Compact mid-infrared nanosecond pulsed fiber lasers based on novel saturable absorbers

Le Zheng; Chen Wei; Hongrong Zhou; Fanxi Sun; Ang Gao; Dongsheng Wang; Yong Liu

doi:10.1117/12.2608045

4 March 2022 Compact mid-infrared nanosecond pulsed fiber lasers based on novel saturable absorbers

Le Zheng, Chen Wei, Hongrong Zhou, Fanxi Sun, Ang Gao, Dongsheng Wang, Yong Liu

Proceedings Volume 11997, Optical Components and Materials XIX; 119970F (2022) https://doi.org/10.1117/12.2608045
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We report on the feasibility of MIL-101(Cr) (MIL: Materials of Institute Lavoisier) and MIL-101(Cr)-NH₂ as novel saturable absorbers for the development of passively Q-switched nanosecond mid-infrared fiber laser systems. The MIL101(Cr) and MIL-101(Cr)-NH₂ are prepared using hydrothermal synthesis method and their modulation depths are measured to be 24.09% and 22.83%, respectively. We employ them separately as SAs to achieve passively Q-switched fiber lasers operating at 2.8 μm, for the first time, to the best of our knowledge. Stable Q-switched pulse operation is realized with the shortest pulse duration of 0.75 μs at a repetition rate of 162.58 kHz when using MIL-101(Cr) as a SA. It generates the maximum average output power of 524.4 mW, pulse energy of 2.72 μJ and peak power of 3.43 W at the launched pump power of 3.64 W. In addition, we replace the MIL-101(Cr) with MIL-101(Cr)-NH₂ and nanosecond pulses with a pulse duration of 0.79 μs and average output power of 479.5 mW are obtained. The corresponding pulse energy and peak power are 2.27 μJ and 2.87 W, respectively. Our results show that the MIL-101(Cr) and MIL-101(Cr)- NH2 are promising stable SAs for nanosecond laser pulses generation at 3 μm.

Conference Presentation

Citation Download Citation

Le Zheng, Chen Wei, Hongrong Zhou, Fanxi Sun, Ang Gao, Dongsheng Wang, and Yong Liu "Compact mid-infrared nanosecond pulsed fiber lasers based on novel saturable absorbers", Proc. SPIE 11997, Optical Components and Materials XIX, 119970F (4 March 2022); https://doi.org/10.1117/12.2608045

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