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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 4 — Feb. 1, 2013
  • pp: 659–665

Characterization of one-dimensional lasing in semiconductor disordered nanopowders

Peyman Rafiee, Gholamhossein Haghighat, and Vahid Ahmadi  »View Author Affiliations

Applied Optics, Vol. 52, Issue 4, pp. 659-665 (2013)

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In this paper, we present characteristics of one-dimensional ZnO-based random lasers by using a time-domain traveling-wave model. The results reveal that by increasing pump intensity, at first the number of laser modes is increased, and then it gets saturated. Also, output intensity shows that by increasing pump pulse width at a fixed pump intensity, laser modes are made to appear; at first, by raising pump pulse width, more laser modes appear, and then the intensity of the output spectrum is increased. Additionally, we show that by nonuniform pumping, a single-mode laser can be achieved. Through investigation of the nanopowder’s average size, we show that the output spectrum has its highest intensity and the sharpest laser modes for average nanopowder sizes less than 100 nm. Moreover, the results show that by decreasing pump area, lasing threshold is inclined.

© 2013 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(140.3410) Lasers and laser optics : Laser resonators
(140.4780) Lasers and laser optics : Optical resonators

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 15, 2012
Revised Manuscript: December 13, 2012
Manuscript Accepted: December 20, 2012
Published: January 30, 2013

Peyman Rafiee, Gholamhossein Haghighat, and Vahid Ahmadi, "Characterization of one-dimensional lasing in semiconductor disordered nanopowders," Appl. Opt. 52, 659-665 (2013)

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