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

Po-Ju Chen; Philip Engel; Grigory Lazarev; Adam Mazur; H. Paul Urbach

doi:10.1117/12.2506825

1 March 2019 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

Po-Ju Chen, Philip Engel, Grigory Lazarev, Adam Mazur, H. Paul Urbach

Author Affiliations +

Proceedings Volume 10941, Emerging Liquid Crystal Technologies XIV; 109410E (2019) https://doi.org/10.1117/12.2506825
Event: SPIE OPTO, 2019, San Francisco, California, United States

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.

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Po-Ju Chen, Philip Engel, Grigory Lazarev, Adam Mazur, and H. Paul Urbach "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", Proc. SPIE 10941, Emerging Liquid Crystal Technologies XIV, 109410E (1 March 2019); https://doi.org/10.1117/12.2506825

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