Coherent combining of fiber laser based on internal phase locking in spatial structure

Long Jinhu; Su Rongtao; Chang Hongxiang; Hou Tianyue; Chang Qi; Jiang Min; Zhang Jiayi; Ma Yanxing; Ma Pengfei; Zhou Pu

doi:10.11884/HPLPB202335.220258

Volume 35 Issue 4

Mar. 2023

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Long Jinhu, Su Rongtao, Chang Hongxiang, et al. Coherent combining of fiber laser based on internal phase locking in spatial structure[J]. High Power Laser and Particle Beams, 2023, 35: 041008. doi: 10.11884/HPLPB202335.220258

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Long Jinhu, Su Rongtao, Chang Hongxiang, et al. Coherent combining of fiber laser based on internal phase locking in spatial structure[J]. High Power Laser and Particle Beams, 2023, 35: 041008. doi: 10.11884/HPLPB202335.220258

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Coherent combining of fiber laser based on internal phase locking in spatial structure

doi: 10.11884/HPLPB202335.220258

Long Jinhu^1
,,
Su Rongtao^{1, 2, 3
,
,},
Chang Hongxiang¹,
Hou Tianyue¹,
Chang Qi¹,
Jiang Min¹,
Zhang Jiayi¹,
Ma Yanxing^{1, 2, 3},
Ma Pengfei^{1, 2, 3},
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: 2022-11-17
Rev Recd Date: 2022-09-28

Available Online: 2022-11-18

Publish Date: 2023-03-30

Abstract

Abstract

This paper introduces our recent research on the coherently combined fiber laser based on spatial structure internal phase locking including the principle of spatial structure internal phase locking, and the experiment of 7-channel fiber laser array carried out to experimentally verify the feasibility of this technique. The detailed results indicate that when the phase noises in the laser channels are locked, the external phase differences an be compensated together, and the laser array can be locked with a same phase wavefront. In addition, the researches on the CBC of target in the loop (TIL) technique and constructing the light fields are introduced as well. In the experiment, the control bandwidth of the CBC system of TIL could be improved effectively, and the orbital angular momentum beams could be generated in the far field, the topological charge could be changed from −1 to +1.
- fiber laser,
- coherent beam combining,
- phase control,
- internal phase control,
- constructing light field

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References(91)

References

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