Optical beamsteering using an 8x8 MEMS phased array with closed-loop interferometric phase control

Optical beamsteering using an 8x8 MEMS phased array with closed-loop interferometric phase control

Authors

Trevor K. Chan1, Mischa Megens1, Byung-Wook Yoo2, John Wyras2, Connie J. Chang-Hasnain2, Ming C. Wu2 and David A. Horsley1

1Department of Mechanical and Aerospace Engineering, University of California, Davis, One Shields Ave., Davis, CA 95616, USA
2Department of Electrical and Computer Engineering, University of California, Berkeley, Cory Hall, Berkeley, CA 94720, USA

Abstract*

We present a high-speed optical beamsteering system based on an 8x8 MEMS phased array. The system incorporates an in-situ interferometer that provides a real-time, dynamic measure of the phase of each mirror in the array during beamsteering. A closed-loop phase-control algorithm results in <π/100 mirror phase accuracy and far field beam steering is shown. Stroboscopic measurement capabilities are demonstrated which allow us to show feedforward control to eliminate micromirror ringing.

©2012 Optical Society of America

*Remark
As this paper is already from 2012, it mentions the Bobcat-1.7-320-Gated. This camera has currently been replaced by the Bobcat-320-Gated, which has all the same features except the minimum exposure time is 100 nsec.

 

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