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Some optical properties of four-level media via coherent and incoherent pumping fields
, Article Journal of the Optical Society of America B: Optical Physics ; Volume 30, Issue 3 , 2013 , Pages 641-648 ; 07403224 (ISSN) ; Asadpour, S. H ; Sadighi Bonabi, R ; Sharif University of Technology
Optical Society of American (OSA)
2013
Abstract
The optical properties of a four-level atomic system via coherent and incoherent pumping fields are investigated. The giant Kerr nonlinearity with reduced linear and nonlinear absorption, which has a major role in decreasing the threshold of optical bistability (OB), can be obtained with subluminal light propagation via adjusting the intensities of coupling fields. An incoherent pumping field is noticed to be an extra parameter to reduce the threshold of OB and multistability, and it can be used as an effective parameter in producing lasing with or without population inversion. In this model, optical multistability is achieved simply by tuning the intensity of coupling laser fields....
Optical bistability via quantum interference from incoherent pumping and spontaneous emission
, Article Journal of Luminescence ; Volume 131, Issue 11 , 2011 , Pages 2395-2399 ; 00222313 (ISSN) ; Asadpour, S. H ; Sadighi Bonabi, R ; Sharif University of Technology
Abstract
We theoretically investigate the optical bistability (OB) in a V-type three-level atomic system confined in a unidirectional ring cavity via incoherent pumping field. It is shown that the threshold of optical bistability can be controlled by the rate of an incoherent pumping field and by interference mechanism arising from the spontaneous emission and incoherent pumping field. We demonstrate that the optical bistability converts to optical multi-stability (OM) by the quantum interference mechanism