Power of all-fiber amplifier increasing from 1030 W to 2280 W through suppressing mode instability by increasing the seed power

doi:10.1088/1674-1056/28/2/024208

中国物理B ›› 2019, Vol. 28 ›› Issue (2): 24208-024208.doi: 10.1088/1674-1056/28/2/024208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Power of all-fiber amplifier increasing from 1030 W to 2280 W through suppressing mode instability by increasing the seed power

Xue-Xue Luo(罗雪雪), Ru-Mao Tao(陶汝茂), Chen Shi(史尘), Han-Wei Zhang(张汉伟), Xiao-Lin Wang(王小林), Pu Zhou(周朴), Xiao-Jun Xu(许晓军)

1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
2 Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, China;
3 Hunan Provincial Collaborative Innovation Center of High Power Fiber Laser, Changsha 410073, China

收稿日期:2018-09-10 修回日期:2018-10-25 出版日期:2019-02-05 发布日期:2019-02-05
通讯作者: Ru-Mao Tao, Xiao-Lin Wang E-mail:taorumao@sohu.com;chinawxllin@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61735007 and 61505260).

Power of all-fiber amplifier increasing from 1030 W to 2280 W through suppressing mode instability by increasing the seed power

Xue-Xue Luo(罗雪雪)¹, Ru-Mao Tao(陶汝茂)^1,2,3, Chen Shi(史尘)^1,2,3, Han-Wei Zhang(张汉伟)^1,2,3, Xiao-Lin Wang(王小林)^1,2,3, Pu Zhou(周朴)^1,2,3, Xiao-Jun Xu(许晓军)^1,2,3

1 College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
2 Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha 410073, China;
3 Hunan Provincial Collaborative Innovation Center of High Power Fiber Laser, Changsha 410073, China

Received:2018-09-10 Revised:2018-10-25 Online:2019-02-05 Published:2019-02-05
Contact: Ru-Mao Tao, Xiao-Lin Wang E-mail:taorumao@sohu.com;chinawxllin@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61735007 and 61505260).

摘要/Abstract

摘要：

In this work, we investigate suppressing mode instability in detail by varying the seed power in a large mode area all-fiber amplifier with a fiber core diameter of 25 μm. The transverse mode instability (TMI) thresholds are systematically measured for different seed power. Our experimental results reveal that increasing the seed power has a positive influence on enhancing the output power before the TMI effect appears, and finally the TMI threshold is approximately doubled from 1030 W to 2280 W when the seed power is increased from 27 W to 875 W. Almost 84.7% slope efficiency is reached with different seed power before the TMI threshold power. During our operation, we also find that in this type of LMA fiber the beam quality of the amplifier is degraded gradually instead of a sudden change as the pump power increases.

关键词: mode instabilities, seed power, coupling efficient, beam quality degradation

Abstract:

Key words: mode instabilities, seed power, coupling efficient, beam quality degradation

中图分类号: (Fiber lasers)

42.55.Wd

42.55.Xi (Diode-pumped lasers) 42.65.Es (Stimulated Brillouin and Rayleigh scattering)

罗雪雪, 陶汝茂, 史尘, 张汉伟, 王小林, 周朴, 许晓军. Power of all-fiber amplifier increasing from 1030 W to 2280 W through suppressing mode instability by increasing the seed power[J]. 中国物理B, 2019, 28(2): 24208-024208.

Xue-Xue Luo(罗雪雪), Ru-Mao Tao(陶汝茂), Chen Shi(史尘), Han-Wei Zhang(张汉伟), Xiao-Lin Wang(王小林), Pu Zhou(周朴), Xiao-Jun Xu(许晓军). Power of all-fiber amplifier increasing from 1030 W to 2280 W through suppressing mode instability by increasing the seed power[J]. Chin. Phys. B, 2019, 28(2): 24208-024208.

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Power of all-fiber amplifier increasing from 1030 W to 2280 W through suppressing mode instability by increasing the seed power

Power of all-fiber amplifier increasing from 1030 W to 2280 W through suppressing mode instability by increasing the seed power

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