Optical Enhancement of Diffraction Efficiency of Texas Instruments Phase Light Modulator for Beam Steering in Near Infrared

Jiafan Guan; Zhipeng Dong; Xianyue Deng; Yuzuru Takashima

doi:10.3390/mi13091393

Optical Enhancement of Diffraction Efficiency of Texas Instruments Phase Light Modulator for Beam Steering in Near Infrared

Jiafan Guan, Zhipeng Dong, Xianyue Deng, Yuzuru Takashima

Optical Sciences

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Phase light modulator (PLM) by MEMS mirror array operating in a piston-mode motion enables a high-speed diffractive beam steering in a random-access and flexible manner that makes a lidar system more intelligent and adaptive. Diffraction efficiency is determined by the range of the piston motion of the MEMS array; consequently, a larger range of the piston motion is required for beam steering in infrared, such as for lidar. We demonstrated how the range of the piston motion is optically enhanced by a factor of two with a light-recycling optics based on Talbot self-imaging. The proposed optical architecture extends the usable range of the wavelength so that a MEMS-PLM designed for visible wavelength is applicable for a high-efficiency beam steering at an infrared wavelength of 1550 nm with an improved diffraction efficiency of 30%.

Original language	English (US)
Article number	1393
Journal	Micromachines
Volume	13
Issue number	9
DOIs	https://doi.org/10.3390/mi13091393
State	Published - Sep 2022

Keywords

LiDAR
MEMS
Talbot image
beam steering
computer-generated hologram (CGH)
phase light modulator (PLM)

ASJC Scopus subject areas

Control and Systems Engineering
Mechanical Engineering
Electrical and Electronic Engineering

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10.3390/mi13091393

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@article{a83a2f5f7bd84038b9b8aea7ea73e337,

title = "Optical Enhancement of Diffraction Efficiency of Texas Instruments Phase Light Modulator for Beam Steering in Near Infrared",

abstract = "Phase light modulator (PLM) by MEMS mirror array operating in a piston-mode motion enables a high-speed diffractive beam steering in a random-access and flexible manner that makes a lidar system more intelligent and adaptive. Diffraction efficiency is determined by the range of the piston motion of the MEMS array; consequently, a larger range of the piston motion is required for beam steering in infrared, such as for lidar. We demonstrated how the range of the piston motion is optically enhanced by a factor of two with a light-recycling optics based on Talbot self-imaging. The proposed optical architecture extends the usable range of the wavelength so that a MEMS-PLM designed for visible wavelength is applicable for a high-efficiency beam steering at an infrared wavelength of 1550 nm with an improved diffraction efficiency of 30%.",

keywords = "LiDAR, MEMS, Talbot image, beam steering, computer-generated hologram (CGH), phase light modulator (PLM)",

author = "Jiafan Guan and Zhipeng Dong and Xianyue Deng and Yuzuru Takashima",

note = "Funding Information: We gratefully acknowledge that this research was funded by the Semiconductor Research Corporation, Texas Instruments, and Mitsubishi Electric. Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

month = sep,

doi = "10.3390/mi13091393",

language = "English (US)",

volume = "13",

journal = "Micromachines",

issn = "2072-666X",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "9",

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T1 - Optical Enhancement of Diffraction Efficiency of Texas Instruments Phase Light Modulator for Beam Steering in Near Infrared

AU - Guan, Jiafan

AU - Dong, Zhipeng

AU - Deng, Xianyue

AU - Takashima, Yuzuru

N1 - Funding Information: We gratefully acknowledge that this research was funded by the Semiconductor Research Corporation, Texas Instruments, and Mitsubishi Electric. Publisher Copyright: © 2022 by the authors.

PY - 2022/9

Y1 - 2022/9

N2 - Phase light modulator (PLM) by MEMS mirror array operating in a piston-mode motion enables a high-speed diffractive beam steering in a random-access and flexible manner that makes a lidar system more intelligent and adaptive. Diffraction efficiency is determined by the range of the piston motion of the MEMS array; consequently, a larger range of the piston motion is required for beam steering in infrared, such as for lidar. We demonstrated how the range of the piston motion is optically enhanced by a factor of two with a light-recycling optics based on Talbot self-imaging. The proposed optical architecture extends the usable range of the wavelength so that a MEMS-PLM designed for visible wavelength is applicable for a high-efficiency beam steering at an infrared wavelength of 1550 nm with an improved diffraction efficiency of 30%.

AB - Phase light modulator (PLM) by MEMS mirror array operating in a piston-mode motion enables a high-speed diffractive beam steering in a random-access and flexible manner that makes a lidar system more intelligent and adaptive. Diffraction efficiency is determined by the range of the piston motion of the MEMS array; consequently, a larger range of the piston motion is required for beam steering in infrared, such as for lidar. We demonstrated how the range of the piston motion is optically enhanced by a factor of two with a light-recycling optics based on Talbot self-imaging. The proposed optical architecture extends the usable range of the wavelength so that a MEMS-PLM designed for visible wavelength is applicable for a high-efficiency beam steering at an infrared wavelength of 1550 nm with an improved diffraction efficiency of 30%.

KW - LiDAR

KW - MEMS

KW - Talbot image

KW - beam steering

KW - computer-generated hologram (CGH)

KW - phase light modulator (PLM)

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Optical Enhancement of Diffraction Efficiency of Texas Instruments Phase Light Modulator for Beam Steering in Near Infrared

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Keywords

ASJC Scopus subject areas

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