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Design, implementation, and study of the high-resolution high-efficiency liquid crystal on silicon spatial light modulator for the telecommunication application in the short-wave infrared spectral band
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Paper Abstract

There are many important applications for phase-only liquid crystal on Silicon-based spatial light modulators (LCOS SLMs). Among the applications, the diffractive beam splitting, beam shaping and beam steering with LCOS SLM are finding more and more use in telecommunication applications (e.g. wavelength selective switch for ROADM, space and mode division multiplexing). However, many effects of LCOS device have to be considered if we want to get high quality output light field. For example, the ideal phase, intensity and polarization distribution in far field are usually deteriorated by the pixelated metal structure and fringing field effects. Thus, the total efficiency is decreased. By using electro-optical and electromagnetic simulation methods, we can properly incorporate the effects that influence the optical performance of LCOS and optimize the design. Furthermore we report the implementation of the high-performance high-resolution LCOS SLM for the telecommunication C- and L-band with the average insertion loss (IL) of less than 0.2 dB, achieved by the reflectivity-enhancement coating on the LCOS backplane. The experimental results on reflectivity, diffraction efficiency, crosstalk and other important parameters are compared with the theoretical predictions.

Paper Details

Date Published: 1 March 2019
PDF: 8 pages
Proc. SPIE 10941, Emerging Liquid Crystal Technologies XIV, 109410E (1 March 2019); doi: 10.1117/12.2506825
Show Author Affiliations
Po-Ju Chen, HOLOEYE Photonics AG (Germany)
Technische Univ. Delft (Netherlands)
Philip Engel, HOLOEYE Photonics AG (Germany)
Grigory Lazarev, HOLOEYE Photonics AG (Germany)
Adam Mazur, HOLOEYE Photonics AG (Germany)
H. Paul Urbach, Technische Univ. Delft (Netherlands)

Published in SPIE Proceedings Vol. 10941:
Emerging Liquid Crystal Technologies XIV
Liang-Chy Chien, Editor(s)

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