High Power Laser and Particle Beams, Volume. 36, Issue 6, 061001(2024)
Progress in active phase control for large-scale coherent laser beam combining
Fig. 2. Principle of phase measurement by inclined interference[38]
Fig. 3. (a) Array structure and interference fringe pattern and (b) experiment results of interference-based coherent beam combining of 61 femtosecond fiber lasers[42]
Fig. 4. (a) System setup and (b) experiment results in interference-based coherent beam combining of 1 027 channels[44]
Fig. 6. Normalized intensity in open- and closed-loop of SPGD-based 61-channel coherent beam combining
Fig. 8. Diagram of coherent beam combining system based on multi-dithering method
Fig. 9. Intensity comparison before and after control and closed-loop phase residual in 32-channel multi-dithering coherent beam combining[78]
Fig. 10. (a) Experiment setup and (b) phase-locking rising time of 19-channel coherent beam combining based on high-speed multi-dithering method. (c) Bandwidth evaluation system and (d) bandwidth test result of the phase control circuit
Fig. 11. 2×4 coherent beam combining based on cascaded multi-dithering method[86]
Fig. 13. PIM coherent beam combining of 37-channel fiber amplifiers[89]
Fig. 15. DOE transmission function and intensity profile in simulation and experiment of 81-channel DOE coherent beam combining based on PIM[92]
Fig. 17. System setup and convergence curves of 100-channel CBC by quasi-reinforcement learning[100]
Fig. 18. 81-channel coherent beam combining based on neural network algorithm[120]
Fig. 19. (a) Convergence curve of 7-channel coherent beam combining under different initial conditions and (b) convergence time versus element number by CNN and SPGD[122]
Fig. 20. Convergence curves of phase control by DDRM algorithm[124]
Fig. 21. Prediction errors and their statistic distribution for various true phases as CNN trained by (a) traditional and (b) periodical loss function[125]
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Hongbing Zhou, Haoyu Zhang, Min Li, Xi Feng, Lianghua Xie, Yu Liu, Qiuhui Chu, Yuefang Yan, Rumao Tao, Honghuan Lin, Jianjun Wang, Lixin Yan, Feng Jing. Progress in active phase control for large-scale coherent laser beam combining[J]. High Power Laser and Particle Beams, 2024, 36(6): 061001
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Received: Dec. 1, 2023
Accepted: Mar. 11, 2024
Published Online: Jun. 3, 2024
The Author Email: Tao Rumao (supertaozhi@163.com)