NbSe₂/PtTe₂ heterostructures as saturable absorbers for mid-infrared pulsed solid-state lasers.

Applied optics Pub Date : 2024-12-01 DOI:10.1364/AO.538546

Yiheng Yang, Lulu Gao, Yingxue Han, Qiong Gao, Ruijun Lan, Yingjie Shen

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Abstract

We have realized for the first time, to the best of our knowledge, a 2 µm nanosecond solid-state passive Q-switched Tm:YAP laser based on a N b S e ₂/P t T e ₂ heterojunction saturable absorber. At an incident pump power of 12.69 W, the Tm:YAP laser produces stable laser pulses with a minimum pulse width of 818 ns, a maximum single-pulse energy of 15.48 µJ, and a peak power of 18.93 W at a repetition rate of 79.44 kHz. The comparison results show enhanced saturable absorption performance compared to single N b S e ₂ (1 µs, 70.32 kHz) and single P t T e ₂ (1.31 µs, 71.97 kHz). The experimental results confirm that the N b S e ₂/P t T e ₂ heterojunction is a promising saturable absorption material that can be used to realize high-performance mid-infrared pulsed lasers. The resulting nanosecond 2 µm Q-switched pulsed laser will play an important role in atmospheric monitoring, lidar, and other fields, and can provide a strong driving force.

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作为中红外脉冲固态激光器可饱和吸收体的 NbSe2/PtTe2 异质结构。

据我们所知，我们首次实现了基于 N b S e 2/P t T e 2 异质结可饱和吸收器的 2 µm 纳秒固态无源 Q 开关 Tm:YAP 激光器。入射泵浦功率为 12.69 W 时，Tm:YAP 激光器能产生稳定的激光脉冲，最小脉冲宽度为 818 ns，最大单脉冲能量为 15.48 µJ，峰值功率为 18.93 W，重复频率为 79.44 kHz。对比结果显示，与单个 N b S e 2（1 µs，70.32 kHz）和单个 P t T e 2（1.31 µs，71.97 kHz）相比，可饱和吸收性能有所提高。实验结果证实，N b S e 2/P t T e 2 异质结是一种很有前途的可饱和吸收材料，可用于实现高性能中红外脉冲激光器。由此产生的纳秒级 2 µm Q 开关脉冲激光器将在大气监测、激光雷达等领域发挥重要作用，并能提供强大的驱动力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Applied optics

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