单频光纤放大器中泵浦作用的相位噪声  

Phase noise of pumping in single-frequency fiber amplifier

作　　者：段良友 刘贞 沈琪皓[1] 何幸锴[1] 周鼎富[1] 张永科[1] Duan Liangyou;Liu Zhen;Shen Qihao;He Xingkai;Zhou Dingfu;Zhang Yongke(Southwest Institute of Technical and Physics,Chengdu 610041,China)

机构地区：[1]西南技术物理研究所,四川成都610041

出　　处：《红外与激光工程》2023年第1期116-125,共10页Infrared and Laser Engineering

基　　金：国家重点研究开发计划重大科学仪器设备发展重点专项(2018YFF01014100)。

摘　　要：研究了铒镱共掺单频光纤放大器中100 Hz~1 kHz频段内的相位噪声,并通过实验证明该尖峰噪声为泵浦电源产生的相位噪声。从铒镱共掺光纤放大器的功率传输方程出发、结合泵浦激光的热传递函数,数值分析了泵浦功率、泵浦波长、增益光纤长度对100 Hz~1 kHz频段内相位噪声的影响。通过二级光放大结构对输出激光的相位噪声进行测量,并将实验结果与数值仿真结果进行对比,证明了理论模型的可靠性。该研究优化了主谐振功率放大结构铒镱共掺单频光纤放大器的相位噪声特性、并为提高相干合成时的合束效率提供指导。以上所得结果普遍适用于主谐振功率放大结构的光纤放大器。The phase noise in the 100 Hz-1 kHz band of erbium-ytterbium co-doped single-frequency fiber amplifier was studied, and it was proved by experiments that the peak noise was the phase noise produced by the pump power supply. Based on the power transfer equations of erbium-ytterbium co-doped fiber amplifier and the heat transfer function of pump laser, the effects of pump power, pump wavelength and gain fiber length on the phase noise in 100 Hz-1 kHz band were analyzed numerically. The phase noise of the output laser was measured by using two-stage optical amplifier structure, and the experimental results were compared with the numerical simulation results, which proved the reliability of the theoretical model. This study optimized the phase noise characteristics of erbium-ytterbium co-doped single-frequency fiber amplifier with main resonance power amplifier structure and provided guidance for improving beam combining efficiency in coherent combination. In general, the aforementioned findings hold true for fiber amplifiers with main oscillation power amplification structure.

关 键 词：相位噪声 主谐振功率放大 功率传输方程 泵浦强度噪声 铒镱共掺光纤 

分 类 号：TN248[电子电信—物理电子学]