Widely Tunable BaGa2GeSe6 Optical Parametric Amplifier Pumped by a Mode-Locked Nd: YAG Laser

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Photonics Technology Letters Pub Date : 2024-09-11 DOI:10.1109/LPT.2024.3457910

Jingjing Zhang;Feng Yang;Wenlong Li;Hongwei Gao;Yong Bo;Qinjun Peng

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Abstract

Powerful and compact coherent mid-infrared radiation source is crucial for a vast number of applications. A widely tunable 3-

$15~\mu $

m optical parametric amplifier with BaGa2GeSe6 crystal pumped by a picosecond mode-locked 1064 nm laser was demonstrated for the first time. Type-I produced a maximum energy of

$377~\mu $

J at

$5.2~\mu $

m, while type-II achieved a maximum energy of

$294~\mu $

J at

$6.7~\mu $

m under the incident pump energy of 11.8 mJ, corresponding to the pump-to-idler energy efficiency of 3.2% and 2.5%, respectively. Furthermore, the corresponding phase-matching angles for 3–

$15~\mu $

m were measured experimentally. Moreover, the conversion efficiency, typical pulse temporal shapes and beam spatial profiles of idler were calculated based on a BaGa2GeSe6-OPA numerical model. The results indicate the potential of BaGa2GeSe6 pumped at 1064 nm for realizing high-efficiency and high-energy mid-infrared laser radiation.

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由模式锁定 Nd: YAG 激光器泵浦的宽调谐 BaGa2GeSe6 光参量放大器

功能强大、结构紧凑的相干中红外辐射源对大量应用至关重要。利用皮秒锁模 1064 nm 激光泵浦的 BaGa2GeSe6 晶体，首次展示了一种 3- $15~\mu $ m 的广泛可调谐光参量放大器。在入射泵浦能量为11.8 mJ的情况下，I型放大器在5.2~\mu m产生的最大能量为377~\mu $ J，而II型放大器在6.7~\mu $ m产生的最大能量为294~\mu $ J，对应的泵浦-idler能量效率分别为3.2%和2.5%。此外，实验还测量了 3- $15~\mu $ m 的相应相位匹配角。此外，还根据 BaGa2GeSe6-OPA 数值模型计算了惰流器的转换效率、典型脉冲时间形状和光束空间轮廓。结果表明，在 1064 nm 波段泵浦的 BaGa2GeSe6 具有实现高效率、高能量中红外激光辐射的潜力。

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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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.