5 kW near single mode output of narrow linewidth laser with simple MOPA structure

Tian Xin; Rao Binyu; Wang Meng; Wang Chongwei; Xi Xiaoming; Yuan Weiyi; Li Zhixian; Li Hao; Chen Zilun; Pan Zhiyong; Wang Xiaolin; Ma Pengfei; Wang Zefeng; Chen Jinbao

doi:10.11884/HPLPB202234.220267

Volume 34 Issue 12

Nov. 2022

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Article Navigation > High Power Laser and Particle Beams > 2022 > 34(12): 121002

Tian Xin, Rao Binyu, Wang Meng, et al. 5 kW near single mode output of narrow linewidth laser with simple MOPA structure[J]. High Power Laser and Particle Beams, 2022, 34: 121002. doi: 10.11884/HPLPB202234.220267

Citation:

Tian Xin, Rao Binyu, Wang Meng, et al. 5 kW near single mode output of narrow linewidth laser with simple MOPA structure[J]. High Power Laser and Particle Beams, 2022, 34: 121002. doi: 10.11884/HPLPB202234.220267

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5 kW near single mode output of narrow linewidth laser with simple MOPA structure

doi: 10.11884/HPLPB202234.220267

College of Advanced Interdisciplinary Studies, Nanhu Laser Laboratory, Hunan Provincial Key Laboratory of High EnergyLaser Technology, National University of Defense Technology, Changsha 410073, China

Received Date: 2022-08-29
Rev Recd Date: 2022-10-11

Available Online: 2022-11-07

Publish Date: 2022-11-02

Abstract

Abstract

High-power narrow-linewidth fiber lasers are highly desired for nonlinear frequency conversion, spectral combination, and coherent combination. In this work, a 5 kW near single mode narrow-linewidth fiber laser system is established based on a composite fiber oscillator seed. By optimizing temporal characteristic of seed and structure of amplifier, the stimulated Raman scattering, spectral broadening, and transverse mode instability effects are suppressed comprehensively. Consequently, the output power is scaled up to 5 kW with a slope efficiency as high as approximately 86.1%. The peak signal to noise ratio is about 28.3 dB compared with the Raman Stokes light. The 3 dB and 20 dB linewidths are 0.48 nm and 2.1 nm, respectively. The beam quality (M² factor) is about 1.35. This work shows a amplification potential of narrow-linewidth fiber lasers based on such a simple structure.
- high power,
- fiber laser,
- narrow linewidth,
- master oscillator power amplifier

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References(9)

References

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