高功率3~5微米波段超连续谱光纤激光研究进展  

Progress on High-Power Supercontinuum Laser Sources at 3-5 μm

作　　者：杨林永 张斌[1,2,3] 侯静 Yang Linyong;Zhang Bin;Hou Jing(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha,Hunan 410073,China;State Key Laboratory of Pulsed Power Laser Technology,Changsha,Hunan 410073,China;Hunan Provincial Key Laboratory of High Energy Laser Technology,Changsha,Hunan 410073,China)

机构地区：[1]国防科技大学前沿交叉学科学院,湖南长沙410073 [2]脉冲功率激光技术国家重点实验室,湖南长沙410073 [3]高能激光技术湖南省重点实验室,湖南长沙410073

出　　处：《中国激光》2022年第1期3-24,共22页Chinese Journal of Lasers

摘　　要：高功率3~5μm波段中红外超连续谱激光器在环境监测、生物医疗、测绘计量、国防安全等领域有重要应用。在用于产生中红外超连续谱激光的非线性介质中,光纤易于实现大的非线性系数,且有效作用距离长、结构灵活、便于集成,得到了广泛研究。近年来,3~5μm波段高功率中红外超连续谱光纤激光的技术方案日益丰富,性能指标逐步提升。总结了光谱覆盖3~5μm的中红外超连续谱光纤激光的发展现状,并对其发展趋势进行了展望。High-power mid-infrared supercontinuum(MIR-SC)lasers ranging 3-5μm find important applications in the fields of environmental monitoring,bio-medicine,metrology,national security,and etc.Fibers have been serving as popular nonlinear media for SC generation due to the merits of large nonlinear coefficients,long effective nonlinear interaction lengths,feasible structures,and being suitable for all-fiber integration.In recent years,new schemes for fiber-based MIR-SC lasers have been developed and the performance of such MIR-SC lasers has been significantly promoted along with the progress in the techniques of fiber-based pump lasers and fabrication/posttreatment of mid-infrared fibers.In this paper,the current status of fiber-based MIR-SC lasers covering the 3-5μm region is reviewed and the future development is prospected.Significance Compared with traditional broadband light sources such as halogen light sources,the SC lasers have good spatial coherence and high brightness.In addition,different from the traditional lasers with high monochromaticity,the SC lasers have both a wide spectral range and high spatial coherence.It has become the unremitting pursuit of researchers to obtain SC lasers with high powers and wide spectra.In the past decade,the MIR-SC laser sources have been developed rapidly.Parameters including output power and spectral range are constantly improved.However,there are still some unfavorable factors that limit the development of MIR-SC lasers.It is meaningful for the further development of MIR-SC lasers to make a systematic summary of the development status and analyze the developing trend of MIR-SC lasers.Progress In this paper,the characteristics of MIR-SC lasers are first introduced,and then the mid-infrared fibers are introduced.Next,the development statuses of mid-infrared SC lasers based on passive ZBLAN fibers,active ZBLAN fibers,passive InF_(3) fibers,and other nonlinear fibers are introduced in turn.Herein,the state-of-the-art research results of MIR-SC lasers are reviewed.Finally,the

关 键 词：激光光学 超连续谱产生 非线性效应 光纤 光纤放大器 

分 类 号：O436[机械工程—光学工程]