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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 22 — Oct. 27, 2008
  • pp: 17848–17853

Generation of optical pulses in VCSELs below the static threshold using asymmetric current modulation

J. Zamora-Munt and C. Masoller  »View Author Affiliations

Optics Express, Vol. 16, Issue 22, pp. 17848-17853 (2008)

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We present a novel method for the generation of sub-nanosecond optical pulses in directly modulated vertical-cavity surface-emitting lasers (VCSELs) that operate, on average, below the cw threshold. Using the spin-flip model we demonstrate that irregular optical pulses in two orthogonal linear polarizations can be generated via asymmetric triangular modulation of period of a few nanoseconds, with a slow rising ramp followed by a fast decreasing one. For an optimal modulation asymmetry the effective threshold reduction is about 20%, the pulse amplitude is maximum and the dispersion of the pulse amplitude is minimum.

© 2008 Optical Society of America

OCIS Codes
(140.3430) Lasers and laser optics : Laser theory
(250.7260) Optoelectronics : Vertical cavity surface emitting lasers
(270.3100) Quantum optics : Instabilities and chaos

ToC Category:

Original Manuscript: July 8, 2008
Revised Manuscript: October 15, 2008
Manuscript Accepted: October 16, 2008
Published: October 20, 2008

J. Zamora-Munt and C. Masoller, "Generation of optical pulses in VCSELs below the static threshold using asymmetric current modulation," Opt. Express 16, 17848-17853 (2008)

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Fig. 1. Fig. 2. Fig. 3.

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