Linewidth narrowing in free-space-running diamond Brillouin lasers

作     者：Duo Jin Zhenxu Bai Zhongan Zhao Yifu Chen Wenqiang Fan Yulei Wang Richard P.Mildren Zhiwei Lü Duo Jin;Zhenxu Bai;Zhongan Zhao;Yifu Chen;Wenqiang Fan;Yulei Wang;Richard P.Mildren;Zhiwei Lü

作者机构：Center for Advanced Laser TechnologyHebei University of TechnologyTianjinChina Hebei Key Laboratory of Advanced Laser Technology and EquipmentTianjinChina MQ Photonics Research CentreDepartment of Physics and AstronomyMacquarie UniversitySydneyAustralia 

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：2023年第11卷第4期

页      面：25-32页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：the National Natural Science Foundation of China(No.61927815) the Natural Science Foundation of Tianjin City(Nos.22JCYBJC01100 and 20JCZDJC00430) the Shijiazhuang Overseas Talents Introduction Project(No.20230004) the Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices(No.KF202201) Funds for Basic Scientific Research of Hebei University of Technology(No.JBKYTD2201) D.J.acknowledges the support from the Postgraduate Innovation Ability Training Program of Hebei Province(No.CXZZBS2021030) R.P.M.acknowledges the support from the Asian Office of Aerospace Research and Development(AOARD) 

主　　题：high power narrow linewidth single-frequency laser stimulated Brillouin scattering 

摘      要：This study analyzes the linewidth narrowing characteristics of free-space-running Brillouin lasers and investigates the approaches to achieve linewidth compression and power enhancement *** results show that the Stokes linewidth behavior in a free-space-running Brillouin laser cavity is determined by the phase diffusion of the pump and the technical noise of the ***,a Stokes light output with a power of 22.5 W and a linewidth of 3.2 kHz was obtained at a coupling mirror reflectivity of 96%,which is nearly 2.5 times compressed compared with the linewidth of the pump(7.36 kHz).In addition,the theorical analysis shows that at a pump power of 60Wand a coupling mirror reflectivity of 96%,a Stokes output with a linewidth of 1.6 kHz and up to 80%optical conversion efficiency can be achieved by reducing the insertion loss of the *** study provides a promising technical route to achieve high-power ultra-narrow linewidth special wavelength laser radiations.