Sub-µrad laser beam tracking

Ivo Buske; Wolfgang Riede

doi:10.1117/12.690424

5 October 2006 Sub-μrad laser beam tracking

Ivo Buske, Wolfgang Riede

Proceedings Volume 6397, Technologies for Optical Countermeasures III; 63970J (2006) https://doi.org/10.1117/12.690424
Event: Optics/Photonics in Security and Defence, 2006, Stockholm, Sweden

Abstract

We compare active optical elements based on different technologies to accomplish the requirements of a 2-dim. fine tracking control system. A cascaded optically and electrically addressable spatial light modulator (OASLM) based on liquid crystals (LC) is used for refractive beam steering. Spatial light modulators provide a controllable phase wedge to generate a beam deflection. Additionally, a tip/tilt mirror approach operating with piezo-electric actuators is investigated. A digital PID controller is implemented for closed-loop control. Beam tracking with a root-mean-squared accuracy of Δα=30 nrad has been laboratory-confirmed.

Citation Download Citation

Ivo Buske and Wolfgang Riede "Sub-μrad laser beam tracking", Proc. SPIE 6397, Technologies for Optical Countermeasures III, 63970J (5 October 2006); https://doi.org/10.1117/12.690424

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