宽调谐窄线宽外腔半导体激光器研究进展

Advances in wide-tuning and narrow-linewidth external-cavity diode lasers

外腔型半导体激光器具有低噪声、高边模抑制比、高温度稳定性、结构简单、成本低等优势,已成为实现宽调谐和窄线宽特性的优选方案,被广泛应用于光通信、激光雷达、环境监测、光谱分析、光学相干断层扫描等前沿领域.本文详细介绍了宽调谐窄线宽外腔型半导体激光器的技术方案和发展现状.按照不同的结构分类,深入分析其结构、工作原理及性能特点,讨论近年来国际前沿研究方案的结构特点、关键技术、光学性能和应用领域.最后,对宽调谐窄线宽外腔型半导体激光器面临的挑战和潜在的发展前景作出分析和展望.

The external-cavity diode laser is advantageous in terms of low noise, high side-mode suppression ratio, high temperature stability, simple structure, and low cost, which has been the preferred scheme to realize wide-tuning and narrow-linewidth characteristics. Thus, it has been widely used in optical communication, lidar,environmental monitoring, spectral analysis, optical coherence tomography, and other frontier fields. Herein, we introduce the technical scheme and review the development status of wide-tuning and narrow-linewidth externalcavity diode lasers in detail. Primarily, the structure, working principles, and performance characteristics of external-cavity diode lasers are deeply analyzed according to different structures. The structural characteristics,key technologies, optical performance and application fields of state-of-the-art studies in recent years are discussed.Finally, the challenges and potential development prospects of wide-tuning and narrow-linewidth external-cavity diode lasers are analyzed and discussed.