分布反馈式光纤激光器线宽特性及其展宽机理研究

摘要

The linewidth characteristics of distributed feedback fiber laser （DFB-FL） is fully explored in this paper. The linewidth broadening effect of DFB-FL induced by self-pulsation, phase-shifted grating, especially lasing window, external disturbance, etc. are extensivly investigated in the paper based on the theoretical derivation and experiment. An effective linewidth compression method is proposed, and a self-injection system of DFB-FL comes up to reduce its linewidth from 35 kHz to less than 10 kHz.%针对分布反馈式光纤激光器（DFB-FL）线宽特性进行了深入研究．通过理论推导和实验验证，分析了自脉动、相移光栅、激射窗口宽度以及外界环境扰动等因素对DFB-FL线宽的展宽作用．进一步提出了压缩DFB-FL线宽的有效方法和途径，给出了自注入锁模方式下对DFB-FL线宽压缩的对比实验结果，将DFB-FL的线宽从35kHz压缩到了10kHz．