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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 17 — Sep. 1, 2006
  • pp: 2574–2576

Measurements of the α factor of a distributed-feedback quantum cascade laser by an optical feedback self-mixing technique

Jens von Staden, Tobias Gensty, Wolfgang Elsäßer, Guido Giuliani, and Christian Mann  »View Author Affiliations


Optics Letters, Vol. 31, Issue 17, pp. 2574-2576 (2006)
http://dx.doi.org/10.1364/OL.31.002574


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Abstract

We demonstrate measurements of the α factor of a distributed-feedback quantum cascade laser (QCL) by using a newly modified self-mixing interferometric technique exploring the laser itself as the detector. We find a strong dependence of the α factor on the injection current, ranging from 0.44 at 120 mA to 2.29 at 180 mA , which can be attributed to the inherent physics of QCLs.

© 2006 Optical Society of America

OCIS Codes
(040.5570) Detectors : Quantum detectors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5960) Lasers and laser optics : Semiconductor lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 7, 2006
Revised Manuscript: June 1, 2006
Manuscript Accepted: June 7, 2006
Published: August 9, 2006

Citation
Jens von Staden, Tobias Gensty, Wolfgang Elsäßer, Guido Giuliani, and Christian Mann, "Measurements of the α factor of a distributed-feedback quantum cascade laser by an optical feedback self-mixing technique," Opt. Lett. 31, 2574-2576 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-17-2574


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