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We present HoloChrome, a polychromatic holographic display framework designed to mitigate these limitations. HoloChrome utilizes an ultrafast, wavelength-adjustable laser and a dual-Spatial Light Modulator (SLM) architecture, enabling the multiplexing of a large set of discrete wavelengths across the visible spectrum. By leveraging spatial separation in our dual-SLM setup, we independently manipulate speckle patterns across multiple wavelengths. This novel approach effectively reduces speckle noise through incoherent averaging achieved by wavelength multiplexing, specifically by using a single SLM pattern to modulate multiple wavelengths simultaneously on one or more SLM devices. Our method is complementary to existing speckle reduction techniques, offering a new pathway to address this challenge. Furthermore, the use of polychromatic illumination broadens the achievable color gamut compared to traditional three-color primary holographic displays.<\/jats:p>\n          <jats:p>Our simulations and tabletop experiments validate that HoloChrome significantly reduces speckle noise and expands the color gamut. These advancements enhance the performance of holographic near-eye displays, moving us closer to practical, immersive next-generation visual experiences.<\/jats:p>","DOI":"10.1145\/3732935","type":"journal-article","created":{"date-parts":[[2025,4,28]],"date-time":"2025-04-28T10:55:16Z","timestamp":1745837716000},"page":"1-18","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["HoloChrome: Polychromatic Illumination for Speckle Reduction in Holographic Near-Eye Displays"],"prefix":"10.1145","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3959-5163","authenticated-orcid":false,"given":"Florian Andreas","family":"Schiffers","sequence":"first","affiliation":[{"name":"Northwestern University, Evanston, United States and Meta Reality Labs, Redmond, United States"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2556-1771","authenticated-orcid":false,"given":"Grace","family":"Kuo","sequence":"additional","affiliation":[{"name":"Meta Reality Labs, Redmond, United States"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-0697-7672","authenticated-orcid":false,"given":"Nathan","family":"Matsuda","sequence":"additional","affiliation":[{"name":"Meta Reality Labs, Redmond, United States"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2447-5652","authenticated-orcid":false,"given":"Douglas","family":"Lanman","sequence":"additional","affiliation":[{"name":"Meta Reality Labs, Redmond, United States"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0501-0163","authenticated-orcid":false,"given":"Oliver","family":"Cossairt","sequence":"additional","affiliation":[{"name":"Meta Reality Labs, Redmond, United States"}]}],"member":"320","published-online":{"date-parts":[[2025,5,9]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1109\/TVCG.2019.2898781"},{"key":"e_1_3_2_3_1","doi-asserted-by":"crossref","unstructured":"Kaan Aksit Koray Kavakli Liang Shi Hakan Urey and Wojciech Matusik. 2023. 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