2.79-μm high peak power LiNbO3 acousto-optic Q-switched Er,Cr:YSGG laser with thermal lensing effect compensation

IF 1.9 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Frontiers in Physics Pub Date : 2023-08-15 DOI:10.3389/fphy.2023.1201822

Lingling Jiang, Zhongchao Wu, Shengjie Ma, Yongbin Zhu, Tingqing Cheng, Hai-he Jiang

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Abstract

A new type of lithium niobate (LiNbO3) acousto-optic Q-switched Er,Cr:YSGG laser with high peak power was designed and the thermal lensing effect compensation was studied. The values of thermal focal length in the gain medium were calculated theoretically and measured experimentally. The experimental results validate the designed plane-convex resonator validity, and the output performance of the 2.79 μm Er,Cr:YSGG laser was obviously improved. When the laser operated at free running region, the maximum values of pulse energy was 160 mJ at 60 Hz, compared with the plane-parallel resonator, the pulse energy was increased by 2 times in the plane-convex resonator. When the LiNbO3 Q-switched laser operated at 60 Hz, the maximum values of pulse energy was 8.5 mJ, and the minimum values of pulse duration was 60.8 ns, and the corresponding peak power approximately was 140 kW, respectively. Compared with the plane-parallel resonator, the pulse energy was increased by 1.6 times in the plane-convex resonator, the corresponding peak power was increased by 2.3 times.

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具有热透镜效应补偿的2.79 μm峰值功率LiNbO3声光调q Er,Cr:YSGG激光器

设计了一种新型峰值功率高的铌酸锂(LiNbO3)声光调q Er,Cr:YSGG激光器，并对其热透镜效应进行了补偿研究。对增益介质中的热焦距进行了理论计算和实验测量。实验结果验证了所设计的平面-凸谐振腔的有效性，2.79 μm Er,Cr:YSGG激光器的输出性能得到了明显改善。当激光器在自由运行区域工作时，60 Hz时脉冲能量最大值为160 mJ，与平面平行谐振腔相比，平面凸谐振腔的脉冲能量增加了2倍。当LiNbO3调q激光器工作在60 Hz时，脉冲能量最大值为8.5 mJ，脉冲持续时间最小值为60.8 ns，峰值功率约为140 kW。与平面-平行谐振腔相比，平面-凸谐振腔的脉冲能量提高了1.6倍，峰值功率提高了2.3倍。

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来源期刊

Frontiers in Physics Mathematics-Mathematical Physics

CiteScore

4.50

自引率

6.50%

发文量

1215

审稿时长

12 weeks

期刊介绍： Frontiers in Physics publishes rigorously peer-reviewed research across the entire field, from experimental, to computational and theoretical physics. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, engineers and the public worldwide.