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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 26 — Dec. 21, 2009
  • pp: 24282–24287

Quantum cascade laser gain enhancement by front facet illumination

Gang Chen, Clyde G. Bethea, and Rainer Martini  »View Author Affiliations


Optics Express, Vol. 17, Issue 26, pp. 24282-24287 (2009)
http://dx.doi.org/10.1364/OE.17.024282


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Abstract

Optical gain enhancement is demonstrated in a standard mid-infrared quantum cascade laser in pulse operation, using a near infrared illumination on the laser facet. An increase in the laser emission is observed, as well as greater dynamic range, threshold reduction, and a blue shift in the laser cavity modes. The optically induced gain increase allows for optical switching of the laser. All the changes have a nonlinear dependency on the illumination optical power and are attributed to the free carrier concentration increase and the electron transport change in the active region due to the near infrared illumination.

© 2009 OSA

OCIS Codes
(230.4110) Optical devices : Modulators
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
(250.6715) Optoelectronics : Switching

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: August 14, 2009
Revised Manuscript: October 12, 2009
Manuscript Accepted: October 12, 2009
Published: December 18, 2009

Citation
Gang Chen, Clyde G. Bethea, and Rainer Martini, "Quantum cascade laser gain enhancement by front facet illumination," Opt. Express 17, 24282-24287 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-26-24282


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