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23 October 2007 A real-time sub-μrad laser beam tracking system
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Abstract
We present a rugged and reliable real-time laser beam tracking system operating with a high speed, high resolution piezo-electric tip/tilt mirror. Characteristics of the piezo mirror and position sensor are investigated. An industrial programmable automation controller is used to develop a real-time digital PID controller. The controller provides a one million field programmable gate array (FPGA) to realize a high closed-loop frequency of 50 kHz. Beam tracking with a root-mean-squared accuracy better than 0.15 μrad has been laboratory confirmed. The system is intended as an add-on module for established mechanical mrad tracking systems.
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Ivo Buske, Ralph Schragner, and Wolfgang Riede "A real-time sub-μrad laser beam tracking system", Proc. SPIE 6738, Technologies for Optical Countermeasures IV, 67380F (23 October 2007); https://doi.org/10.1117/12.735811
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