基于半导体光放大器的明暗激光脉冲研究  

Study on bright and dark laser pulses based on semiconductor optical amplifier

作　　者：冒燕[1,3] 童杏林[1] 史一凡 徐小强[2] MAO Yan;TONG Xinglin;SHI Yifan;XU Xiaoqiang(National Engineering Research Center of Fiber Optic Sensing Technology and Networks,Wuhan University of Technology,Wuhan 430070,China;School of Automation,Wuhan University of Technology,Wuhan 430070,China;Weihai Research Institute,Wuhan University of Technology,Weihai Shandong 264300,China)

机构地区：[1]武汉理工大学光纤传感技术与网络国家工程研究中心,武汉430070 [2]武汉理工大学自动化学院,武汉430070 [3]武汉理工大学威海研究院,山东威海264300

出　　处：《光通信技术》2024年第5期102-107,共6页Optical Communication Technology

基　　金：国家自然科学基金项目(批准号:61275052、U2340226)资助;湖北省自然科学基金项目(批准号:2022CFB385)资助;山东省自然科学基金项目(批准号:ZR2020MF111)资助。

摘　　要：为了解决激光明脉冲在光通信和光纤传感等领域的应用瓶颈,设计了一种基于半导体光放大器(SOA)的锁模光纤环形激光器,该激光器由SOA、偏振控制器、滤波器和起偏器等构成。分析了横电/横磁(TE/TM)模式光场经历SOA时的增益比值和相位差的变化机理,研究了环腔内总色散管理与SOA动态增益的关系,获得了稳定输出的明脉冲和暗脉冲,以及2种类型脉冲的动态演变过程。实验结果表明:当SOA的工作电流为242 mA时,成功获得脉冲重复频率均为14.83 MHz、脉宽为1.1ns的明脉冲和脉宽为0.95ns的暗脉冲,并验证了在相同工作电流时,暗脉冲的强度显著大于明脉冲的强度。To address the application bottlenecks of bright laser pulses in optical communications and fiber optic sensing,a mode-locked fiber ring laser based on semiconductor optical amplifiers(SOA)is designed.This laser consists of an SOA,a polarization controller,a filter,and a polarizer.The mechanism of the gain ratio and phase difference changes in transverse electric/transverse magnetic(TE/TM)mode optical fields when passing through SOA is analyzed.The relationship between total dispersion management within the ring cavity and dynamic gain of SOA is investigated,resulting in stable output of bright pulses and dark pulses,as well as the dynamic evolution process of both types of pulses.The experimental results show that when the operating current of SOA is 242 mA,bright pulses with a pulse width of 1.1 ns and dark pulses with a pulse width of 0.95 ns are successfully obtained at repetition rates of 14.83 MHz,respectively.It is also verified that under the same operating current conditions,the intensity of the dark pulses significantly exceeds that of the bright pulses.

关 键 词：半导体光放大器 明脉冲 暗脉冲 被动锁模 非线性极化旋转 

分 类 号：TN256[电子电信—物理电子学]