Acta Optica Sinica, Volume. 36, Issue 9, 906003(2016)
All Fiber Optical Path Difference Adaptive Control Method in Femtosecond Fiber Laser Coherent Polarization Beam Combination System
An all-fiber optical path difference adaptive control method is proposed, and it has been successfully applied to the femtosecond fiber laser coherent polarization combination system. Field programmable gate array (FPGA) control circuit is used as the hardware foundation in the establishment of the optical path difference adaptive control system, and an effective control algorithm is designed based on the hill-climbing algorithm, which can successfully solve the disturbance problem between optical path difference adaptive control and phase-locked control. The experimental results show that the system can completely compensate the optical path difference drift in the range of ±60λ with good continuous working stability, which can meet the requirements of optical path difference adaptive control in the femtosecond fiber laser coherent polarization combination system.
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Zhang Zhixin, Yu Hailong, Zhi Dong, Ma Yanxing, Wang Xiaolin, Zhou Pu, Si Lei. All Fiber Optical Path Difference Adaptive Control Method in Femtosecond Fiber Laser Coherent Polarization Beam Combination System[J]. Acta Optica Sinica, 2016, 36(9): 906003
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Received: Mar. 22, 2016
Accepted: --
Published Online: Sep. 9, 2016
The Author Email: Zhixin Zhang (chimwolf@163.com)