62.

5 Micron
Multimode Fiber

Lucent Technologies’ 62.5 Micron Multimode Fiber is a graded index fiber

Benefits
optimized for operation at 850 and 1300 nm. It uses a carefully controlled • Dual wavelength capability for
increased versatility
refractive index profile to achieve low attenuation and high bandwidth at
• Excellent dimensional properties for
both operating wavelengths. The D-LUX® coating applied over the glass
low loss connectorization
surface protects the fiber and enhances its long-term reliability.
• Compatible with FDDI networks
and ATM protocols
Each fiber is proof tested so that it will survive installation loads and
• D-LUX coating for excellent
associated long-term residual stresses, even under extreme environmental
environmental performance and
conditions. long-term reliability
• Excellent resistance to bending-
induced losses
Application
Our 62.5 Micron Multimode Fiber consists
• Transmission systems using LED
of a germanium-doped silica core within a
125 MICRON sources at 850 and/or 1300 nm
CLADDING
silica cladding. The refractive index of the
• Premises distribution systems core is varied with radial position to
achieve optimum bandwidth and
• Data links
attenuation performance at both 850 and
62.5 MICRON CORE • Computer networks 1300 nm. The nominal refractive index
difference (∆) at the core center is 2.0%.
Cross-section of Fiber • Local Area Networks (LAN)
The fiber has a nominal Numerical
Aperture of 0.275 to optimize the capture
of light energy emitted by the transmitter.
Specifications
All fibers are proof tested at 100 kpsi for
Cladding diameter: 125.0 ± 1.0 µm long term reliability. Excellent geometrical
Core diameter: 62.5 ± 3.0 µm properties permit low loss connectorization
with a variety of connectors.
Core/Clad concentricity error: ≤3.0 µm
Core noncircularity: 6% maximum (typical value <2%) All Lucent Technologies fibers feature the
Coating diameter (uncolored): 245 ± 10 µm D-LUX UV-cured acrylate dual coating
Numerical aperture: 0.275 ± 0.015 system. The D-LUX coating system
Attenuation (Customer specifies 0.7–1.0 dB/km at 1300 nm consists of an inner, low modulus primary
maximum value within range): 2.8–3.5 dB/km at 850 nm coating which is applied directly to the
Bandwidth (Customer specifies 400–1000 MHz-km at 1300 nm fiber cladding surface, and an outer high
minimum value within range): 160–250 MHz-km at 850 nm modulus secondary coating. The coatings
are mechanically strippable and have a
Proof Test levels: 100 kpsi minimum (or as specified)
nominal outside diameter of 245 µm.
The D-LUX coating system provides D-LUX coating makes fiber identification
unparalleled performance in a wide range simple and reliable even after aging.
of environments. D-LUX coating mini-
mizes microbending losses while provid- Our 62.5 Micron Multimode Fiber is used
ing superior abrasion and cut-through in a variety of cable designs including
resistance. These features allow our fiber central tube, loose tube, and ribbon. It is
to withstand the frequent handling com- also used extensively in buffered fiber
mon to premises distribution applications. applications including cables, cordage
The superior color code retention of and jumpers.

Transmission Characteristics
Attenuation:
The maximum attenuation (loss) in dB/km may be specified within the ranges
indicated in the table below:
Wavelength (nm) Maximum Attenuation (db/km)
850 2.8–3.5
1300 0.7–1.0

Attenuation Difference:
The attenuation difference between 1380 and 1300 nm is ≤1.0 dB/km.
Point Discontinuities:
There are no attenuation discontinuities greater than 0.2 dB at 850 nm or 1300 nm.
Bandwidth:
The minimum bandwidth in MHz-km may be specified within the ranges indicated in
the table below:
Wavelength (nm) Minimum Bandwidth (MHz/-km)
850 160–250
1300 400–1000

Chromatic Dispersion:
Zero dispersion wavelength (λ0): 1328–1350 nm
The maximum dispersion slope (S0) at λ0: 0.11 ps/nm2-km
Dispersion at any wavelength (λ) in the range 750–1450 nm may be calculated using
the following equation:
Dispersion = D(λ) = S0 λ4 [1- λ0
4

λ4 ] ps/(nm-km)
Numerical Aperture: 0.275 ± 0.015

Geometrical Characteristics
Glass Geometry
Core Diameter: 62.5 ± 3.0 µm
Core Noncircularity: ≤6.0%
Cladding diameter: 125.0 ± 1.0 µm
Core/Clad Concentricity Error: ≤3.0 µm
Cladding Noncircularity: ≤2.0%
Coating Geometry
Coating Diameter (uncolored) 245 ± 10 µm
Coating/Cladding Concentricity Error: ≤12 µm
Length
Standard spool lengths are: 2.2, 4.4, and 8.8 km
Lengths cut to specific customer request are also available.
Mechanical Characteristics
Proof Test:
100 kpsi (0.7 GPa)
Higher proof test levels are available upon request.
Coating (Performance Characterization):
Coating Strip Force:
The force to mechanically strip the dual coating is ≥1.3 (0.3 lbf.) and
< 8.9 N (2.0 lbf.)
Coating Appearance:
The dual coating layers are free of voids or entrapped bubbles.
Pullout Force (Adhesion of Coating to Glass Surface):
The pullout force is >6.2 N (1.4 lbf.) and <22.2 N (4.9 lbf.)
Fiber Curl:
The fiber curl is ≥ 2m.
Fiber Shipping Spool Mechanical Specifications:
Flange Diameter: 9.25 in (23.50 cm)
Barrel Diameter: 6.00 in (15.24 cm)
Traverse Width: 3.39 in (8.61 cm)
Weight: 1.22 lbs. (0.46 kg.)

Environmental Characteristics

Operating Temperature Range: –60°C to +85°C

Temperature Dependence of Attenuation:
Induced attenuation, –60°C to +85°C at
850 and 1300 nm ≤0.5 dB/km
Temperature – Humidity Cycling:
Induced attenuation, –10°C to 85°C
and 95% relative humidity at 850 and 1300 nm: ≤0.5 dB/km
Water Immersion, 23°C:
Induced Attenuation due to Water Immersion
at 23 ± 2°C at 850 and 1300 nm: ≤0.5 dB/km
Accelerated Aging (Temperature), 85°C:
Induced Attenuation due to Temperature Aging
at 85 ± 2°C at 850 and 1300 nm: ≤0.5 dB/km
Retention of Coating Color:
D-LUX coated fiber shows no discernible change in color when aged.
– for 30 days at 95° and 95% relative humidity
– for 20 days in dry heat, 125°C

Other Performance Characteristics

Nominal index of refraction difference between

peak of core and cladding: 2.0%
Effective Group Index of Refraction:
850 nm 1.496
1300 nm 1.491
Dynamic Fatigue Parameter (nd) ≥20
Static Fatigue Parameter (ns) ≥20
Weight Per Unit Length: 64 grams/km
Test Methods Ordering Information
The following industry-accepted test methods are used to characterize fibers To order optical fiber, please contact
described herein. your Lucent Technologies Sales
Representative, or the Lucent
Fiber Parameter EIA/TIA Test Method IEC Test Method
Technologies Optical Fiber Sales
Attenuation EIA/TIA-455-56 IEC 793-1-C1A Representative at (770) 446-4700. For
IEC 793-1-C1C technical questions on Optical Fiber,
please call our Lucent Technologies
Point Discontinuity EIA/TIA-455-59 IEC 793-1-C1C
Technical Information Number
Bandwidth EIA/TIA-455-51 IEC 793-1-C2A 1-800-344-0223, ext. 3500.
Chromatic Dispersion EIA/TIA-455-168 IEC 793-1-C5B
Lucent Technologies fiber is available
Numerical Aperture EIA/TIA-455-177 & -47 IEC 793-1-A1A natural (uncolored) or with distinctive
color inks applied to the fiber coating.
Core Diameter EIA/TIA-455-58 & -43 IEC 793-1-A2
Core Noncircularity EIA/TIA-455-176 IEC 793-1-A2 The following colors are available:
1. Blue 7. Red
Cladding Diameter EIA/TIA-455-176 IEC 793-1-A2
2. Orange 8. Black
Cladding Noncircularity EIA/TIA-455-176 IEC 793-1-A2 3. Green 9. Yellow
4. Brown 10. Violet
Core/Cladding
5. Slate 11. Rose
Concentricity Error EIA/TIA-455-176 IEC 793-1-A2
6. White 12. Aqua
Coating Geometry EIA/TIA-455-173 or
EIA/TIA-455-163 IEC 793-1-A2
Coating Strip Force EIA/TIA-455-178 *
Proof Test EIA/TIA-455-31 IEC 793-1-B1
Fiber Curl EIA/TIA-455-111 *
Length EIA/TIA-455-60 IEC 793-1-C1C
Operating Temperature Range EIA/TIA-455-69 * D-LUX® is a registered trademark of Lucent
Technologies
Temperature Cycling EIA/TIA-455-3 IEC 793-1-D1
Come visit our Web site at www.lucent.com/
Temperature/Humidity Cycling EIA/TIA-455-72 & -73 *
The specifications stated herein apply to Lucent
Fluid Immersion EIA/TIA-455-72 & -73 * Technologies optical fiber in its uncabled form.
Although many of these requirements apply to
High Temperature Aging EIA/TIA-455-67 & -70 * cabled fiber, some characteristics may change as
a result of the cabling process.
Dynamic Fatigue EIA/TIA-455-76 *
Lucent technologies reserves the right to make
Static Fatigue EIA/TIA-455-97 * changes to the product(s) described in this
document in the interest of improving internal
* There is currently no equivalent IEC test procedure for this parameter. design, operational function, and/or reliability.
Lucent Technologies does not assume any liability
Ordering Information which may occur due to the use or application of
the product(s) or circuit layout(s) described herein.

Fiber Type: Lucent Technologies 62.5 Micron Multimode Fiber This document is for planning purposes only and
is not intended to modify or supplement any
Coating: D-LUX Coating Series specifications or warranties relating to Lucent
Technologies products and services.
Attenuation: 850 nm maximum dB/km
1300 nm maximum dB/km Copyright © 1996 Lucent Technologies
All Rights Reserved.
Bandwidth: 850 nm minimum MHz-km Printed in USA

1300 nm minimum MHz-km

Lucent Technologies
Marketing
Length: meters 3588FS– Issue 3 LLC 6/96
Proof Test Level: kpsi
Number/Color of Spools: # spools