1.9W single-frequency, grating external-cavity tapered laser with narrow linewidth

Qian Li; Min Wan; Yan-hua Lu; Xiao-ming Chen; Huai-jin Ren; Hao Tan; Xia-fei Xu; Yi Li

doi:10.1117/12.2533883

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17 May 2019 1.9W single-frequency, grating external-cavity tapered laser with narrow linewidth

Qian Li, Min Wan, Yan-hua Lu, Xiao-ming Chen, Huai-jin Ren, Hao Tan, Xia-fei Xu, Yi Li

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Proceedings Volume 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019); 1117033 (2019) https://doi.org/10.1117/12.2533883
Event: Fourteenth National Conference on Laser Technology and Optoelectronics, 2019, Shanghai, China

Abstract

A high-power tunable Littrow grating external-cavity tapered semiconductor laser is designed in this paper. By using the grating external cavity to lock the wavelength and narrow the linewidth, we gained a series of single-frequency laser with the central wavelength at 927 nm, tunable range >20nm and linewidth < 980 fm with the continuous pumping. When the wavelength is 926.8 nm, the threshold current is 1.25A and the oblique efficiency is 0.682 W/A. When the injection current increases to 4A, the maximum output power is up to 1.906W, with the electro-optic efficiency of 21.7%, the linewidth of 700fm, and the beam quality of 1.948 and 3.788 in the fast and slow axis respectively.

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Qian Li, Min Wan, Yan-hua Lu, Xiao-ming Chen, Huai-jin Ren, Hao Tan, Xia-fei Xu, and Yi Li "1.9W single-frequency, grating external-cavity tapered laser with narrow linewidth", Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 1117033 (17 May 2019); https://doi.org/10.1117/12.2533883

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