Research progress of active phase-locking technique of an all-fiber coherent laser array

Chang Hongxiang; Su Rongtao; Long Jinhu; Chang Qi; Ma Pengfei; Ma Yanxing; Zhou Pu

doi:10.11884/HPLPB202335.220259

Volume 35 Issue 4

Mar. 2023

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Article Navigation > High Power Laser and Particle Beams > 2023 > 35(4): 041004

Chang Hongxiang, Su Rongtao, Long Jinhu, et al. Research progress of active phase-locking technique of an all-fiber coherent laser array[J]. High Power Laser and Particle Beams, 2023, 35: 041004. doi: 10.11884/HPLPB202335.220259

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Chang Hongxiang, Su Rongtao, Long Jinhu, et al. Research progress of active phase-locking technique of an all-fiber coherent laser array[J]. High Power Laser and Particle Beams, 2023, 35: 041004. doi: 10.11884/HPLPB202335.220259

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Research progress of active phase-locking technique of an all-fiber coherent laser array

doi: 10.11884/HPLPB202335.220259

Chang Hongxiang^1
,,
Su Rongtao^{1, 2, 3},
Long Jinhu¹,
Chang Qi¹,
Ma Pengfei^{1, 2, 3},
Ma Yanxing¹,
Zhou Pu^{1
,
,}

1.
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
2.
Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China
3.
Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, China

Received Date: 2022-08-23
Accepted Date: 2022-11-09
Rev Recd Date: 2022-10-31

Available Online: 2022-11-11

Publish Date: 2023-03-30

Abstract

Abstract

The all-fiber laser array with active phase control uses an all-fiber network to realize internal detection and control of piston phases, which is one of the important development directions of large-scale fiber laser coherent beam combining. It has the advantages of compact structure, no external feedback optical elements and easy expansion. The phase detection based on an all-fiber structure is employed in this paper. The principles of the active phase control method of an all-fiber laser array and the phase-locking process by fiber couplers are introduced. Then, the key techniques are summarized, and the proof-of-concept experiments are carried out based on optimum algorithms. The issue of π phase ambiguity is discussed and the numerical simulation result is given by double wavelength detection. At last, the research status is introduced, and the prospects are presented from the perspectives of expansion, power enhancement and applications.
- fiber laser,
- all-fiber laser array,
- coherent beam combining,
- internal phase locking,
- optical fiber sensing

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References(65)

References

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