强激光与粒子束2026，Vol.38Issue(1)：18-23,6.DOI:10.11884/HPLPB202638.250252
百瓦级飞秒棒状光子晶体光纤激光器
Hundred-watt-level high-power femtosecond fiber laser
摘要
Abstract
[Background]High-power femtosecond fiber lasers are essential tools for advanced applications in ultrafast science,precision manufacturing,and nonlinear optics.However,achieving hundred-watt-level output while maintaining high beam quality and short pulse duration remains challenging due to nonlinear effects and transverse mode instabilities.[Purpose]This work aims to develop a high-power femtosecond fiber laser system based on chirped-pulse amplification(CPA),using rod-type photonic crystal fiber as the gain medium,to achieve hundred-watt-level output with high efficiency and stable beam quality.[Methods]The system adopts a rod-type photonic crystal fiber as the main amplifier.Backward pumping combined with double-pass amplification in a single rod fiber is implemented to enhance pump-to-signal conversion efficiency.Nonlinear effects are mitigated by employing a large mode area fiber,short gain length,and proper chirped-pulse management.A double-grating compressor is used for final pulse compression.[Results]The amplifier achieves a pump-to-signal conversion efficiency exceeding 60%.The system delivers pulses with a central wavelength of 1 033 nm,a repetition rate of 1 MHz,a single-pulse energy of 162 μJ,and a pulse duration of 233 fs.The output beam ellipticity is better than 95%.The overall pump-to-compressed-signal efficiency reaches 54%.[Conclusions]The demonstrated system achieves high repetition rate,high average power,and ultrashort pulse duration simultaneously,providing a novel and practical scheme for hundred-watt-level femtosecond fiber lasers.This approach offers new opportunities for applications requiring stable,high-brightness ultrafast sources.关键词
高功率激光器/超快光纤激光/啁啾脉冲放大/光子晶体光纤Key words
high power laser/ultrafast fiber laser/chirped pulse amplification/photonic crystal fiber分类
信息技术与安全科学引用本文复制引用
谭欣,李逵,张晓世,赵变丽,徐智阳,张睿,周又阳,刘琦,南颖刚,李绍攀,杨皓..百瓦级飞秒棒状光子晶体光纤激光器[J].强激光与粒子束,2026,38(1):18-23,6.基金项目
云南省高校服务重点产业科技项目(FWCY-ZD2024002) （FWCY-ZD2024002）
国家自然科学基金青年科学基金项目(62505269) （62505269）
