A continuous-wave Nd:YVO_(4)-KGW intracavity Raman laser with over 34% diode-to-Stokes optical efficiency  

作　　者：Quan Sheng Jingni Geng Tianchang Liu Shijie Fu Wei Shi Jianquan Yao 

机构地区：[1]Institute of Laser and Optoelectronics,School of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin,China [2]Key Laboratory of Optoelectronic Information Technology(Ministry of Education),Tianjin University,Tianjin,China

出　　处：《High Power Laser Science and Engineering》2024年第2期62-68,共7页高功率激光科学与工程（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.61975146,62105240,62075159,and 62275190);the Shandong Province Key R&D Program(Nos.2020CXGC010104 and 2021CXGC010202);the Seed Foundation of Tianjin University(No.2023XPD-0020).

摘　　要：We demonstrate a continuous-wave(CW)Nd:YVO_(4)-potassium gadolinium tungstate(KGW)intracavity Raman laser with a diode-to-Stokes optical efficiency of 34.2%.By optimizing the cavity arrangement and reducing the cavity losses,8.47 W Stokes output at 1177 nm was obtained under an incident 878.6 nm diode pump power of 24.8 W.The influence of cavity losses on the power and efficiency of the CW Raman laser,as well as the potential for further optimization,was investigated based on the numerical model.The observation of thermally-induced output rollover was well explained by the calculation of the thermal lensing and cavity stability,indicating that the end-face curvature played an important role when the end-face of the crystal was highly reflective coated to make the cavity.A 10.9 W Stokes output under 40.9 W incident pump was also demonstrated with a cavity arrangement less sensitive to the end-face curvature,which is the highest output power of CW intracavity Raman lasers reported.

关 键 词：continuous wave intracavity Raman laser KGW crystal thermal lens 

分 类 号：TN248[电子电信—物理电子学]