基于氟铝基玻璃的中红外光纤激光器研究进展(特邀)  

Developments in Research on Mid-Infrared Fiber Lasers Based on Fluoroaluminate Glass(Invited)

作　　者：武皞 徐昌骏 刘墨 王顺宾 王鹏飞[2] Wu Hao;Xu Changjun;Liu Mo;Wang ShunBin;Wang Pengfei(College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Qingdao Innovation and Development Center,Harbin Engineering University,Qingdao 266400,Shandong,China)

机构地区：[1]哈尔滨工程大学物理与光电工程学院,黑龙江哈尔滨150001 [2]青岛哈尔滨工程大学创新发展中心,山东青岛266400

出　　处：《中国激光》2024年第19期160-173,共14页Chinese Journal of Lasers

基　　金：国家自然科学基金(62225502)。

摘　　要：中红外波段(2.5~5.0μm)的激光由于位于大气传输窗口、分子特性吸收区和热辐射能量聚集区域,因此在大气遥感、医学诊疗、精密探测以及材料加工等领域中展现出了巨大的应用潜力。光纤激光器因其优异的光束质量、紧凑的结构、出色的散热能力以及高效的光-光转换等优势而备受关注。随着光纤激光技术的发展,其输出波长范围逐渐扩展至中红外波段。氟化物玻璃具有低声子能量、宽中红外透过范围和高稀土离子溶解度等特性,可作为中红外光纤激光器的增益介质。在众多种类的氟化物玻璃中,氟铝基玻璃因其出色的抗潮解性能和机械强度,成为潜在的可应用于高功率激光系统的增益材料。回顾了自20世纪50年代以来,氟铝基玻璃在组分、结构、中红外发光特性以及光纤制备工艺等方面的发展历程,并重点介绍了中红外氟铝基光纤激光器的最新研究成果。目前,中红外氟铝基光纤激光器已实现数瓦级中红外激光输出。展望未来,通过开发新型氟铝基玻璃体系,探索双包层氟铝基玻璃光纤制备工艺,研究光纤光栅刻写和异质光纤熔接技术,有望实现全光纤化结构的中红外氟铝基光纤激光器,并实现更高功率、更高效率和更长波长的中红外激光输出。Significance The mid-infrared(MIR)spectral band,spanning the 2.5‒5.0μm wavelength range,is included within the atmospheric transmission window and features medium molecular absorption and concentrated thermal radiation energy.These unique characteristics render MIR lasers crucial for applications in atmospheric remote sensing,medical diagnostics and therapy,gas sensing,precision detection,and material processing.Among the various laser technologies,fiber lasers are particularly favored because of their excellent beam quality,compact structure,effective heat dissipation,and high optical-to-optical conversion efficiency.With advancements in fiber laser technology,the output wavelength range has gradually expanded into the MIR band.Fluoride glasses,which are known for their low phonon energy,broad MIR transmittance,and high solubility for rare-earth ions,have been identified as ideal gain media for MIR lasers.Among the various types of fluoride glass,fluoroaluminate glass stands out because of its moisture resistance and mechanical strength,which significantly promote its application in high-power laser systems.This study traces the evolution of the composition,structure,MIR emission characteristics,and fiber fabrication techniques of fluoroaluminate glasses since the 1950s,focusing on the latest representative research findings on MIR fluoroaluminate fiber lasers.Hence,this study provides a strong basis for the future research on MIR fluoroaluminate fiber lasers and the applications of the technology.Progress The development of fluoroaluminate glass,with its unique properties(including its low refractive index,high glass transition temperature,and enhanced mechanical strength),has attracted significant interest since it was patented by Sun in 1949.The glass-forming regions of the AlF_(3)-RF_(2),AlF_(3)-RF_(2)-YF_(3)(AYF),and AlF_(3)-YF_(3)-PbF_(2)(AYP)systems have been extensively studied,leading to improved stability and reduced crystallization tendencies,as shown in Figs.1‒4.The structure of fluoroaluminate

关 键 词：中红外激光 稀土掺杂光纤激光器 氟铝基玻璃 氟铝基玻璃光纤 

分 类 号：TN248[电子电信—物理电子学]