Lasing without inversion in the absence of a coherent coupling field

Vemuri, Gautam ; Vasavada, K. V. ; Agarwal, G. S. (1995) Lasing without inversion in the absence of a coherent coupling field Physical Review A, 52 (4). pp. 3228-3230. ISSN 1050-2947

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Official URL: http://pra.aps.org/abstract/PRA/v52/i4/p3228_1

Related URL: http://dx.doi.org/10.1103/PhysRevA.52.3228

Abstract

We analyze the inversionless gain in a three-level ladder system by replacing the usual coherent coupling field with an incoherent field. Surprisingly, it is found that one can obtain inversionless amplification of a weak probe even in the absence of a coherent field in the model. We conclude that gain is determined by the ensemble average of the product of the two-photon coherence and the "effective Rabi frequency" of the field. Thus, even though the incoherent pump reduces the two-photon coherence, gain can be restored by choosing sufficiently high strengths of the incoherent field.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:90425
Deposited On:10 May 2012 09:46
Last Modified:10 May 2012 09:46

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