A 1.8 kW high power all-fiber Raman oscillator  

作　　者：Chenchen Fan Xiulu Hao Yang Li Min Fu Zilun Chen Tianfu Yao Jinyong Leng Pu Zhou 

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha,China [2]Nanhu Laser Laboratory,National University of Defense Technology,Changsha,China [3]Hunan Provincial Key Laboratory of High Energy Laser Technology,Changsha,China

出　　处：《High Power Laser Science and Engineering》2024年第6期71-79,共9页高功率激光科学与工程(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.12174445 and 62061136013)

摘　　要：Fiber Bragg grating-based Raman oscillators are capable of achieving targeted frequency conversion and brightness enhancement through the provision of gain via stimulated Raman scattering across a broad gain spectrum. This capability renders them an exemplary solution for the acquisition of high-brightness, specialized-wavelength lasers. Nonetheless,the output power of all-fiber Raman oscillators is typically limited to several hundred watts, primarily due to limitations in injectable pump power and the influence of higher-order Raman effects, which is inadequate for certain application demands. In this study, we introduce an innovative approach by employing a graded-index fiber with a core diameter of up to 150 μm as the Raman gain medium. This strategy not only enhances the injectable pump power but also mitigates higher-order Raman effects. Consequently, we have successfully attained an output power of 1780 W for the all-fiber Raman laser at 1130 nm, representing the highest output power in Raman fiber oscillators with any configuration reported to date.

关 键 词：fiber laser graded-index fiber Raman oscillator stimulated Raman scattering 

分 类 号：TN248[电子电信—物理电子学] TN752