摘要
半导体泵浦碱金属蒸汽激光器(DPAL)兼具半导体激光器和气体激光器的技术特点,具有量子效率高、受激发射截面大、折射率扰动较小和热管理便捷等优势,可实现高效率、高功率和高光束质量近红外激光输出,在工业制造、军事、医疗和科研等领域具有重要的应用价值。对于封闭静止型DPAL,在高功率泵浦情况下,蒸汽池内工作气体温度升高,热效应严重,造成DPAL性能下降。而循环流动型DPAL利用气体流动带走废热,可显著缓解工作气体的热效应,从而实现高功率激光输出。目前,循环流动型DPAL已成为实现高功率激光输出的主要技术路线,引发了越来越多的关注和研究。文中将介绍循环流动型DPAL的基本原理,概述其国内外发展现状,分析其高功率运转情况下的主要问题和解决途径,并对循环流动型DPAL的发展趋势进行展望。
Diode pumped alkali metal vapor laser(DPAL)combines the technical characteristics of both diode laser and gas laser,with the advantages of high quantum efficiency,large excited emission cross section,small refractive index perturbation,convenient thermal management and rich output wavelength,which can achieve high efficiency,high power and high beam quality near infrared laser output,and has important applications in industrial manufacturing,military,medical and scientific research fields.For closed static DPAL,under the condition of high power pump,the working gas temperature in the steam pool increases,and the thermal effect is serious,resulting in the decline of DPAL performance.The circulating flow DPAL uses gas flow to take away waste heat,which can significantly alleviate the thermal effect of working gas,so as to achieve high-power laser output.At present,it has become the mainstream technical route to achieve high power laser output.In this paper,the principles and current development of the flowing-gas circulation DPAL are outlined,the obstacles and solutions of high power scaling of DPAL are analysed,and prospects for the future development of high-power alkali metal lasers.
作者
季艳慧
何洋
万浩华
孙俊杰
陈飞
Ji Yanhui;He Yang;Wan Haohua;Sun Junjie;Chen Fei(State Key Laboratory of Laser Interaction with Matter,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2020年第12期144-154,共11页
Infrared and Laser Engineering
基金
国家重点研发计划战略性国际科技创新合作重点专项(2018YFE0203203)
激光与物质相互作用国家重点实验室开放基础研究课题(SKLLIM1815)
国家自然科学基金(61975203,62005274)
中国科学院青年创新促进会(2017259)。
