2 μm band pulsed all-PM thulium-doped fiber laser based on the acousto-optic Q-switching

Zhenxing He; Ting Yu; Jia Meng; Sijie Wang; Jing Liu; ChuanPeng Qian; Xiangchun Shi; Xisheng Ye

doi:10.1117/12.2586948

12 March 2021 2 μm band pulsed all-PM thulium-doped fiber laser based on the acousto-optic Q-switching

Zhenxing He, Ting Yu, Jia Meng, Sijie Wang, Jing Liu, ChuanPeng Qian, Xiangchun Shi, Xisheng Ye

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117634F (2021) https://doi.org/10.1117/12.2586948
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

We report a 2 μm band high power pulsed all-polarization maintaining (PM) thulium-doped fiber laser based on the acousto-optic q-switching technique. It is constructed in a two-stage master-oscillator power amplifier (MOPA) configuration. A Q-switched seed laser was composed of a homemade 1559 nm fiber laser, a pair of fiber Bragg gratings (FBGs) with central wavelength at 2009 nm, a piece of single-cladding thulium-doped fiber (TDF) and an acoustic-optical modulator (AOM). Using a two-stage amplifier seeded by an acousto-optic modulator modulated pulsed laser, We achieved the laser with a central wavelength of 2009.71 nm, and the laser has a 3 dB linewidth of 0.09nm and output power of approximately 2.04 W. Based on the acousto-optic switch, the pulse width of 97 ns at a repetition rate of 20 kHz was obtained. The maximum peak-power of the fiber power amplifier is 2.1 kW and pulse energy is more than 204 μJ. This high power thulium-doped fiber laser has an all-fiber based configuration. We used a cladding power stripper (CPS) with matched passive fiber to remove residual pump light that leaked into cladding. The slope efficiency of the thulium-doped fiber power amplifier was 22.7%.

Citation Download Citation

Zhenxing He, Ting Yu, Jia Meng, Sijie Wang, Jing Liu, ChuanPeng Qian, Xiangchun Shi, and Xisheng Ye "2 μm band pulsed all-PM thulium-doped fiber laser based on the acousto-optic Q-switching", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117634F (12 March 2021); https://doi.org/10.1117/12.2586948

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