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Chinese Physics, 2007, Vol. 16(11): 3370-3376    DOI: 10.1088/1009-1963/16/11/037

Modelling of passively Q-switched lasers with intracavity Raman conversion

Su Fu-Fang(苏富芳), Zhang Xing-Yu(张行愚), Wang Qing-Pu(王青圃), Chang Jun(常军), Jia Peng(贾鹏), Li Shu-Tao(李述涛), Zhang Xiao-Lei(张晓磊), and Cong Zhen-Hua(丛振华)
School of Information Science and Engineering, Shandong University, Jinan 250100, China
Abstract  We present a model of passively Q-switched Raman lasers by utilizing the rate equations. The intracavity fundamental photon density, Raman photon density and the initial population-inversion density of the gain medium are assumed to be of Gaussian spatial distributions. These rate equations are normalized by introducing some synthetic parameters and solved numerically, and a group of general curves are generated. From these curves we can understand the dependence of the Raman laser pulse characteristics on the parameters about the pumping, the gain medium, the Raman medium and the resonator. An illustrative calculation for a passively Q-switched Nd$^{3 + }$:GdVO$_{4}$ self-Raman laser is presented to demonstrate the usage of the curves and related formulas.
Keywords:  intracavity Raman lasers      passively Q-switched      rate equation      numerical modelling  
Accepted manuscript online: 
PACS:  42.55.Rz (Doped-insulator lasers and other solid state lasers)  
  42.55.Ah (General laser theory)  
  42.55.Ye (Raman lasers)  
  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  
  42.60.Gd (Q-switching)  
  42.65.Dr (Stimulated Raman scattering; CARS)  

Cite this article: 

Su Fu-Fang(苏富芳), Zhang Xing-Yu(张行愚), Wang Qing-Pu(王青圃), Chang Jun(常军), Jia Peng(贾鹏), Li Shu-Tao(李述涛), Zhang Xiao-Lei(张晓磊), and Cong Zhen-Hua(丛振华) Modelling of passively Q-switched lasers with intracavity Raman conversion 2007 Chinese Physics 16 3370

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