Field stabilization of pulse duration in a hundredfemtosecond level  

作　　者：Runmin Liu Yong Wu Guoqing Pu Jiayang Cheng Huan Mu Bowen Liu Lilin Yi Minglie Hu 刘润民;吴勇;蒲国庆;成嘉阳;慕桓;刘博文;义理林;胡明列(Ultrafast Laser Laboratory,Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education,School of Precision Instruments and Opto-electronics Engineering,Tianjin University,Tianjin 300072,China;State Key Laboratory of Advanced Communication Systems and Networks,School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;R&D Center,AIOPTICS Company Limited,Shanghai 200240,China)

机构地区：[1]Ultrafast Laser Laboratory,Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education,School of Precision Instruments and Opto-electronics Engineering,Tianjin University,Tianjin 300072,China [2]State Key Laboratory of Advanced Communication Systems and Networks,School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [3]R&D Center,AIOPTICS Company Limited,Shanghai 200240,China

出　　处：《Chinese Optics Letters》2024年第8期93-99,共7页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61827821 and 62227821)。

摘　　要：Pulse duration is considered as one of the most important characteristics of high-power femtosecond lasers.However,pulses output from the laser system are susceptible to ambient changes and manifest the instability of pulse durations in an open environment.In this paper,incorporating the algorithmic framework of the improved stochastic hill-climbing search and incremental proportional-integral controller,temperature-induced fluctuations of pulse duration can be effectively compensated by an automatic feedback control in an all-fiber chirped-pulse amplification system.In the experiment,sub-hundred femtosecond fluctuation of pulse duration is introduced to verify the performance robustness of the proposed pulse-duration feedback control(PDFC).The stability of pulse duration is obviously higher than the case without the feedback control,and the peak-to-peak fluctuation of pulse duration is reduced to 6.5%.Furthermore,the robust switching between different pulse durations proves the versatility of the PDFC.We expect that the proposed feedback control method could provide a novel insight into high-power femtosecond lasers widely applied in fundamental researches and industrial fields.

关 键 词：fiber amplifier femtosecond laser pulse-duration feedback control 

分 类 号：TN248[电子电信—物理电子学]