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低漂移率的外部空腔二极管激光器

Eddie H Chang1, Jared Rivera1, Brian Bostwick1

  • 1Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.

The Review of scientific instruments
|December 11, 2023
PubMed
概括

我们开发了一种低成本的外部腔二极管激光器,频率漂移为1.4MHz/h. 这种稳定的激光性能是通过在温度控制的外内使用紧的结构来实现的.

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科学领域:

  • 原子,分子和光学物理学
  • 激光物理与技术 激光物理与技术

背景情况:

  • 二极管激光器对于各种应用至关重要,但往往会受到频率不稳定的影响.
  • 外腔二极管激光器 (ECDL) 与标准二极管激光器相比,提供了更好的频率稳定性.
  • 尽量减少频率漂移对于高精度光谱和干扰测量测量至关重要.

研究的目的:

  • 设计,建造和模拟一个简单的,低成本的外部腔二极管激光器.
  • 为了在852 nm. 实现低自由运行的频率漂移率.
  • 调查限制激光频率稳定的因素.

主要方法:

  • 构建一个紧的外腔二极管激光器.
  • 在一个气密的,温度控制的封闭室内实施.
  • 热有限元法 (FEM) 模拟用于分析温度梯度.
  • 测量自由运行的频率漂移率.

主要成果:

  • 在852 nm时实现了1.4{\displaystyle 1.4}{\displaystyle 1}} MHz/h的测量自由运行频率漂移率.
  • 证明一个紧的结构和一个稳定的温度环境可以最大限度地降低热梯度.
  • FEM模拟量化了温度梯度对激光漂移的影响.

结论:

  • 开发的外腔二极管激光器为稳定的激光光提供了低成本的解决方案.
  • 频率漂移的主要限制似乎是激光二极管和压缩老化.
  • 该设计有效地减少了热效应,为进一步的稳定性改进铺平了道路.