LD泵浦高平均功率、高光束质量掺镱光纤激光振荡器与放大器研究进展  

Review of High Average Power and High Beam Quality LD-Pumped Ytterbium-Doped Fiber Laser Oscillators and Amplifiers

作　　者：杨保来 王鹏[1,2,3] 奚小明 马鹏飞 王小林 王泽锋[1,2,3] Yang Baolai;Wang Peng;Xi Xiaoming;Ma Pengfei;Wang Xiaolin;Wang Zefeng(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,Hunan,China;Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,Hunan,China;Hunan Provincial Key Laboratory of High Energy Laser Technology,Changsha 410073,Hunan,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]国防科技大学南湖之光实验室,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：《光学学报》2023年第17期140-160,共21页Acta Optica Sinica

基　　金：国家自然科学基金(62005315);脉冲功率激光技术国家重点实验室开放基金(SKL2022ZR02)。

摘　　要：综述了近年来公开报道的LD泵浦光纤激光器的研究进展及典型结果,分为光纤激光振荡器、光纤激光放大器和“振荡+放大一体化”激光器3个部分进行介绍。在光纤激光振荡器部分,介绍了空间结构光纤振荡器和全光纤结构光纤振荡器的发展及典型结果;在光纤放大器部分,重点对大于5 kW功率的典型光纤放大器进行介绍;最后,对改进的“振荡+放大一体化”激光器的典型结果及技术优势进行介绍。Significance High power fiber lasers with high beam quality have been widely adopted as laser sources in many applications,such as laser cutting,laser welding,manufacturing,and military defense.The advantages of high conversion efficiency,good beam quality,compact structure,and reliable stability,are favored by the consumers.There has been a remarkable increase in the output power of fiber lasers,and the business consumption of high power fiber lasers in the market shows a remarkable increase in recent years.High power and high beam quality are essential aspects of many manufacturing and defense applications.There are two strategies to achieve high power laser beams,which are multi-laser beam combinations and power scaling of single fiber laser.The single fiber laser with high power can be directly employed as a laser source in the manufacture or serve as an element in multi-laser beam combinations.However,the power scaling of high brightness monolithic fiber laser oscillators is limited by the manufacturing techniques of fiber laser components,stimulated Raman scattering(SRS)effect,and transverse mode instability(TMI)effect.In order to achieve a monolithic fiber laser with high power and high beam quality,the SRS and TMI effects in the fiber lasers have to be effectively mitigated based on the current power handling ability of the laser components.In this paper,three strategies to achieve high power fiber lasers are respectively reviewed and discussed,which correspond to the fiber laser oscillators,the fiber laser amplifiers,and the oscillating-amplifying integrated fiber lasers.Progress First,the progress of kW-level fiber laser oscillators is reviewed.The published reports on high power fiber laser oscillators are reviewed in respective spatial configurations and all-fiber configurations.In the spatial configurations,reflection mirrors serve as cavities mirrors,and the coupling of pump and signal lasers are achieved by the lens.In the allfiber configuration,the fiber Bragg gratings serve as cavity mirrors,and

关 键 词：掺镱光纤 高功率 光纤激光振荡器 光纤激光放大器 

分 类 号：O436[机械工程—光学工程]