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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 6 — Feb. 20, 2013
  • pp: 1317–1324

Time-dependent theory for random lasers in the presence of an inhomogeneous broadened gain medium such as PbSe quantum dots

Abbas Ghasempour Ardakani, Seyed Mohammad Mahdavi, and Ali Reza Bahrampour  »View Author Affiliations


Applied Optics, Vol. 52, Issue 6, pp. 1317-1324 (2013)
http://dx.doi.org/10.1364/AO.52.001317


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Abstract

Time-dependent model is presented to simulate random lasers in the presence of an inhomogeneous gain medium. PbSe quantum dots (QDs) with an arbitrary size distribution are treated as an inhomogeneous gain medium. By introducing inhomogeneity of the PbSe QDs in polarization, rate, and Maxwell’s equations, our model is constructed for a one-dimensional disordered system. By employing the finite difference time-domain method, the governing equations are numerically solved and lasing spectra and spatial distribution of the electric field are calculated. The effect of increasing the pumping rate on the laser characteristics is investigated. The results show that the number of lasing modes and their intensities increase with pumping rate. It is also demonstrated that the emission spectra depend on the standard deviation of the Gaussian distribution function. Increasing the standard deviation leads to reduction of the laser intensity.

© 2013 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3430) Lasers and laser optics : Laser theory

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 5, 2012
Revised Manuscript: January 6, 2013
Manuscript Accepted: January 17, 2013
Published: February 18, 2013

Citation
Abbas Ghasempour Ardakani, Seyed Mohammad Mahdavi, and Ali Reza Bahrampour, "Time-dependent theory for random lasers in the presence of an inhomogeneous broadened gain medium such as PbSe quantum dots," Appl. Opt. 52, 1317-1324 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-6-1317

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