被动锁模光纤激光器中高阶色散对输出脉冲特性影响  

Influence of high-order dispersion on output pulse characteristics in passively mode-locked fiber laser

作　　者：陈炳焜 高博[1] CHEN Bingkun;GAO Bo(College of Communication Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学通信工程学院,吉林长春130012

出　　处：《应用光学》2023年第5期1102-1108,共7页Journal of Applied Optics

基　　金：吉林省教育厅科技项目(JJKH20231170KJ)。

摘　　要：构建了被动锁模光纤激光器的理论模型,通过数值仿真从时域和频域两个方面研究了高阶色散对输出脉冲特性的影响,在时域方面,三阶色散导致脉冲形状发生畸变,脉冲时域轮廓不对称,时域偏移等现象;在频域方面,三阶色散导致边带位置及强度发生变化。同时,研究发现四阶色散可以展宽脉冲,改变脉冲的边带强度。本文的研究结果对被动锁模掺镱光纤激光器的实际应用具有指导意义。A theoretical model of passively mode-locked fiber laser was constructed,and the influences of high-order dispersion on output pulse characteristics were studied by numerical simulation in both time domain and frequency domain.In terms of time domain,the third-order dispersion resulted in distortion of pulse shape,asymmetry of pulse time-domain profile and temporal shift.In terms of frequency domain,the third-order dispersion caused changes in position and intensity of sidebands.At the same time,it was found that the fourth-order dispersion could broaden the pulse and change sidebands intensity of the pulse.The results are instructive for the practical applications of the passively mode-locked ytterbium-doped fiber lasers.

关 键 词：激光器 被动锁模激光器 三阶色散 四阶色散 

分 类 号：TN248[电子电信—物理电子学]