相位调制展宽激光的线宽压缩方法研究  

Research on the line-width compression of phase-modulated broadening laser

作　　者：刘迎国 岳耀笠[2] 朱尤智 LIU Ying-guo;YUE Yao-li;ZHU You-zhi(Unit 95835 of PLA,Urumqi 830000,China;The 34th Institute of CETC,Guilin 541000,China)

机构地区：[1]中国人民解放军第95835部队,新疆乌鲁木齐830000 [2]中国电子科技集团公司第三十四研究所,广西桂林541000

出　　处：《激光与红外》2020年第1期54-57,共4页Laser & Infrared

摘　　要：单频激光通过相位调制可以进行光谱展宽、提高光纤放大器受激布里渊散射的阈值,从而可以提高光纤放大器的输出功率,但也破坏了单频激光的高相干性;本文根据相位调制光谱展宽的原理公式,提出了进行激光线宽压缩的思路,用于激光放大后恢复相干性能;根据线宽压缩的原理提出了线宽压缩装置的构造,即采用两个相位调制器,一个负责光谱展宽,另一个负责光纤放大后的线宽压缩,并提出了实现线宽压缩的相位差调节和幅度调节的控制条件;限于实验条件不足,本文仅对理论模型进行了分析。By using phase modulation,single-frequency laser can broaden the spectrum and increase the threshold of stimulated Brillouin scattering of the fiber amplifier,so the output power of fiber amplifier can be improved,but the high coherence of single-frequency laser is also destroyed.According to the principle formula of spectral broadening by phase modulation,the idea of laser line-width compression is proposed in this paper,which can be used to recover the coherence after laser amplification.According to the principle of line-width compression,the construction of line-width compression device is put forward,that is,two phase modulators are used,one is responsible for spectral broadening,the other is responsible for line-width compression after fiber amplification,and the control conditions for realizing phase difference adjustment and amplitude adjustment of line-width compression are put forward.Due to the lack of experimental conditions,this paper only analyzes the theoretical model.

关 键 词：窄线宽脉冲光纤激光器 激光相位调制光谱展宽 谱线操作 线宽压缩 受激布里渊散射阈值 

分 类 号：TN212[电子电信—物理电子学]