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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4595–4598

Cavity-controlled spectral singularity

K. Nireekshan Reddy and S. Dutta Gupta  »View Author Affiliations

Optics Letters, Vol. 39, Issue 15, pp. 4595-4598 (2014)

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We study theoretically a parity-time (PT)-symmetric, saturable, balanced gain–loss system in a ring-cavity configuration. The saturable gain and loss are modeled by a two-level medium with or without population inversion. We show that the specifics of the spectral singularity can be fully controlled by the cavity and the atomic detuning parameters. The theory is based on the mean-field approximation, as in the standard theory of optical bistability. Further, in the linear regime we demonstrate the regularization of the singularity in detuned systems, while larger input power levels are shown to be adequate to limit the infinite growth in absence of detunings.

© 2014 Optical Society of America

OCIS Codes
(190.1450) Nonlinear optics : Bistability
(230.4555) Optical devices : Coupled resonators
(130.4815) Integrated optics : Optical switching devices

ToC Category:
Nonlinear Optics

Original Manuscript: May 27, 2014
Revised Manuscript: July 2, 2014
Manuscript Accepted: July 2, 2014
Published: July 31, 2014

K. Nireekshan Reddy and S. Dutta Gupta, "Cavity-controlled spectral singularity," Opt. Lett. 39, 4595-4598 (2014)

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