基于同带纤芯泵浦的L波段高能量脉冲光纤激光器  

High-Energy L-Band Pulsed Fiber Laser Based on In-Band Core Pumping

作　　者：黄为一洪 赵一鸣 白航宇 朱方顺 潘科 王志 王晨晟[1] 李飞 HUANG Wei-yihong;ZHAO Yi-ming;BAI Hang-yu;ZHU Fang-shun;PAN Ke;WANG Zhi;WANG Chen-sheng;LI Fei(Huazhong Institute of Electro-Optics-Wuhan National Laboratory for Optoelectronics,Wuhan 430233,China;Beijing Research Institute of Telemetry,Beijing 100076,China;Advanced Research Institute of Multidisciplinary Sciences,Beijing Institute of Technology,Beijing 100076,China)

机构地区：[1]华中光电技术研究所-武汉光电国家研究中心,湖北武汉430233 [2]北京遥测技术研究所,北京100076 [3]北京理工大学前沿交叉科学研究院,北京100076

出　　处：《光学与光电技术》2024年第6期18-26,共9页Optics & Optoelectronic Technology

基　　金：国家青年拔尖人才支持项目(09974)资助。

摘　　要：以高能量窄线宽脉冲激光器为核心的激光雷达技术被广泛应用于大气遥感领域。介绍了一种基于MOPA结构的同带纤芯泵浦脉冲光纤激光器。该激光器采用分体式设计,其中种子模块可输出带脉冲能量为1.8μJ的激光脉冲,并实现中心波长在1 572.018 nm和1 572.480 nm间以1~100 Hz的重复频率进行切换。在环境温度10~40℃的范围内,种子模块输出的中心波长漂移不大于0.58 pm,输出脉冲宽度在200~400 ns可调。放大模块采用同带纤芯泵浦对种子模块输出光脉冲进行放大,通过优化光路并抑制主放大级受激布里渊散射效应,实现了200 ns脉冲宽度下76.49μJ以及400 ns脉冲宽度下135.7μJ的高能量输出,同时具有近衍射极限光斑和优异的光谱信噪比。该激光器可用作差分吸收激光雷达的光源,在CO_(2)气体浓度遥感测量应用领域具有实用意义。Lidar technology based on high-energy narrow linewidth pulse lasers is widely used in the field of atmospheric remote sensing.An in-band core pumping pulsed fiber laser based on MOPA is introduced in this paper.The laser adopts a split design,in which the seed module can output laser pulses with a pulse energy of 1.8μJ,and switch the center wavelength between 1572.018 nm and 1572.480 nm at a repetition rate of 1~100 Hz.Within the temperature range of 10~40℃,the center wavelength drift of the seed module output is not more than 0.58 pm,and the output pulse width is adjustable between 200~400 ns.The amplification module amplifies the output pulses of the seed module by using in-band pump.By suppressing the stimulated Brillouin scattering effect of the main amplification stage,high-energy outputs of 76.49μJ at a pulse width of 200 ns and 135.7μJ at a pulse width of 400 ns are achieved,with near diffraction limit spot and excellent spectral signal-to-noise ratio.The laser can be used as a source for differential absorption lidar and has practical significance in the field of remote sensing measurement of CO_(2)gas concentration.

关 键 词：脉冲光纤激光器 主振荡功率放大 同带泵浦 纤芯泵浦 受激布里渊散射 

分 类 号：TN248[电子电信—物理电子学]