Understanding low-threshold mode-locking at multi-GHz repetition rate

被引：0
|
作者：
Wenbin He [1 ]
Meng Pang [1 ]
Philip St. J. Russell [2 ]
机构：
[1] Chinese Academy of Sciences,Russell Centre for Advanced Lightwave Science, Shanghai Institute of Optics and Fine Mechanics and Hangzhou Institute of Optics and Fine Mechanics
[2] Shanghai Institute of Optics and Fine Mechanics CAS,State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra
来源：
Light: Science & Applications | / 14卷 / 1期
关键词：
D O I：
10.1038/s41377-024-01682-0
中图分类号：
学科分类号：
摘要：
Continuous-wave mode-locking at multi-GHz repetition rates is achieved in an ultrashort laser cavity at critical pulse energies 100 times lower than predicted by conventional theory. The authors reveal that dynamic gain depletion and recovery between consecutive round-trips is the key factor behind a low-pulse-energy transition from Q-switched mode-locking (QSML) to continuous-wave mode-locking (CWML). As well as providing new insight into gain dynamics, the results suggest a practical route to low-threshold lasing at very high-repetition rates.
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