Intracavity CH4 Raman laser using negative-branch unstable resonator》.pdf

Optics Communications 356 (2015) 49–53 Contents lists available at ScienceDirect Optics Communications journal homepage: /locate/optcom Intracavity CH4 Raman laser using negative-branch unstable resonator Dongjian Zhou a,b, Jingwei Guo a,n, Canhua Zhou a, Jinbo Liu a, Dong Liu a,b, Yuqi Jin a a Key Laboratory of Chemical Lasers, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China b University of Chinese Academy of Sciences, Beijing 100049, PR China a r t i c l e i n f o a b s t r a c t Article history: An intracavity Q-switched Nd:YAG/CH4 Raman laser is realized based on the configuration of a negative- Received 27 April 2015 branch confocal unstable resonator. A numerical model of the bare resonator was introduced to simulate Received in revised form the fundamental transverse mode and calculate the loss of the fundamental resonator. With different 17 June 2015 magnifications of the fundamental resonator, the first Stokes output energy was presented as a function Accepted 12 July 2015 of the discharge voltage. The influence of the Stokes resonator on Raman conversion was analyzed. With Available online 29 July 2015 a fundamental resonator magnification of 1.1, a maximum output energy of 58 mJ was obtained, and the Keywords: corresponding photon conversion efficiency was 48%. Raman laser