A pulsed 1720 nm Tm-doped fiber laser based on dual-cavity scheme

Lu Zhang; Junxiang Zhang; Quan Sheng; Chaodu Shi; Shijie Fu; Wei Shi; Jianquan Yao

doi:10.1117/12.2609173

4 March 2022 A pulsed 1720 nm Tm-doped fiber laser based on dual-cavity scheme

Lu Zhang, Junxiang Zhang, Quan Sheng, Chaodu Shi, Shijie Fu, Wei Shi, Jianquan Yao

Proceedings Volume 11981, Fiber Lasers XIX: Technology and Systems; 119810U (2022) https://doi.org/10.1117/12.2609173
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

We propose and demonstrate a novel method to achieve pulsed operation of thulium-doped fiber lasers at 1.7 μm. In our design, the thulium-doped fiber laser cavity was embedded within the cavity of an erbium/ytterbium-codoped fiber laser operating at 1.5 μm. The thulium-doped fiber in the erbium/ytterbium-codoped fiber laser cavity served as a saturable absorber, forcing the 1.5 μm laser to operate in a passively Q-switched scheme. The 1.7 μm thulium-doped fiber laser was in-turn pumped by the Q-switched 1.5 μm laser and was gain-switched. This resulted in the pulse duration of 1.7 μm emission was much shorter than that of 1.5 μm emission. 1.02 W average output power at 1720 nm was obtained for 10 W of pump power at 976 nm. The pulse repetition frequency, pulse energy and pulse duration were 134 kHz, 7.6 μJ and 102 ns, respectively.

Conference Presentation

Citation Download Citation

Lu Zhang, Junxiang Zhang, Quan Sheng, Chaodu Shi, Shijie Fu, Wei Shi, and Jianquan Yao "A pulsed 1720 nm Tm-doped fiber laser based on dual-cavity scheme", Proc. SPIE 11981, Fiber Lasers XIX: Technology and Systems, 119810U (4 March 2022); https://doi.org/10.1117/12.2609173

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