Investigation on extreme frequency shift in silica fiber-based high-power Raman fiber laser

作     者：Jiaxin Song Hanshuo Wu Jun Ye Hanwei Zhang Jiangming Xu Pu Zhou Zejin Liu 

作者机构：College of Optoelectronic Science and Engineering National University of Defense Technology 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2018年第6卷第2期

页      面：103-109页

核心收录：

学科分类：0302[法学-政治学] 03[法学] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported in part by the Huo Yingdong Education Foundation of China(No.151062) in part by the Foundation for the author of National Excellent Doctoral Dissertation of China(No.201329) in part by the National Natural Science Foundation of China(No.61635005) 

主　　题：linearly polarized laser Raman fiber laser Raman gain spectrum 

摘      要：In this paper, we experimentally investigated the extreme frequency shift in high-power Raman fiber laser(RFL). The RFL was developed by using a pair of fiber Bragg gratings with fixed and matched central wavelength(1120 nm)combined with a piece of 31-m-long polarization maintaining(PM) passive fiber adopted as Raman gain *** pump source was a homemade high-power, linearly polarized(LP) wavelength-tunable master oscillator power amplifier(MOPA) source with ～25 nm tunable working range(1055–1080 nm). High-power and high-efficiency RFL with extreme frequency shift between the pump and Stokes light was explored. It is found that frequency shift located within 10.6 THz and 15.2 THz can ensure efficient Raman lasing, where the conversion efficiency is more than 95% of the maximal value, 71.3%. In addition, a maximum output power of 147.1 W was obtained with an optical efficiency of71.3%, which is the highest power ever reported in LP RFLs to the best of our knowledge.