光纤激光器中亮暗孤子对的传输特性  

Transmission Characteristics of Bright-Dark Soliton Pair in Fiber Lasers

作　　者：石佳 王娟芬 张聪 张朝霞 杨玲珍 Shi Jia;Wang Juanfen;Zhang Cong;Zhang Zhaoxia;Yang Lingzhen(College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, Shanxi 030600, Chin)

机构地区：[1]太原理工大学物理与光电工程学院,山西太原030600

出　　处：《光学学报》2018年第5期227-233,共7页Acta Optica Sinica

基　　金：国家自然科学基金(61675144;61575137)

摘　　要：基于简化的光纤激光器模型,采用分步傅里叶方法,数值研究亮暗孤子对在光纤激光器中的传输特性。研究结果表明,在光纤激光器中,亮暗孤子对是否稳定存在与群速度色散有关,亮暗孤子对在零色散区可以保持波形不变的稳定传输。同时亮暗孤子对受光纤激光器的小信号增益系数、饱和能量、初始脉宽、偏振角度等因素的影响。小信号增益系数越大,饱和能量越大,则亮暗孤子对的峰值强度越大,脉宽越窄。当峰值强度增加到一定程度,亮暗孤子对发生分裂。偏振控制器可以控制亮暗孤子对的输出。本研究结果可为光纤激光器中亮暗孤子对信号源的产生研究提供一定的理论依据。Based on the simplified model of fiber laser,the transmission characteristics of bright-dark soliton pair in fiber laser are studied numerically by the split-step Fourier method.The results show that the stable existence of the bright-dark soliton pair is related to the group velocity dispersion,and the bright-dark soliton pair can maintain the stable transmission in the zero dispersion region.At the same time,the bright-dark soliton pair is influenced by the small signal gain coefficient,saturated energy,initial pulse width,and polarization angle in fiber laser.The larger the small signal gain coefficient or the saturation energy,the peak intensity of the bright-dark soliton pair is greater with the width narrower.When the peak intensity increases to a certain degree,the bright-dark soliton pair is split.The polarization controller can control the output of the bright-dark soliton pair.These results can provide some theoretical basis for the research on the generation of signal sources of bright-dark soliton pair in fiber laser.

关 键 词：非线性光学 亮暗孤子对 光纤激光器 非线性薛定谔方程 

分 类 号：O437[机械工程—光学工程]