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高亮度半导体激光器无输出耦合镜光栅外腔光谱合束

High brightness diode laser by coupler free grating external cavity spectral beam combining

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摘要

宽面发射半导体激光器的光谱合束技术对发展高功率直接半导体激光光源具有重要意义。光栅外腔光谱合束基于光栅的波长选择特性和外腔半导体激光技术, 实现单个合束单元的光谱锁定和所有合束单元的合束输出, 输出光束质量与单个合束单元相当, 而亮度和功率得到很大的提高。基于无输出耦合镜光栅外腔光谱合束结构, 实现了单个半导体激光短阵列的光谱合束, 分析了光谱合束的输出光谱、输出功率和光束质量的特性, 获得了70 A工作电流下40.8 W的连续输出功率, 快轴和慢轴方向的光束质量分别为0.41 mm·mrad和9.16 mm·mrad(包含95%能量), 相应的电光转换效率为38.4%, 亮度高达67.90 MW/(cm2·sr)。

Abstract

Spectral beam combining of a broad area diode laser is a promising technique for direct diode laser applications. Grating external cavity spectral beam combination bases on wavelength selection characteristics of the grating and external cavity diode laser technology to achieve the lock of the single emitter spectrum and the combination of all the sub beam combining elements into one output. The beam quality of the output is equivalent to a single beam combining element, and the brightness and power are greatly improved, simultaneously. Based on the coupler free grating external cavity structure, spectral beam combination of a single diode laser short array stripe was realized. The characteristics of spectrum, power and beam quality of the output beam were analyzed. At the pump current of 70 A, a continuous output power of 40.8 W was obtained. The fast and slow axis beam quality were 0.41 mm·mrad and 9.16 mm·mrad(including 95% energy) respectively, the corresponding electro-optic conversion efficiency was 38.4% and the brightness was up to 67.90 MW/(cm2·sr).

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中图分类号:TN24

DOI:10.3788/irla201948.0306006

所属栏目:激光技术及应用

基金项目:微/纳结构材料热物性表征仪器的开发和应用(2013YQ120355); 中国工程物理研究院高能激光科学与重点实验室基金课题(HEL2018-03)

收稿日期:2018-10-11

修改稿日期:2018-11-13

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孙舒娟:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院高能激光科学与技术重点实验室, 四川 绵阳 621900中国工程物理研究院研究生部, 北京 100088
谭 昊:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院高能激光科学与技术重点实验室, 四川 绵阳 621900
孟慧成:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院高能激光科学与技术重点实验室, 四川 绵阳 621900
郭林辉:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院高能激光科学与技术重点实验室, 四川 绵阳 621900
高松信:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院高能激光科学与技术重点实验室, 四川 绵阳 621900
武德勇:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院高能激光科学与技术重点实验室, 四川 绵阳 621900
许 放:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院高能激光科学与技术重点实验室, 四川 绵阳 621900中国工程物理研究院研究生部, 北京 100088

联系人作者:孙舒娟(shujuan0807@163.com)

备注:孙舒娟(1991-), 女, 硕士生, 主要从事半导体激光器合束技术方面的研究。

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引用该论文

Sun Shujuan,Tan Hao,Meng Huicheng,Guo Linhui,Gao Songxin,Wu Deyong,Xu Fang. High brightness diode laser by coupler free grating external cavity spectral beam combining[J]. Infrared and Laser Engineering, 2019, 48(3): 0306006

孙舒娟,谭 昊,孟慧成,郭林辉,高松信,武德勇,许 放. 高亮度半导体激光器无输出耦合镜光栅外腔光谱合束[J]. 红外与激光工程, 2019, 48(3): 0306006

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