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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 25 — Dec. 11, 2006
  • pp: 12373–12379

Two-wave mixing in a broad-area semiconductor amplifier

Mingjun Chi, Søren Blaaberg Jensen, Jean-Pierre Huignard, and Paul Michael Petersen  »View Author Affiliations

Optics Express, Vol. 14, Issue 25, pp. 12373-12379 (2006)

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The two-wave mixing in the broad-area semiconductor amplifier was investigated, both theoretically and experimentally. In detail we investigated how the optical gain is affected by the presence of the two-wave mixing interference grating. In the experimental setup we are able to turn on and off the interference pattern in the semiconductor amplifier. This arrangement allows us to determine the two-wave mixing gain. The coupled-wave equations of two-wave mixing were derived based on the Maxwell’s wave equation and rate equation of the carrier density. The analytical solutions of the coupled-wave equations were obtained in the condition of small signal and the total intensity is far below the saturation intensity of the amplifier. The results show that when the amplifier is operated below transparency we obtain an increase in the optical gain, and when the amplifier is operated above transparency we obtain a decrease in the optical gain. The experimental results obtained in an 810 nm, 200 µm wide GaAlAs amplifier show good agreement with the theory. A diffusion length of 2.0 µm is determined from the experiment.

© 2006 Optical Society of America

OCIS Codes
(140.3280) Lasers and laser optics : Laser amplifiers
(140.5960) Lasers and laser optics : Semiconductor lasers
(190.7070) Nonlinear optics : Two-wave mixing

ToC Category:
Nonlinear Optics

Original Manuscript: October 6, 2006
Revised Manuscript: November 20, 2006
Manuscript Accepted: November 20, 2006
Published: December 11, 2006

Mingjun Chi, Søren B. Jensen, Jean-Pierre Huignard, and Paul Michael Petersen, "Two-wave mixing in a broad-area semiconductor amplifier," Opt. Express 14, 12373-12379 (2006)

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