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基于20/400 μm增益光纤的3 kW近单模全光纤放大器及其长时工作特性

3 kW Near-Single-Mode All-Fiber Amplifier Based on 20/400 μm Gain Fiber and Its Long Time Operation Characteristics

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摘要

利用波长为976 nm的抽运源对基于纤芯/内包层直径为20/400 μm的增益光纤放大器进行双向抽运,通过优化光纤弯曲半径,合理选择抽运方式并优化抽运功率配比,可有效抑制横向模式不稳定效应和受激拉曼散射,获得了输出功率大于3 kW的近单模全光纤放大器。光纤放大器的光-光转换效率约为73%,受激拉曼散射抑制比为20 dB,光束质量因子小于1.7,时/频域上没有出现模式不稳定现象。对该放大器进行10 h的连续测试,结果表明,该激光器性能稳定,有望用于工业加工等领域。

Abstract

The 976 nm laser diodes are utilized to provide the bi-directional pumping sources for the fiber amplifier based on 20/400 μm gain fiber. The transverse mode instability and the stimulated Raman scattering (SRS) effects are effectively suppressed under the operation of optimizing the coiling bending of gain fiber, pumping method, and pumping power distribution. A 3 kW level all-fiber amplifier with near-single-mode output is finally achieved. The optical-to-optical efficiency is around 73%, the SRS rejection ratio is 20 dB, and the beam quality factor is below 1.7. There are no mode instability characteristics detected in the time/frequency domain. A continuous 10 h test of this amplifier is carried out and the results show that the amplifier is stable, and is possible for its application in areas such as industrial processes.

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中图分类号:O436

DOI:10.3788/CJL201946.0201004

所属栏目:激光器件与激光物理

基金项目:国家自然科学基金(61505260,61735007)

收稿日期:2018-09-27

修改稿日期:2018-10-29

网络出版日期:2018-11-19

作者单位    点击查看

罗雪雪:国防科技大学前沿交叉学科学院, 湖南 长沙 410073
奚小明:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073
史尘:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073
王小林:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073
张汉伟:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073
陶汝茂:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073
韩凯:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073
周朴:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073
许晓军:国防科技大学前沿交叉学科学院, 湖南 长沙 410073脉冲功率激光技术国家重点实验室, 湖南 长沙 410073高能激光技术湖南省重点实验室, 湖南 长沙 410073

联系人作者:奚小明(exixiaoming@163.com); 王小林(chinawxllin@163.com);

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引用该论文

Luo Xuexue,Xi Xiaoming,Shi Chen,Wang Xiaolin,Zhang Hanwei,Tao Rumao,Han Kai,Zhou Pu,Xu Xiaojun. 3 kW Near-Single-Mode All-Fiber Amplifier Based on 20/400 μm Gain Fiber and Its Long Time Operation Characteristics[J]. Chinese Journal of Lasers, 2019, 46(2): 0201004

罗雪雪,奚小明,史尘,王小林,张汉伟,陶汝茂,韩凯,周朴,许晓军. 基于20/400 μm增益光纤的3 kW近单模全光纤放大器及其长时工作特性[J]. 中国激光, 2019, 46(2): 0201004

被引情况

【1】陈毛妮,曹涧秋,黄值河,陈金宝. 980nm波段连续光纤激光器的研究进展. 中国激光, 2021, 48(4): 401013--1

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