SU Peng,GAO Xin,ZHANG Yue,et al.High Power 970 nm Semiconductor Laser With A Tunable Grating External Cavity[J].Chinese Journal of Luminescence,2023,44(04):664-672.
SU Peng,GAO Xin,ZHANG Yue,et al.High Power 970 nm Semiconductor Laser With A Tunable Grating External Cavity[J].Chinese Journal of Luminescence,2023,44(04):664-672. DOI: 10.37188/CJL.20220354.
High Power 970 nm Semiconductor Laser With A Tunable Grating External Cavity增强出版
Broad-area stripe semiconductor lasers are widely used in laser pumping, laser processing and other fields. In order to solve the problems of wide output spectrum and small tuning range of broad-area stripe semiconductor lasers, reflective diffraction grating with diffraction efficiency of 28% and 55% was used as a feedback element to construct a broad-area 970 nm semiconductor laser with a grating external cavity. The effect of the parameters of semiconductor laser with a grating external cavity in Littrow configuration on its performance (tuning range, power, threshold current, linewidth) was investigated. The experimental results show that the tunable laser output with narrow linewidth can be obtained by optimizing the structure, the tuning range of the outer cavity laser can be increased by increasing the temperature appropriately, the tuning range of the outer cavity laser can be improved and the threshold current can be reduced by using a grating with higher diffraction efficiency. The maximum wavelength tuning range of semiconductor laser with a grating external cavity based on S-polarization is 27.87 nm, the spectral linewidth pressure is narrowed to 0.2 nm, and the output power can reach 1.11 W.
关键词
半导体激光器衍射光栅波长调谐阈值电流
Keywords
semiconductor laserdiffraction gratingwavelength tuningthreshold current
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National Key Laboratory of High Power Semiconductor Lasers, Changchun University of Science and Technology
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
Key Laboratory of High Power Semiconductor Lasers, School of Physics, Changchun University of Science and Technology
State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences
College of Physics and Electronic Engineering, Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Hainan Normal University