Investigations of a 439 W Narrow-Linewidth Er/Yb Fiber Amplifier Pumped by 1018 nm Fiber Lasers

作     者：Li, Guanzhong Li, Dan Cai, Yuexuan Fu, Guohao Yu, Weilong Li, Pei Xiao, Qirong Gong, Mali Yan, Ping 

作者机构：Tsinghua Univ Dept Precis Instrument Beijing 100084 Peoples R China State Key Lab Precis Space Time Informat Sensing T Beijing 100084 Peoples R China Tsinghua Univ Key Lab Photon Control Technol Minist Educ Beijing 100084 Peoples R China 

出 版 物：《JOURNAL OF LIGHTWAVE TECHNOLOGY》 (J Lightwave Technol)

年 卷 期：2025年第43卷第9期

页      面：4491-4499页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [62122040, 61875103, 62075113] National Key Technology Research & Development Program [2023YFB4604501] 

主　　题：Laser excitation Ions Optical fiber amplifiers Pump lasers Fiber lasers Power lasers Laser modes Power amplifiers Optical fiber communication Power generation Er/Yb co-doped fiber excited state absorption fiber amplifiers pair-induced quenching 

摘      要：In this paper, a 439 W, 1567 nm, narrow-linewidth Er/Yb co-doped fiber (EYDF) laser system pumped by 1018 nm fiber lasers is demonstrated. The 1018 nm fiber lasers are utilized as pumping source to suppress the similar to 1 mu m amplified spontaneous emission. It is the highest output power reported for EYDF lasers to date. A novel EYDF model considering the pair-induced quenching (PIQ) and the excited state absorption (ESA) of Er ions is built to predict the experiment more accurately. Simulation results reveal that ESA and PIQ both contribute to the decline of laser efficiency. Moreover, the scheme of the main amplifier is optimized theoretically based on the model to reach higher output power.