firmware update wizard, user
calibration, and laser calculator.

Changing Fiber Adapters

The PM60 and PM61 series are equipped with the PM20-25 2.5 mm ferrule adapter that allows the
accommodation of any FC, SC, ST or E2000 fiber tips. The large active area of the photodiode is also tolerant for
angled connectors like FC/APC.
To allow a steady connection of the fiber or for SMA or LC fibers, Thorlabs offers various adapters from the PM20
adapter series to replace the attached PM20-25 adapter. To remove an adapter, unscrew the installed adapter
counterclockwise and replace it by the desired PM20 series adapter.

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Field Service Fiber Optic Power Meter Chapter 4 Operation

First Measurements
Some hints to perform accurate laser power measurements:
• Press the power on/off button to turn on the PM60 and PM61 series fiber power meters.
• Make sure there is no dirt on the fiber ends and clean them if necessary.
• Open the dust cap.
• Connect the fiber tip to the installed PM20-25 2.5 mm ferrule adapter. See Chapter 3.4 for separately
available fiber adapters of the PM20 series.
• Navigate to the main measurement screen - out of the box default screen.
• Set the wavelength of your laser light source.
• Turn the unit to auto-ranging or select an appropriate measurement range.
• Perform a zeroing with switched off laser.
• Turn on the laser and read the displayed measurement result.

Chapter 4 Operation
Switching On and Off the Device

The PM60 and PM61 series powers up after pressing the button with the standby symbol (Ƅ) on the front left of
the device. The unit is ready to operate after a few seconds for booting and checking the sensor calibration data.
For most standard measurement applications, no additional warm-up time is required.

To turn off the instrument, press and hold the standby button (Ƅ) for longer than 0.3 seconds and release when
the display shows "shutting down". In case the unit hangs up for any reason, keep the button pressed (>1 second)
until the unit is forced to shut off.
The devices are equipped with a configurable shutdown timer to extend battery capacity, for more details refer
to the chapter personalization\timers.
There is also an emergency shutdown in case of low battery. In this case, you should recharge the battery as
quickly as possible by connecting it to a USB power supply or, only for the PM61 series, by placing it on a wireless
charging station.

Navigation with Touch Screen and Physical Buttons

The PM60 and PM61 series devices can be operated by the touchscreen or the physical buttons or any
combination of both.

All screens consist of a header with access to the menu (≡), different display pages, and information symbols for
battery (charging) state, remote interfaces, and when the internal memory is mapped to a PC. Up to four circular
dots show the screen position in the measurement screen carousel. In the measurement views, the header can
be expanded by a down swipe to show the current date and time, battery State of Charge (SoC), and device item
number.
All measurement views consist of a menu footer containing up to twelve buttons that are arranged in groups of
four.
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Field Service Fiber Optic Power Meter Chapter 4 Operation

Header: Contains menu button,

indicator for available screens, Expand the header by down-
remote connection states, swiping to show date, time,
and battery information. meter model and battery SoC.

Indicators for activated Pressing the info icon

measurement options. displays an info overlay with
details about the
Body: Contains up to four measurement settings.
application views. Alter the view
by left or right swiping within the This bar gauge visualizes the
body area, or clicking the dots in saturation within the
the header, or navigating the selected measuring range.
dots with the physical buttons.
Wavelength correction
Footer: Menu with up to 12 keys (left display side) and
for all measurement settings. currently set measuring
Alter the menu by pressing the range (right display side).
arrow keys, left or right swiping in
the menu area, or navigating with
the physical buttons.

Figure 6 PM60 and PM61 Series Measurement Screen

4.2.1 Button States

The touchscreen has multiple button styles, each with a color-coded state or behavior or frame indicator.

Normal or selected state

Optional or unselected state

Pressed state

Disabled state

Focused states

Figure 7 Button States

Focus status is only displayed when navigating with the physical buttons. The button you are currently navigating
to will be focused and displayed with a white border. The white frame disappears after 3 seconds of inactivity and
can be reactivated by pressing the OK button.

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Field Service Fiber Optic Power Meter Chapter 4 Operation

4.2.2 Navigating Measurement Screens

There are three ways to switch between the measurement views arranged horizontally in the carousel.
• Perform a swipe gesture to left or right within the measurement window to navigate the next view.
• Click on the horizontal dots in the header bar, the screens will change to the next right view.
• Use the physical buttons to navigate to the dots in the header, they will receive focus, indicated by a frame
around them. Press the OK button to swap the views. The frame will disappear after three seconds of
inactivity.

4.2.3 Navigating the Footer Menu

For fast access to the most essential functions, there is a horizontal menu button row at the bottom of the display.
There are up to four buttons visible with direct access that can swap with further sections of four buttons. A white
arrow showing indicates if more buttons are available and which direction they are located.
• Perform a swipe gesture over the menu buttons in the direction the white arrow shows to display the next
section of menu buttons.
• Press the white arrows.
• Use the physical up or down buttons to navigate to the footer menu. The active button will get highlighted
and can be pressed with the OK button. Use the left and right button to navigate between the menu
buttons and menu sections.

4.2.4 Screen Lock

The touch screen and physical button functions can be locked to avoid accidental inputs. Simultaneously press the
physical Up and Menu keys to lock the touch and button functions. When the touch and button functionality is
deactivated, a lock sign will appear in the header row between menu icon and the dot icons for the number of
available measurement views. Locking the screen in any menu will set the device to the last active measurement
screen.
To unlock the touch screen and physical button functions, press the physical Up and Menu keys simultaneously.
The touch screen lock is also disabled after each restart of the device.

4.2.5 Screenshot Function

By simultaneously pressing the physical Down and Menu buttons, it is possible to drag an image from the current
view, which gets automatically stored to the internal memory. The bitmap can be downloaded via USB connection
after mapping the internal flash memory to the connected PC. Browse to the SCREENSHOTS folder in the displayed
PM60 and PM61 Series drive.

Main Menu

Enter the main menu by pressing the physical Menu button (≡) or the menu icon in the left upper corner of the
touch display. To exit the menu, press the physical Menu button again or in the touch screen the left arrow button
(exits for one level) or the home button (exits to the last measurement screen).

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Field Service Fiber Optic Power Meter Chapter 4 Operation

Figure 8 PM60 and PM61 Series Main Menu Screen

4.3.1 Users (PM61 Series only)

The PM61 Series offers the option of creating up to three users whose usage rights can be restricted or adapted
to the target application. When delivered, only the administrator is set up with all rights. To enter or configure
users, enter the “Admin” section, and enter the configurable 4-digit pin code (the factory code is 0000).
In the upcoming window, it is possible on the one hand to configure the device for the admin user or change the
pin code; on the other hand, to activate up to three individual users with pre-configured settings, applications, or
restrictions.

Figure 9 PM61 Series User Configuration Menu

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4.3.2 Application
In this menu and its submenus, all operationally relevant settings are arranged in a table with selectable rows.
On the PM61 Series, the “Application” menu item with its entire setting range is only visible and configurable for
the administrator. Please enter the “Users” menu with administrator privileges, to apply all settings for ordinary
users.
1. Measurement
The measurement menu gives an overview of all measurement settings. A complete configuration can be
done here, or in the measurement screen, using the footer menu buttons. For a better overview and to
avoid scrolling, the menu is divided into 2 pages that can be navigated using the arrow keys in the footer
of the menu window.
Measurement Menu Page 1

ſ Range: Shows the actual measurement range or auto-ranging. Pressing the entry,
a window will open to select between 21 power ranges or auto-ranging.

Ɛ Delta Mode: Switch on and off relative measurements.

Ƌ Units: Select between a linear measurement representation in Watts or a

logarithmic in dBm.

ƍ Wavelength: Shows the selected wavelength setting. Pressing the entry will show a new
window with four preconfigured wavelength settings. By long-pressing on
an entry, the correction wavelength can be adjusted within a number picker
dialog.

Ɓ Correction: Allows entry of a value in dB for attenuation or gain, and in percent for
transmission to compensate for external optical elements in the fiber
network.
Measurement Menu Page 2

ƌ Update: Sets the update rate, in combination with an averaging of the displayed
measurement value between 1/s with 1000 times averaging, 3/s with 333
times averaging and 10/s with 100 times averaging.
Ǝ Analog Filter: The analog filter restricts the full analog bandwidth of up to 100 kHz,
depending on the chosen measurement range, down to 16 Hz for all
measurement ranges.

Ɖ Acquisition: The PM60 and PM61 series can detect maximum power levels by a software
peak detection algorithm. The acquisition menu can be set for CW beams
with permanent readout or for two kinds of maximum value detection, the
peak mode for pulsed signals down to several µs pulses or sinusoidal or
triangular signals; and the top mode for rectangular signals. Both peak and
top mode get armed when the signal exceeds the trigger level, that was set
under the trigger menu.

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Ƒ Trigger: For proper peak detection, the trigger level should be set between 50% and
90% of the expected peak power level.

2. Pass / Fail (PM61 Series Only)

The pass / fail analysis function allows setting limits for power or loss, in which the target power level
should be. The absolute power limits can be set in Watts (W) or dBm while the relative loss limits always
need to be set in dB or % representation. The settings can be individually configured for each user.
For a better overview and to avoid scrolling, the menu is divided into 2 pages that can be navigated using
the arrow keys in the footer of the menu window.

Ƥ Min: Enter the minimum acceptable power level in W or dBm; or the minimum
acceptable loss value in dB or %. Pressing the value will open the numerical
input dialogue screen. Pressing the ƛ/Ɯ eye labels deactivates or
activates the low limit.

ƥ Max: Enter the maximum acceptable power level in W or dBm; or the maximum
acceptable loss value in dB or %. Pressing the value will open a numerical
input dialogue window. Pressing the ƛ/Ɯ eye labels deactivates or
activates the low limit.
For quality documentation purposes, it is possible to record the results in a file to the internal memory.
The stop record criteria and interval can be configured between measurements on the second page of the
pass / fail menu.

Ƣ Stop: Configure the stop criteria in number of samples, time to record, or chose
manual to stop the recording by hitting the stop button in the footer menu.

Ʀ Interval: The record interval can be set from 1 ms up to 1 second in millisecond

increments.
3. Logging
The PM60 and PM61 series meters allow data logging over time and store the results to the internal flash
drive. The configuration of stop criteria, interval, and measurement units can be individually set for each
user (PM61 series only).

Ƣ Stop: Configure the stop criteria in number of samples, time to record, or chose
manual to stop the recording by hitting the stop button in the footer menu.

Ʀ Interval: The record interval can be set from 1 ms up to 1 second in millisecond

increments.

Ƌ Units: Select between a linear measurement representation in Watts or a

logarithmic in dBm.

4.3.3 Personalization
The personalization menu allows individual settings and consists of following sub menus:

Ɗ Language: The device language can be switched between English, German, Chinese
(simplified), Spanish, French and Japanese.

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Ə Scheme: Switches the GUI design between dark, bright, and black.

Ƈ Brightness: Sets the display brightness level in 5 steps. The brightness level has a
significant influence on the battery operating time. It is advisable to use the
brightness dimming function.

Ƈ Timers: There are individual timers for the display dimming function (Ƈ) and the
auto shut-down function (Ƅ). Both timers can be individually set for
battery operation (ƅ) and external power supply operation (Ɔ).

ƕ Date/Time: The PM60 and PM61 series have a built-in real-time clock that is constantly
powered when the battery is connected and can provide the extremely low
operating current required. Setting the correct date and time can be done
remotely or using the date and time scales in this menu.

ƃ Key tone: When activated, each physical button operation will be confirmed with a
beep sound. There is no tone on touch screen events.

4.3.4 Visual Fault Locator (PM61 Series Only)

The PM61 series devices feature an integrated visual fault locator (VFL), useful for identifying fibers in a fiber
bundle or detecting cable breaks. The VFL consists of a Class 2 red guide laser with 2.5 mm ferrule pickup that
can be switched on in CW mode or in two different flashing modes with a frequency of 1 Hz and 3 Hz.
The VFL function can be enabled or disabled in the admin and user settings.

4.3.5 Connectivity
The connectivity menu consists of following functions and information:
Go To Local: Press this button to lock out from remote operation and return to device
operation.
Bluetooth On/Off: For the PM61 series, the Bluetooth transmitter can be permanently
switched off in the interface menu, for example, for radio-critical
environments. The Bluetooth function is activated by default and will also
be activated again after a factory reset.
SD Memory: Per default and after each restart, the built-in NAND flash memory (eMMC)
is mapped to the power meter file system to allow measurement data
storage.
To access eMMC, the PM60 or PM61 series device must first be connected
to a computer via a USB cable. After pressing the SD Memory menu, the icon
will switch to “PC” and the connected computer will detect a flash drive with
folders for data records, screenshots, and device logs. The data can be
exchanged by drag and drop. After data exchange, press again on the SD
Memory menu to switch the memory back to the PM60 or PM61 series
device.
When pressing the SD Memory menu without connected PC, a warning will
appear, and the memory will remain in possession of the power meter. It
further appears a dialogue to switch back the memory to the PM60 or PM61

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series device, when trying to start data logging while the memory is mapped
to a PC.
USB-ID: The USB-ID consists of a vendor ID (0x1313 for Thorlabs), the device ID
(0x80BB for PM60 and PM61 Series), and the device serial number.

4.3.6 Information
This menu shows the device's serial number and sensor information. There are three buttons on the right side of
the footer menu to display firmware and hardware revisions, detailed battery information, and free flash memory.
The middle button shows an information and error log, and the left button performs a reset to the factory settings.

Glossary of Symbols
Header Line

Menu button. This icon is left in the header line and its graphic is used on the right
physical button.
Back button. In sub menus, the “Menu” icon swaps with an arrow showing to the left
side. The meaning is “go back” or go one level higher.
Home button. Pressing this button quits the menu and jumps to the last measurement
screen.
Quit button. Quit sub-menu.

Scroll to the next view.

Header Line Symbols for Information Only, Without Touch Function:

Battery symbol shows state of charge (<10%, 50%, 100%), or charging.

Device connected to computer USB port; active communication; programming error.

Device is paired and connected per Bluetooth, the icon turns green after receiving a
valid command and red at a programming error.
Device error; sensor temperature error.
Touch screen and physical buttons are locked. Release by simultaneously pressing the
physical “Up” and “Menu” buttons.

4.4.1 User Management (PM61 Series Only)

User menu. Enter the user management menu.

Admin user. Admin user with all privileges.

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Ordinary user. User has restricted privileges, needs to be configured by the admin user.
There are up to three ordinary users that can have individual configurations.
Edit button. Enter the user menu or rename a user.

Activates or deactivates a user or a function.

Resets a user to the factory settings.

Digital menu button. Configures the physical menu button to a predefined action. This
can be a one-time auto-ranging, starting/stopping the data logging, or activating the
VFL. By default, the button is configured to access the menu.
Enter the settings to configure the available options for each user, including the admin
user. A 4-digit password is necessary to access the settings. The factory default
password is <0000>.
Change the administrator password. A factory reset, that can only be performed by the
admin user, will reset the password to default <0000>.
Export / Import all device settings to a JSON file (java script object notation). This
feature can be used after entering the password, to apply the same settings to multiple
devices.

4.4.2 Measurement Application and Option Settings

Settings button. Enter the measurement and option settings menu.

Sensor button. Enter the measurement settings.

Pass / fail button. Enter the pass / fail analysis configuration (PM61 Series Only).

Graph button. Enter the logging configuration.

4.4.3 Visual Fault Locator (PM61 Series Only)

VFL button. Enter the VFL configuration (PM61 Series Only).

4.4.4 Connectivity
Interface button. Enter the remote-control interface menu.

Local button. Return from USB remote to local operation.

Activates or deactivates the Bluetooth transmission (PM61 Series Only).

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Allocates the device flash memory to the device (default) or to a per USB connected
computer, accessible as a mass storage device.

4.4.5 Device Management

Enter the device settings.

Enter the device information menu.

Factory reset button. Performs a factory reset. All device settings will be set to default.

Shows the device log.

Configures the device log from info log to debug and info mode.

Save button. Save info or debug log to internal memory.

Delete button. Delete current info or debug log.

Reset button. Reset device log.

Information button. Shows detailed device information, like firmware and hardware
revision, battery state and free flash memory.

4.4.6 Measurement View

Ranging function button. Switches between auto-ranging and manual ranging

Up / down buttons. Turns the measurement one range more insensitive (up) or
sensitive (down). After pressing one of the arrow icons, the unit goes in manual
ranging.
The auto-set function can on one hand perform a “one-time-auto-ranging”, while the
instrument remains in manual ranging; or in peak or top mode, find the optimal
measurement range and trigger level setting.
Switches the measurement units between linear representation of the measurement
value in Watts or logarithmic representation in dBm.
Wavelength button. Opens the dialogue for the spectral correction to change the user
wavelength.
Delta button. Turns on and off the relative measurement view by taking the
measurement value at the time of pressing the button as reference value.
Zero button. Zeroes the measurement value to compensate for dark current or
backlight.

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Correction button. Opens a dialogue to make a gain or attenuation correction of the

measurement value.
Bandwidth button. Limits the analog bandwidth from up to 100 kHz to 16 Hz for an
effective noise reduction.
Update button. Along with the display update rate, that can be set between 1/s, 3/s
and 10/s, there is a dynamic averaging for digital filtering.
Mode button. Switches the measurement mode from permanent updating CW mode
to peak or top mode, where the measurement value update is triggered by exceeding
a predefined trigger level and waiting for maximum detection.

Trigger button. Set the trigger level for peak and top mode between 3% and 90% of the
measurement range
Laser button. Turns on and off the laser of the visual fault locator.

Pops out the measurement information overlay.

Measurement View Symbols for Information Only, Without Touch Function:

VFL is active. (PM61 Series Only)

Peak mode: Waiting for trigger; valid trigger condition.

4.4.7 Pass / Fail Analysis (PM61 Series Only)

Pass / fail mode buttons. Switches the pass-fail analysis between absolute and relative
measurement.
Record button. Starts and stops the pass-fail analysis record. The measurement data
automatically get stored to the internal memory.
Delete button. Deletes the last record.

Live button. Turns back from record mode to live mode.

Settings button. Enter the pass/fail settings

Reset the reference value for the loss measurement to the actual power level

4.4.8 Logging and Statistics

Record button. Starts and stops the recording of data. The measurement data
automatically get stored to the internal memory.
Graphical representation between strip chart showing the last 10 seconds or the
complete graph from start.

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Field Service Fiber Optic Power Meter Chapter 4 Operation

Delete button. Deletes the last record.

Defines the stop criteria of the recording. It can be set to manual operation or stopping
after a certain time, or number of recorded samples.

Define the interval between 1 ms and 1 s intervals.

Number and Text Dialogues

For entering numbers or renaming text strings, numerical or alphanumerical dialogues are used. In the numerical
input windows, usually there is a standard number pad and additional buttons for the selection between different
units or to toggling the exponents within one unit button. The entry limits are shown in a header line. To delete
numbers, use the backspace button (), to confirm the entry use the (OK) button. On some dialogues, there are
buttons with toggling functions, like switching between pW, nW, µW, mW, and W.
The alphanumerical display keyboard has the backspace button () to delete single characters, or when keeping
pressed, deleting all characters. The (OK) button is to confirm the entry and a three-state button to switch
between upper- and lower-case characters and numbers.

To exit the dialogue screen without changes, press the quit button (⊗) in the header line.

Figure 10 Wavelength and Pass/Fail Analysis Numerical Entry

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Field Service Fiber Optic Power Meter Chapter 4 Operation

Figure 11 Attenuation Numerical Entry and Alphanumerical Entry

Power Measurements
The main measurement screen shows a large digit numerical representation of the actual power value, supported
by a circular level display indicating the level within the selected measurement range.
All settings can be done with the button carousel in the footer menu.
Clicking or navigating and confirming on the information sign () will add an overlay with all relevant
measurement configurations. Clicking within the information frame will close the dialogue.

4.6.1 CW Mode
This is the basic power measurement, where the measurement value continuously gets updated. Enabled options
like attenuation, zeroing, filtering, or auto ranging are indicated as icons right to the set wavelength.

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Field Service Fiber Optic Power Meter Chapter 4 Operation

Figure 12 Main Measurement Screen and Information Overlay.

4.6.2 Peak and Top Mode

To perform peak power measurements, browse to the first footer menu by left arrow, swiping the menu to the
right side, or navigating with the physical buttons. Change the setting from CW to either top or peak, set trigger
and measurement range or perform a “auto-set”. The measurement units will get the suffix PK. There is also a
trigger indicator that turns yellow when pulses or levels that exceed the trigger threshold are detected.
The measurement values only get updated on successful trigger conditions.

Figure 13 Measurement Screen in Top or Peak Mode

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4.6.3 Visual Fault Locator (PM61 Series Only)

The visible laser can be switched on by the left button in the measurement screen. When the laser is on, it is not
possible to switch screens until it is turned off. Switch between the CW and 1 Hz / 3 Hz flashing modes by pressing
the right setup button.
A laser warning sign in the upper left corner of the measurement screen indicates that the laser is activated.

Figure 14 PM61 Series Only: Visual Fault Locator Activated

Figure 15

Data Logging and Statistics

4.7.1 Data Logging

The data logging function allows recording of the measured power levels over time. After pressing the start button
(icon with the red circle), the recording to a file on the internal flash memory gets started with the configured
time interval. The stop condition can be set automatically after a certain number of samples or after a certain
time, but can also be stopped manually by pressing the stop button. During the recording, the graph can be shown
from the beginning or as strip chart over 10 seconds by pressing the toggling 0...t / Δt buttons.
After stopping the recording, it is possible to delete the just recorded file, as long it is visible on the screen, by
pressing the trash-bin icon and confirming to delete the file.
The files are stored under the folder RECORDS on the internal flash drive with the record date and time in the file
name in a csv format. The files can be accessed by mapping the memory to an external PC via USB connection.
The files include all relevant device and sensor information, the most important settings, the start time, and csv
sign separated relative time and measurement value table. Please note that the separator is comma, and the
decimal separator is period like it is usual in many countries. When loading to an Excel spreadsheet consider this
in the language settings or make the adjustment in text- or notepad in advance.
By pressing the cogwheel icon, the record settings can be modified. PM61 series only: The admin user can directly
access the configuration menu. All ordinary users do not have the cogwheel icon and must be pre-configured by
the admin user.

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Field Service Fiber Optic Power Meter Chapter 4 Operation

Figure 16 Data Logging

4.7.2 Statistics
In combination with the graphical representation of the data logging, there is a statistic view on the same set of
data. During and after the record it is possible to switch between both views by swiping right or left or navigating
over the dots in the header line.
The statistics view offers, along with the number of samples, time elapsed and the interval time, the mean value,
the ratio, and minimum and maximum value of the data record in an overview.

Figure 17 Statistics View

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Pass/Fail Analysis (PM61 Series Only)

The pass-fail analysis function is an extremely useful tool for quality control in production and service. It gives
visual attention to whether the measurement value is within a predefined power range without the need of
reading the exact power value. The Limits can be configured for absolute power and relative loss measurements
by the admin user for themself and the ordinary users.

Figure 18 PM61 Pass-Fail Analysis for Absolute Power Levels

The loss pass-fail analysis can be used to check fiber connections or other fiber components, like attenuators,
splitters, couplers, or circulators. Perform a measurement with a reference fiber and without the component to
analyze and press the toggling ΦABS / ΦLOSS button to perform the reference measurement. The reference
measurement can be renewed with the ΦREF update button. The loss measurement can be viewed like a delta
measurement; a power loss is displayed with a negative sign and a power gain with a positive sign.

In the pass/fail settings menu, it is also possible to omit one of the limits by pressing the eye label ƛ and
unselecting one of the Min or Max markers. The corresponding line in the menu will then be shown as disabled
and the eye label shows Ɯ.

The limit not considered is then displayed in the measurement window as “------”.

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Field Service Fiber Optic Power Meter Chapter 4 Operation

Figure 19 PM61 Pass-Fail Analysis for Relative Power Levels (Loss)

In both cases, it is possible to record the measurements to a file on the internal flash memory. Therefore, the
admin user can configure the stop condition and the measurement interval in the logging menu for themself and
for the ordinary users. During and after the record, the screen will change and show minimum and maximum level
and the analysis result. The data will automatically be stored in the PASS_FAIL folder on the flash memory. The
last record can be deleted right after recording. To access the files in csv format, connect the PM61 series power
meter to a computer via USB connection and allow access to the internal memory (Menu\SD Memory). The files
include all relevant device and sensor information, the most important settings, the start time, and csv sign
separated relative time, measurement value, and pass-fail result table. Please note that the separator is comma,
and the decimal separator is period like it is usual in many countries. When loading to an Excel spreadsheet
consider this in the language settings or make the adjustment in text- or notepad in advance.

Figure 20 PM61 Series Pass-Fail Record for Loss and Absolute Power

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Battery Usage and Charging

The PM60 and PM61 series power meters are sourced from a lithium-polymer (LiPo) rechargeable battery, which
has sufficient capacity for a long working day with continuous instrument use. The operating time can be extended
by keeping the backlight on a medium level and using the display dimming and shut-down timers.
The instrument’s battery can be recharged by using the provided USB type C to type A cable and connecting it to
any USB power supply or computer USB port; the smart charging circuit configures automatically for the available
and optimum charging voltage and current. To protect the battery, the maximum charging current is limited to
1 A, which results in the fastest possible charging time of approximately 2.5 hours.
The PM61 series also features a wireless charging coil integrated into the foldable stand. It can be charged with
any compatible wireless charging transmitter rated at 5 W with up to 1 A. Place the instrument with the cross
mark on top of the wireless charging transmitter and check if the charging LED on the PM61 series starts flashing
green.
The charging LED has the following states:
• Off: Device runs on battery. If turned on, check the battery state in the display or
in the device info menu.
• Flashing green: Device is connected to an external power source and battery is charging.
• Permanently green: Device is fully charged and connected to an external power supply.
• Red: Battery is overheated, or there is a problem with the connected power supply.
The battery will not get charged, please see Chapter 6 troubleshooting and
repair.

Remote Operation

4.10.1 USB 2.0 Interface

The PM60 and PM61 series power meters can be controlled remotely via the USB 2.0 interface. The
straightforward way is to download the Optical Power Monitor software - OPM - from the Thorlabs website. It
comes with all required instrument drivers, programming examples, command reference, and a bunch of useful
tools, like firmware update, driver switcher, and laser calculator.
After starting the software, it automatically scans for connected Thorlabs power meters and other supported
devices, lists them, and connects to the first found instrument. The range of functions of the software covers the
possibilities of individual device functions to a wide extent.
All Thorlabs optical power meters are devices that follow the USBTMC (test & measurement class) protocol. This
is a USB device class that allows communication with testing and measuring devices, using SCPI (Standard
Commands for Programmable Instruments) commands. The specification is based on USB 2.0 and was approved
at the end of 2002 by the IVI (Interchangeable Virtual Instrumentation) foundation. USBTMC is supported by the
VISA (Virtual Instrument Software Architecture) standard and defines a USB488 subclass for devices that transmit
messages based on IEEE 488.1 and IEEE 488.2 (GPIB).
Mandatory to integrating a USBTMC device is to have an installation of VISA. VISA is a widely used application
programmable interface (API) in the test and measurement industry and available for most operating systems.
Most common are the NI-VISATM or PyVISA, but to get rid of the need to installing third-party software packages,

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Field Service Fiber Optic Power Meter Chapter 5 Maintenance and Cleaning

Thorlabs developed their own version of VISA that uses the Thorlabs standalone TLPMX drivers and that
automatically installs with the Thorlabs OPM software package.
It is important to note that both NI-VISATM and TLPMX drivers can be installed at the same time, but only one of
them can be assigned to an instrument at a time. Switching the drivers needs administrators’ rights; it can be
performed in the device manager, or more convenient, with the Thorlabs Driver Switcher App, that is embedded
in the Thorlabs OPM software.
During an active remote session, it is not possible to perform settings that may influence the measurement result,
like changing the wavelength or measurement range.
Please refer to the Thorlabs website and the resources around the Thorlabs OPM optical power monitoring
software for more information and full command reference.

4.10.2 Bluetooth Interface (PM61 Series Only)

The PM61 series has a built in Bluetooth module, following the Bluetooth Low Energy (BLE) standard. When
activated, it is possible to establish a wireless connection to computers or mobile devices.
Prior to a connection with data transmission, it is necessary to pair the PM61 Series with the target device.
Therefore, open the Bluetooth settings on the target device and perform a scan for PM61 Bluetooth devices in
the surrounding. On Windows PCs, as well as on mobile devices, it will show as “PM61”. Connect to the found
PM61 Series device.
Communication is then possible via SCPI commands, using the drivers, or using an app. The Thorlabs optical power
meter software can also be used to communicate via Bluetooth low energy.
Check out the Thorlabs website for iOS and Android applications that support communication with Thorlabs BLE
devices.

Chapter 5 Maintenance and Cleaning

General Guidelines
• Before usage, consistently clean and examine fiber-optic connectors.
• Maintain a dust-free environment for the unit.
• Wipe the unit casing and front panel with a slightly damp cloth.
• For cleaning the touch screen, a commercial screen cleaner is acceptable.
• When storing the unit, apply the dust caps to the fiber port(s) and keep it in a clean and dry area at room
temperature, avoiding direct sunlight.
• Steer it clear of high humidity and substantial temperature fluctuations.
• Avoid exposure to unnecessary shocks and vibrations.
• The unit is not waterproof! In the event of liquid spillage, power off, disconnect from external sources,
and allow the unit to thoroughly dry before use.

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Cleaning Detector Ports

Always cover detectors with protective caps when the unit is not in use.

1. Unscrew the fiber adapter from the detector.

2. Inspect the filter surface and blow off any dust with compressed air.
3. Polished filter surfaces, like the absorptive ND filters for PM6xA, PM6xC, and PM6xCH can be cleaned
with a swab, moistened with alcohol, or other optical cleaning fluids.

Do not mechanically rub on any diffused surfaces, this may lead to changes in the
sensor responsivity!

Cleaning the VFL Connector

The visual fault locator has a built-in ferrule tip that can be cleaned using a mechanical cleaner like the Thorlabs
FBC250.

Risk of Eye Damage

Verifying the surface of the connector with a fiber-optic microscope while the unit is
active may result in permanent eye damage.

1. Switch off the unit by pressing the on/off power button for > 0.3 seconds.
2. Refer to user manual of the mechanical bulkhead and connector cleaner.

Recalibration
Thorlabs recommends a calibration interval of 12 months. Please contact the Thorlabs technical support team for
your recalibration request and issuing an RMA number.

Battery Replacement

The PM60 and PM61 series meters use smart lithium-polymer (LiPo) batteries. These
batteries with built-in protection have been verified with Thorlabs optical power meter
instruments. For this reason, only Thorlabs approved batteries of the same type and
model (2P/LPP 503562) can be used.
Depending on country-specific policies, please contact your local Thorlabs technical
support for assistance.

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Field Service Fiber Optic Power Meter Chapter 5 Maintenance and Cleaning

Dispose of used batteries appropriately by recycling them in accordance with local

regulations. Refrain from placing them in regular garbage receptacles.

1. If applicable, disconnect attached USB cables and optical fibers.

2. Turn off the unit.
3. Place the unit on a level and tidy surface, positioning the display facing downward.
4. Remove the 4 screws in the rear shell by using a Torx© TX8 driver turning counterclockwise.
5. Raise the rear shell by gripping and holding the front panel together with the front shell, ensuring both
front shell and front panel remain together.
6. In case the unit is equipped with a wireless charging coil, take care of the wires that connect to the power
meter circuit board.
7. Disconnect the battery and remove it from the holder in the rear shell.
8. Take a battery of the same type and rating and place it in the rear case bracket with the cables facing
downwards in the cable channel.
9. Attach the sticky rubber spacer. The spacer from the old battery can be reused on top of the new battery.
10. Plug in the battery.
11. Carefully put the rear shell in place, insert the screws and tighten them gently.

Front Shell

Front Panel

LiPo Battery

Rear Shell

Torx© Screws

Figure 21 Battery Replacement

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Firmware Update
1. Turn on the unit.
2. Connect the USB cable to a free port of the computer and to the PM60 or PM61 series.
3. Download the new firmware package from the Thorlabs website to your local drive.
4. Open the optical power meter software.
5. Browse to Help\Tools\Firmware Update Tool
6. Select the new firmware file and follow the instructions.
7. Wait until installation is complete, do not turn off the unit during installation!
8. Restart the instrument with the updated firmware.

Change the Hinge Position of the Protective Cover

The protective cap of the PM60 or PM61 series device is intended to cover the fiber connectors simply and
effectively when the meter is carried around. It is possible to change the opening direction or completely remove
the cover.
1. If applicable, disconnect attached USB cables and optical fibers.
2. Turn off the unit.
3. Place the unit on a level and tidy surface, positioning the display facing downward.
4. Loosen the 4 screws in the rear shell by 2-3 turns counterclockwise by using a Torx© TX8 driver.
5. Carefully raise the rear shell by gripping and holding the front panel, ensuring it remains attached to the
front shell as far as the hinge of the cover gets released.
6. Take off the protective cover and place it in mirrored position or remove it completely.
7. Check the proper position of the front panel, press both shells together and fix the 4 screws clockwise.

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Field Service Fiber Optic Power Meter Chapter 6 Troubleshooting and Repair

Chapter 6 Troubleshooting and Repair

Below are a few checks to help in troubleshooting problems that may arise. Please contact your local Thorlabs
Technical Support office with any questions.

Failure Troubleshooting

Unit Does Not Turn On Ensure that the battery is sufficiently charged; otherwise, connect the device to
an external power supply.
If not completely charged, press the standby button for > 3 seconds, and try to
start the device again by short pressing the standby button.

Battery Does Not Charge Check for the charging LED; it must blink green during charge. In case the LED
lights red, check the power supply or check for abnormal heating of the device.

Unit Automatically Switches Check the battery status. The unit turns off to protect the battery below 6%
Off
SOC.
Check also the automatic switch off feature in the device settings.

Measurement Value Does Not Check if the unit is in peak mode or top mode. The measurement will only
Update
update on valid trigger conditions. Otherwise restart the instrument.

Unit is Frozen and Does Not Press the power button until the device powers down. Restart the device.
React to Any Interaction

Wireless Charging Function Check the correct orientation of the charging transmitter. Check that the
Does Not Work
transmitter has power and is turned on. The PM61 series charging LED should
flash to indicate charging or be solid when fully charged.

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Field Service Fiber Optic Power Meter Chapter 7 Disposal

Chapter 7 Disposal
Thorlabs verifies our compliance with the WEEE (Waste Electrical and Electronic Equipment) directive
of the European Community and the corresponding national laws. Accordingly, all end users in the EC
may return “end of life” Annex I category electrical and electronic equipment sold after August 13, 2005,
to Thorlabs, without incurring disposal charges. Eligible units are marked with the crossed out “wheelie
bin” logo (see right), were sold to and are currently owned by a company or institute within the EC and
are not dissembled or contaminated. Contact Thorlabs for more information. Waste treatment is your own
responsibility. “End of life” units must be returned to Thorlabs or handed to a company specializing in waste
recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site. It is the user’s responsibility
to delete all personal data stored on the device prior to disposal.

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Field Service Fiber Optic Power Meter Chapter 8 Thorlabs Worldwide Contacts

Chapter 8 Thorlabs Worldwide Contacts

For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-date
contact information.

Corporate Headquarters Product Manufacturer

Thorlabs, Inc. Thorlabs GmbH
43 Sparta Ave Münchner Weg 1
Newton, New Jersey 07860 D-85232 Bergkirchen
United States Germany
sales@thorlabs.com sales.de@thorlabs.com
techsupport@thorlabs.com europe@thorlabs.com

EU Importer UK Importer
Thorlabs GmbH Thorlabs Ltd.
Münchner Weg 1 204 Lancaster Way Business Park
D-85232 Bergkirchen Ely CB6 3NX
Germany United Kingdom
sales.de@thorlabs.com sales.uk@thorlabs.com
europe@thorlabs.com techsupport.uk@thorlabs.com

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www.thorlabs.com