高稳频窄线宽半导体激光器

 

 

摘要：在相干光通信和空间光通信领域，激光器的线宽和频率稳定性对于保证通信质量起到至关重要的影响，因此需要采取相应的措施来压窄线宽并保证频率稳定。从芯片工艺入手，介绍了当前几种典型芯片的结构、性能特点以及其所能达到的线宽和稳频水平。针对高稳频窄线宽的要求，从主动稳频和被动稳频两种途径介绍稳频技术。为进一步提高稳频效果，介绍了当前较流行的激光器驱动电路的组成，以及温控电路的结构和相应的算法处理。
关键词：高稳频；窄线宽；半导体激光器


Abstract: In the field of coherent optical communication and space optical communication, the linewidth and frequency stability of laser play an important role in ensuring the quality of communication, so it is necessary to take corresponding measures to narrow the linewidth and ensure the frequency stability. Starting from the chip technology, the structure and performance characteristics of several typical chips at present are proposed, as well as the linewidth and frequency stabilization level they can achieve. According to the requirements of high frequency stability and narrow linewidth, the frequency stabilization technology is introduced from two ways: active frequency stabilization and passive frequency stabilization. In order to further improve the effect of frequency stabilization, the composition of the current popular laser driver circuit, as well as the structure of the temperature control circuit and the corresponding algorithm processing are introduced.
Keywords: high frequency stability; narrow linewidth; semiconductor laser