Analysis of lasing in gain medium based on four-energy level atomic model
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Published:2012
Issue:22
Volume:61
Page:220206
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ISSN:1000-3290
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Container-title:Acta Physica Sinica
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language:
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Short-container-title:Acta Phys. Sin.
Author:
Sun Bing-Bing ,Wu Bo ,Wang Hui ,Huang Zhi-Xiang ,Wu Xian-Liang , ,
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.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Reference19 articles.
1. Siegman A E 1986 Laser (California: Mill Valley)
2. Sargent III M, Scully M O, Lamb W E 1974 Laser Physics (Mass: Addison-Wesly Reading)
3. Yariv A 1997 Optical Electronics in Morden Communications (New York: Oxford Univ Press)
4. Einstein A 1917 Phys. Z. 18 121
5. Lamb W E 1964 Phys. Rev. A 134 1429