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Effect of spontaneously generated coherence on transient evolution of LWI gain in an open Ladder type system

Lu Hong-Wu Yang Yan-Ling Wang Lei Liu Zhong-Bo Fan Xi-Jun

Effect of spontaneously generated coherence on transient evolution of LWI gain in an open Ladder type system

Lu Hong-Wu, Yang Yan-Ling, Wang Lei, Liu Zhong-Bo, Fan Xi-Jun
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  • Received Date:  23 March 2008
  • Accepted Date:  26 April 2008
  • Published Online:  20 May 2009

Effect of spontaneously generated coherence on transient evolution of LWI gain in an open Ladder type system

  • 1. (1)山东师范大学传播学院,济南 250014; (2)山东师范大学物理与电子科学学院,济南 250014

Abstract: The effect of spontaneously generated coherence (SGC) on transient evolution of gain of lasing without inversion (LWI) and modulation roles of the injection rate ratio and exit rate on SGC-dependent gain in an open Ladder type three level system are studied by using the numerical solution of the density matrix motion equation of the system. It was shown that: variation of SGC strength will make the transient and final stationary gains having a considerable changing; when incoherent pumping presents, LWI gain increases with the ratio of injection rates and exit rate decreasing, however, when incoherent pumping is absent, the case is just the opposite; by choosing suitable values of SGC strength, the injection rate ratio and exit rate, we can obtain the largest transient and final stationary gain.

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