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在LiNbO₃中进行2μm的送光学整形,用于>2%的激光到0.4 THz转换

Yufang Ding, Zhixuan Hu, Yuting Wang

|December 15, 2025

概括

使用更长波长的2微米激光器显著提高了尼酸盐 (LN) 光学整正 (OR) 系统中太赫兹 (THz) 脉冲生成效率. 这一3.9倍的增长克服了THz来源的以前的转换效率限制.

科学领域:

非线性光学是一种非线性光学.
太赫兹 (THz) 是科学和技术的频率.

背景情况:

在酸 (LN) 中的光学整正 (OR) 是产生宽带太赫兹 (THz) 脉冲的关键方法.
低激光到THz转换效率是当前OR系统的一个主要限制.

研究的目的:

调查激光波长对LN的THz发电效率的影响.
为了确定一个最佳的波长,以提高OR效率.

主要方法:

纳入材料吸收的数值模拟,以确定最佳波长.
实验验证使用冷冷却的LN晶体,用2μm和800nm激光送.
电光采样用于THz脉冲表征.

主要成果:

模拟确定了大约2μm作为最佳波长.
使用2μm实现了2.12%的转换效率,比800nm提高了3.9倍.
生成的THz脉冲是单周期的,中心频率为0.4 THz.

结论:

将激光波长提高到2μm,可以显著提高OR在LN的效率.
2μm抽为开发高效的THz源提供了一个有前途的战略.
这一进步可以使各种需要强大高效源的THz应用受益.

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