3.5-μm gain-switch fiber laser

Shurong Jiang; Chen Wei; Le Zheng; Hongrong Zhou; Han Zhang; Jing Zhang; Yong Liu

doi:10.1117/12.2605725

24 November 2021 3.5-μm gain-switch fiber laser

Shurong Jiang, Chen Wei, Le Zheng, Hongrong Zhou, Han Zhang, Jing Zhang, Yong Liu

Author Affiliations +

Proceedings Volume 12060, AOPC 2021: Advanced Laser Technology and Applications; 120600N (2021) https://doi.org/10.1117/12.2605725
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

In this work, we propose, to the best of our knowledge, the first demonstration of a ~3.5 μm dual-wavelength pumping (DWP) Er³⁺-doped ZBLAN fiber laser gain switched by 976 nm pulses. The DWP scheme is composed of a pulsed 976 nm laser system and a home-made continuous-wave 1973 nm laser. Stable pulses were obtained with repetition rates ranging between 5.2 kHz and 10 kHz. The maximum output power energy of 50.4 μJ was achieved at 10 kHz with a wavelength of 3445.9 nm. The temporal profile of the pulse trains was characterized by stable relaxation spike pulses containing a series of sub-pulses. The pulse characteristics with respect to the pump energy and the underlying mechanism are discussed. This work makes an effort to better understand the dynamics and theory of the cascade pumping system, and provides a new perspective for the realization of high-power pulses beyond 3 μm.

Citation Download Citation

Shurong Jiang, Chen Wei, Le Zheng, Hongrong Zhou, Han Zhang, Jing Zhang, and Yong Liu "3.5-μm gain-switch fiber laser", Proc. SPIE 12060, AOPC 2021: Advanced Laser Technology and Applications, 120600N (24 November 2021); https://doi.org/10.1117/12.2605725

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