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

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationProceedings of SPIE
Subtitle of host publicationEmerging Liquid Crystal Technologies XIV
EditorsLiang-Chy Chien, Dirk J. Broer, Igor Musevic, Byoungho Lee
PublisherSPIE
Number of pages8
Volume10941
ISBN (Electronic)978-151062524-2
DOIs
Publication statusPublished - 2019
EventEmerging Liquid Crystal Technologies XIV 2019 - San Francisco, United States
Duration: 3 Feb 20195 Feb 2019

Publication series

NameEMERGING LIQUID CRYSTAL TECHNOLOGIES XIV
ISSN (Print)0277-786X

Conference

ConferenceEmerging Liquid Crystal Technologies XIV 2019
CountryUnited States
CitySan Francisco
Period3/02/195/02/19

Keywords

  • beam steering
  • diractive optics
  • LCOS
  • Liquid Crystal on Silicon
  • Spatial light modulator

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