Modelling of passively Q-switched lasers with intracavity Raman conversion

• 来源期刊: 中国物理B（英文版）
• 关键词: intracavity Raman lasers passively Q-switched rate equation numerical modelling
• 年，卷（期）: 2007,（11）
• 页码范围: 3370-3376
• 页数: 7页
• 语种: 英文

摘要

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 Nd3%%:GdVO4 self-Raman laser is presented to demonstrate the usage of the curves and related formulas.