Volume 35 Issue 4
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Article Navigation >  High Power Laser and Particle Beams  > 2023  >  35(4): 041010
Zhang Haoran, Zeng Qin, Chen Chong, et al. Testing and analysis of coupled program of MCNP and FISPACT[J]. High Power Laser and Particle Beams, 2017, 29: 036025. doi: 10.11884/HPLPB201729.160424
Citation: Peng Yingnan, Hu Qiqi, Duan Jiazhu, et al. Self-adaptiue tilt control method based on second order moment of beam for laser array[J]. High Power Laser and Particle Beams, 2023, 35: 041010. doi: 10.11884/HPLPB202335.220312
shu

Self-adaptiue tilt control method based on second order moment of beam for laser array

doi: 10.11884/HPLPB202335.220312

  • Institute of Fluid Physics, CAEP, Mianyang 621900, China

  • Received Date: 2022-09-29
  • Accepted Date: 2023-01-02
  • Rev Recd Date: 2022-11-18
    • Available Online: 2023-01-05
  • Publish Date: 2023-03-30
    Abstract
  • Aiming at the problem of tilt control in coherent beam combining of laser array, a tilt control method, of which the evaluation function is based on second order moment of combined laser beam, is proposed. The performances of the tilt control method are investigated theoretically and experimentally. In the theoretical study, adopting the second order moment of the combined beam as the evaluation function, the tilt control process of 7 laser beam is simulated based on stochastic parallel gradient descent algorithm. In the experiments, a coherent beam combining system of 7-channel fiber array is built and an adaptive fiber collimator is used as the tilt-control device. Adopting the stochastic parallel gradient descent algorithm, the closed-loop operation of tilt control is achieved with the second order moment of the combined spot as the evaluation function. The theoretical and experimental results show that the tilt control method based on the second order moment of laser beam has great potential on coherent beam combination.
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    • References(17)
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