8.74 kW (8+1) GT-wave fiber amplifier

Lin Aoxiang; Zhan Huan; Wang Yuying; Peng Kun; Wang Xiaolong; Ni Li; Tang Xuan; Liu Shuang; Li Yuwei; Jiang Lei; Yu Juan; Wang Jianjun; Jing Feng

doi:10.11884/HPLPB201830.170466

Volume 30 Issue 1

Jan. 2018

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Article Navigation > High Power Laser and Particle Beams > 2018 > 30(1): 010101

Xu Chunyan, Zhan Guowei, Qing Chun, et al. Estimation and measurement of optical turbulence over land and offshore[J]. High Power Laser and Particle Beams, 2018, 30: 021003. doi: 10.11884/HPLPB201830.170296

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Lin Aoxiang, Zhan Huan, Wang Yuying, et al. 8.74 kW (8+1) GT-wave fiber amplifier[J]. High Power Laser and Particle Beams, 2018, 30: 010101. doi: 10.11884/HPLPB201830.170466

Citation:

Lin Aoxiang, Zhan Huan, Wang Yuying, et al. 8.74 kW (8+1) GT-wave fiber amplifier[J]. High Power Laser and Particle Beams, 2018, 30: 010101. doi: 10.11884/HPLPB201830.170466

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8.74 kW (8+1) GT-wave fiber amplifier

doi: 10.11884/HPLPB201830.170466

Research Center of Laser Fusion, CAEP, Mianyang 621900, China

Received Date: 2017-11-16
Rev Recd Date: 2017-11-29
Publish Date: 2018-01-15

Abstract

Abstract

A new-type of (8+1) GT-wave fiber was fabricated by our newly-optimized specialty fiber assembly and coating techniques for the first time. This (8+1) GT-wave fiber allowed for 10.66 kW aggregated pump power at 976 nm from 6 counter-pump-ports in a master oscillator power amplifier (MOPA) laser setup and stably presented 8.72 kW laser output at 1 079.4 nm with a high optical-to-optical efficiency of 81.0%. This is the highest power of the fiber amplifiers pumped by commercial laser diodes that has been reported so far, and only limited by the available pump power. Up to this power level, pure output spectrum with narrow 3 dB bandwidth Δλ_{3 dB} of 2.76 nm and without any sign of stimulated Raman scattering and amplified spontaneous emission was obtained. With other ten pump-ports to collect more pump power, a further power scaling towards 10 kW or above can be expected.

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