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Proceedings Paper

Adaptive control of a MEMS steering mirror for free-space laser communications
Author(s): Nestor O. Perez Arancibia; Neil Chen; Steve Gibson; Tsu-Chin Tsao
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Paper Abstract

This paper presents an adaptive control scheme for laser-beam steering by a two-axis MEMS tilt mirror used in current free-space optical communications systems. In the control scheme presented here, disturbances in the laser beam are rejected by a high-performance linear time-invariant feedback controller augmented by the adaptive control loop, which determines control gains that are optimal for the current disturbance acting on the laser beam. The variable-order adaptive control loop is based on an adaptive lattice filter that implicitly identifies the disturbance statistics from real-time sensor data. Experimental results are presented to demonstrate the effectiveness of the adaptive controller for rejecting multi-bandwidth jitter. These results demonstrate that the adaptive loop significantly extends the jitter-rejection bandwidth achieved by the feedback controller alone.

Paper Details

Date Published: 12 September 2005
PDF: 12 pages
Proc. SPIE 5892, Free-Space Laser Communications V, 589210 (12 September 2005); doi: 10.1117/12.619586
Show Author Affiliations
Nestor O. Perez Arancibia, Univ. of California/Los Angeles (United States)
Neil Chen, Univ. of California/Los Angeles (United States)
Steve Gibson, Univ. of California/Los Angeles (United States)
Tsu-Chin Tsao, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 5892:
Free-Space Laser Communications V
David G. Voelz; Jennifer C. Ricklin, Editor(s)

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