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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 4 — Feb. 14, 2011
  • pp: 3418–3433

Spectral behavior of partially pumped weakly scattering random lasers

Jonathan Andreasen and Hui Cao  »View Author Affiliations


Optics Express, Vol. 19, Issue 4, pp. 3418-3433 (2011)
http://dx.doi.org/10.1364/OE.19.003418


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Abstract

Stochastic noise is incorporated in the numerical simulation of weakly scattering random lasers, which qualitatively captures lasing phenomena that have been observed experimentally. We examine the behavior of the emission spectrum while pumping only part of the entire one-dimensional random system. A decrease in the density of lasing states is the dominant mechanism for observing discrete lasing peaks when absorption exists in the unpumped region. Without such absorption, the density of lasing states does not reduce as dramatically but the statistical distribution of (linear) lasing thresholds is broadened. This may facilitate incremental observation of lasing in smaller-threshold modes in the emission spectrum with fine adjustments of the pumping rate.

© 2011 Optical Society of America

OCIS Codes
(030.4070) Coherence and statistical optics : Modes
(140.3460) Lasers and laser optics : Lasers
(260.2710) Physical optics : Inhomogeneous optical media

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 20, 2010
Revised Manuscript: February 3, 2011
Manuscript Accepted: February 3, 2011
Published: February 7, 2011

Citation
Jonathan Andreasen and Hui Cao, "Spectral behavior of partially pumped weakly scattering random lasers," Opt. Express 19, 3418-3433 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-4-3418


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