MIL-68(Al) for stable watt-level nanosecond mid-infrared Q-switched laser pulses generation

Le Zheng; Chen Wei; Shurong Jiang; Hongrong Zhou; Fanxi Sun; Dongsheng Wang; Yong Liu

doi:10.1117/12.2602716

9 October 2021 MIL-68(Al) for stable watt-level nanosecond mid-infrared Q-switched laser pulses generation

Le Zheng, Chen Wei, Shurong Jiang, Hongrong Zhou, Fanxi Sun, Dongsheng Wang, Yong Liu

Proceedings Volume 11890, Advanced Lasers, High-Power Lasers, and Applications XII; 118900X (2021) https://doi.org/10.1117/12.2602716
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

We report Q-switched Er³⁺ -doped ZBLAN fiber lasers operating at 2.8 μm based on MIL-68(Al) (MIL: Materials of Institute Lavoisier), for the first time. The nonlinear absorption of MIL-68(Al) was characterized by using a homemade nonlinear absorption measurement system. The modulation depth, non-saturable loss, and saturation peak intensity are determined to be 24.43 %, 58.63%, and 0.0335 GW/cm², respectively. A piece of 6 mol.% multimode Er³⁺ -doped ZBLAN fiber was used as the gain medium. The maximum average output power as high as 1.18 W was reached with the shortest pulse duration as short as 546 ns at a repetition rate of 106.71 kHz. The corresponding pulse energy and peak power were 11.03 μJ and 20.19 W, respectively. Then, we replaced the gain fiber with a 7 mol.% single-mode Er³⁺ -doped ZBLAN fiber and achieved nanosecond pulses with a pulse duration of 846 ns and average output power of 0.734 W. The corresponding pulse energy and peak power were 3.68 μJ and 4.25 W, respectively. Our work shows that the MIL-68(Al) is a promising stable SA for mid-infrared high-power nanosecond laser pulses generation.

Citation Download Citation

Le Zheng, Chen Wei, Shurong Jiang, Hongrong Zhou, Fanxi Sun, Dongsheng Wang, and Yong Liu "MIL-68(Al) for stable watt-level nanosecond mid-infrared Q-switched laser pulses generation", Proc. SPIE 11890, Advanced Lasers, High-Power Lasers, and Applications XII, 118900X (9 October 2021); https://doi.org/10.1117/12.2602716

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KEYWORDS

Erbium

ZBLAN

Q switched lasers

Fiber lasers

Mid-IR

Q switching

Laser countermeasures

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