光纤激光器中高斯脉冲输出特性影响因素的探究  

Study on the Factors Influencing the Output Characteristics of Gaussian Pulse in Fiber Laser

作　　者：田小青 李晓辉[1] TIAN Xiaoqing;LI Xiaohui(School of Physics and Information Technology,Shaanxi Normal University,Xi’an 710062,China)

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《聊城大学学报（自然科学版）》2021年第1期36-42,共7页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(61605106);陕西师范大学启动基金项目(1112010209,1110010717);中央高校基础研究基金项目(GK201802006);陕西省国际合作项目计划项目(2020KW-005);中国科学院瞬态光学与光子学国家重点实验室开放性研究基金项目(SKLST201809);陕西师范大学优秀青年学术骨干资助计划项目(18QNGG006)资助。

摘　　要：基于耦合非线性薛定谔方程,论文数值研究了高斯脉冲在被动锁模光纤激光器中的演化,入射脉冲有快、慢两个偏振分量,两偏振方向的分量在传输过程中可以进行耦合。给出高斯脉冲演化特性与小信号增益系数和相位延迟的关系。通过比较分析得到,可以通过适当改变小信号增益或相位延迟来控制稳定传输过程中的脉冲宽度、单脉冲能量、脉冲光谱和脉冲功率。通过数值模拟,最终稳定输出中心波长为1550 nm的高斯脉冲。数值模拟结果为脉冲光纤激光器中获得更窄的脉冲宽度和更高的峰值功率脉冲提供了理论参考。Gaussian pulse evolution is numerically investigated in a passively mode-locked fiber laser based on the coupled nonlinear Schrodinger equation.The incident pulse has two polarization components,fast and slow,which are coupled during transmission.The characteristics of Gaussian pulse evolution versus the small signal gain coefficient and the phase delay are given.Through comparison and analysis,pulse’s width,single pulse energy,pulse spectrum and pulse’s power during stable transmission can be controlled by changing either small signal gain or phase delay appropriately.Finally,a stable output of 1550 nm Gaussian pulse is achieved.The numerical simulation results can provide theoretical reference for obtaining the pulse with narrower width and higher peak power in a fiber laser.

关 键 词：光纤激光器 小信号增益系数 相位延迟 

分 类 号：O437[机械工程—光学工程]