Adaptive control of a MEMS steering mirror for free-space laser communications

Nestor O. Perez Arancibia; Neil Chen; Steve Gibson; Tsu-Chin Tsao

doi:10.1117/12.619586

12 September 2005 Adaptive control of a MEMS steering mirror for free-space laser communications

Nestor O. Perez Arancibia, Neil Chen, Steve Gibson, Tsu-Chin Tsao

Proceedings Volume 5892, Free-Space Laser Communications V; 589210 (2005) https://doi.org/10.1117/12.619586
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

Citation Download Citation

Nestor O. Perez Arancibia, Neil Chen, Steve Gibson, and Tsu-Chin Tsao "Adaptive control of a MEMS steering mirror for free-space laser communications", Proc. SPIE 5892, Free-Space Laser Communications V, 589210 (12 September 2005); https://doi.org/10.1117/12.619586

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