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Analysis of lasing in gain medium based on four-energy level atomic model

Sun Bing-Bing Wu Bo Wang Hui Huang Zhi-Xiang Wu Xian-Liang

Analysis of lasing in gain medium based on four-energy level atomic model

Sun Bing-Bing, Wu Bo, Wang Hui, Huang Zhi-Xiang, Wu Xian-Liang
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  • Received Date:  30 March 2012
  • Accepted Date:  17 June 2012
  • Published Online:  05 November 2012

Analysis of lasing in gain medium based on four-energy level atomic model

  • 1. Key Laboratory of Intelligent Computing and Signal Processing, Anhui University, Hefei 230039, China;
  • 2. Department of Physics and Electronic Engineering Hefei Normal University, Hefei 230061, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 60931002, 61101064, 51277001), the Distinguished Natural Science Foundation (Grant No. 1108085J01), the Universities Natural Science Foundation of Anhui Province (Grant Nos. KJ2011A002, KJ2011A242), and Financed by the 211 Project of Anhui University.

Abstract: With the present interest in metamaterial, gain medium shows promise for complex system due to their amplification effect and wide potential application area. In this paper we present a model that simulates lasing in gain medium by using a model of four-energy level atomic system based on the finite-difference time-domain method.Meanwhile we propose a new pump mechanism, i.e., Gaussian Pump. It is found that results of the spectra, lasing threshold and population dynamics of the new pump mechanism are in good agreement with theoretical results. The results can also provide reference for caculating more complex metamaterial system.

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