一种主动锁模光纤激光器超模噪声的抑制方法  

A technique for suppressing the super-mode noise of actively mode-locked fiber lasers

作　　者：薛天明[1] 朱广浩 

机构地区：[1]南京大学电子科学与工程学院,南京210023

出　　处：《南京大学学报（自然科学版）》2015年第1期37-42,共6页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金(2011CBA001)

摘　　要：本文介绍了一种抑制主动锁模光纤激光器超模噪声的新方法.该方法采用基于光强信号的负反馈技术对激光器腔内的光脉冲能量进行动态调整,从而抑制激光脉冲的幅度抖动.通过仿真,讨论了负反馈回路的增益、带宽、和脉冲时延对激光器噪声抑制效果的影响.仿真结果表明通过合理地设置参数,本方法可以使激光器超模噪声的抑制比达到60dB.We introduce a technique to suppress the super-mode noise of actively mode-locked fiber lasers.This is achieved by driving the intra-cavity modulator with a RF signal and a feedback signal that is derived from the laser＇s output.Using numerical simulations,we examine the effects of feedback loop gain,loop bandwidth,and loop delay on the extent of laser super-mode noise suppressions.Our results show that with proper choices of the loop parameters,the supper-mode noises of actively mode-locked fiber lasers can be suppressed by as much as 60 dB.

关 键 词：主动锁模 光纤激光器 超模噪声 

分 类 号：TN242[电子电信—物理电子学]