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1.5微米的合腔被动Q开关的自我拉曼激光

Hai Wang, Di Xin, Zhenjiao Shan

|November 14, 2025

概括

一种新的合腔结构使得一个紧的,眼睛安全的,被动Q开关的自拉曼激光器在1.5μm的第一个演示成为可能. 这种设计可以实现亚纳秒脉冲和高效率的应用程序,如LiDAR.

科学领域:

* 光子学和激光技术
* 非线性光学不线性光学

背景情况:

*被动Q开关激光器对于需要高峰功率的应用至关重要.
* 自动拉曼激光器提供波长灵活性,但在效率和组件损坏方面面临挑战.
*现有的设计往往需要复杂的多波长涂层,易受损坏.

研究的目的:

* 为了展示一个紧的,眼睛安全的,被动Q开关的自我拉曼激光器,在1.5微米处工作.
* 实现低于纳秒的脉冲生成,高效率和光束质量.
* 探索可以控制脉冲数量的爆发模式操作.

主要方法:

* 在自动拉曼激光器中采用合腔结构.
*采用V:YAG可和吸收器,优化为1.5μm运行.
*调整了宽,以控制爆发模式运行并实现单脉冲发射.

主要成果:

* 实现了亚纳秒脉冲生成,脉冲宽度为0.99 ns.
* 证明单脉冲能量为28.60μJ,峰值功率为28.89 kW.
*获得了高光学转换效率 (4.14%) 和出色的光束质量 (M2 < 1.15).
*成功实现了可控脉冲计数的爆发模式操作.

结论:

* 合腔设计显著提高了合转换效率,降低了损坏风险.
*开发的激光器是紧的,眼睛安全,并提供高性能指标.
* 这种激光显示出强大的潜力,用于LiDAR,激光测距和照明的先进应用.

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