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长波长分布式反渐变的量子级联激光器.

Davide Pinto, Daniel Andres Díaz Thomas, Zeineb Loghmari

|November 14, 2024

概括

此摘要是机器生成的。

我们开发了分布式反渐的量子级联激光器,发射在14微米. 这些激光器显示出更好的输出功率,减少光束分歧,以及在室温附近稳定的单模式运行.

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Last Updated: Jun 7, 2025

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Published on: November 22, 2019

科学领域:

量子光学就是一个量子光学.
半导体设备物理学半导体设备物理

背景情况:

量子级联激光器 (QCL) 对中红外应用至关重要.
分布式反 (DFB) 机制使单模发射成为可能.
形设计可以提高功率和光束质量.

研究的目的:

为了研究DFB形量子级联激光器 (QCLs) 在14μm的性能.
优化缩角,以改善输出功率和光束特性.
为了实现稳定,单模式,连续波 (CW) 操作.

主要方法:

制造具有不同角 (0°3°) 的DFB QCL.
输出功率,光束分歧和光束质量的表征 (M2).
使用布拉格格和侧模式抑制比率 (SMSR) 评估单一纵向模式操作.

主要成果:

输出功率与不同缩角度的活跃区域体积进行缩放.
实现了低至4.2°的减小光束分歧角度.
已经证明了衍射有限的光束质量 (M2 ≈ 1).
实现了几乎达到室温的连续波运行.
高侧模式抑制比率 (>20 dB) 证实单模式运行.

结论:

圆形 DFB QCL 提供了一条可行的通道到高功率,高光束质量的中红外线源.
优化的逐渐缩小显著提高了激光性能指标.
这些激光器对于需要在14微米范围内的稳定单模发射的应用具有前景.