Analysis of diffraction efficiency of TI-PLM and its potential in beam steering

Chuan Luo; Jiafan Guan; Xianyue Deng; Yuzuru Takashima

doi:10.1117/12.2596485

7 September 2021 Analysis of diffraction efficiency of TI-PLM and its potential in beam steering

Chuan Luo, Jiafan Guan, Xianyue Deng, Yuzuru Takashima

Proceedings Volume 11828, ODS 2021: Industrial Optical Devices and Systems; 1182809 (2021) https://doi.org/10.1117/12.2596485
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

A concept of Texas Instrument (TI)-Phase-only Spatial Light Modulator (PLM) is reported which utilizing the dynamic piston motion of PLM pixels to form a discretized blazed grating. By fully manipulating the piston motion of pixels and increasing the available discretization level of the quasi-blazed grating, the Diffraction Efficiency (DE) can achieve close to 99%, which qualifies PLM an ideal candidate for beam steering functionality combining with its MEMS based high refresh rate and large aperture. The DE of the discretized blazed grating is proven to have 86% with 633 nm monochromatic light incident at 25° with 16 discretization levels and 2𝜋 round-trip phase modulation by RCWA algorithm. Furthermore, additional factors which lead to the degradation of diffraction efficiency is also analyzed.

Conference Presentation

Citation Download Citation

Chuan Luo, Jiafan Guan, Xianyue Deng, and Yuzuru Takashima "Analysis of diffraction efficiency of TI-PLM and its potential in beam steering", Proc. SPIE 11828, ODS 2021: Industrial Optical Devices and Systems, 1182809 (7 September 2021); https://doi.org/10.1117/12.2596485

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