High-speed SPGD wavefront controller for an adaptive optics system without wavefront sensor

Caixia Wang; Xinyang Li; Mei Li; Jongwei Ye; Bo Chen

doi:10.1117/12.866011

22 October 2010 High-speed SPGD wavefront controller for an adaptive optics system without wavefront sensor

Caixia Wang, Xinyang Li, Mei Li, Jongwei Ye, Bo Chen

Proceedings Volume 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology; 76585T (2010) https://doi.org/10.1117/12.866011
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

A non-conventional adaptive optics system based on direct system performance metric optimization is illustrated. The system does not require wave-front sensor which is difficult to work under the poor condition such as beam cleanup for the anomalous light beam. The system comprises a high speed wavefront controller based on Stochastic Parallel Gradient Descent (SPGD) Algorithm, a deformable mirror, a tip/tilt mirror and a far-field system performance metric sensor. The architecture of the wave-front controller is based on a combination of Field Programmable Gate Array (FPGA) and floating-point Digital Signal Processor (DSP). The Zernike coefficient information is applied to improve the iteration speed. The experimental results show that the beam cleanup system based on SPGD keep a high iteration speed. The controller can compensate the wavefront aberration and tilt excursion effectively.

Citation Download Citation

Caixia Wang, Xinyang Li, Mei Li, Jongwei Ye, and Bo Chen "High-speed SPGD wavefront controller for an adaptive optics system without wavefront sensor", Proc. SPIE 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, 76585T (22 October 2010); https://doi.org/10.1117/12.866011

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