Design of optical axis jitter control system for multi beam lasers based on FPGA

Long Ou; Guohui Li; Chuanlin Xie; Zhiqiang Zhou

doi:10.1117/12.2315082

20 February 2018 Design of optical axis jitter control system for multi beam lasers based on FPGA

Long Ou, Guohui Li, Chuanlin Xie, Zhiqiang Zhou

Proceedings Volume 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application; 106973A (2018) https://doi.org/10.1117/12.2315082
Event: Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 2017, Nanjing, China

Abstract

A design of optical axis closed-loop control system for multi beam lasers coherent combining based on FPGA was introduced. The system uses piezoelectric ceramics Fast Steering Mirrors (FSM) as actuator, the Fairfield spot detection of multi beam lasers by the high speed CMOS camera for optical detecting, a control system based on FPGA for real-time optical axis jitter suppression. The algorithm for optical axis centroid detecting and PID of anti-Integral saturation were realized by FPGA. Optimize the structure of logic circuit by reuse resource and pipeline, as a result of reducing logic resource but reduced the delay time, and the closed-loop bandwidth increases to 100Hz. The jitter of laser less than 40Hz was reduced 40dB. The cost of the system is low but it works stably.

Citation Download Citation

Long Ou, Guohui Li, Chuanlin Xie, and Zhiqiang Zhou "Design of optical axis jitter control system for multi beam lasers based on FPGA", Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 106973A (20 February 2018); https://doi.org/10.1117/12.2315082

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