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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 7 — Mar. 31, 2008
  • pp: 4452–4464

Evolution from modal to spatially incoherent emission of a broad-area VCSEL

Shyam K. Mandre, Wolfgang Elsäßer, Ingo Fischer, Michael Peeters, and Guy Verschaffelt  »View Author Affiliations


Optics Express, Vol. 16, Issue 7, pp. 4452-4464 (2008)
http://dx.doi.org/10.1364/OE.16.004452


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Abstract

Broad-area vertical-cavity surface-emitting lasers (BA-VCSELs) can exhibit a state of spatially incoherent emission, as we recently reported in [M. Peeters et al., Opt. Express, 13, 9337 (2005)]. Here, we experimentally study the evolution of a BA-VCSEL under pulsed operation from well-defined modal emission with a multitude of transverse cavity modes to such spatially incoherent emission. The transition is studied using a high-speed intensified CCD camera and differential image analysis with which single-shot measurements of the imaged nearfield, farfield, spatial coherence, and spectral emission properties are acquired. This combination of experimental characterization tools allows for a detailed description of the BA-VCSEL’s emission behavior, which is necessary for an in-depth understanding of the processes involved. We find the interplay between the thermal chirp and the build-up of a spatially distributed thermal lens to be decisive for the break-up of the global cavity modes.

© 2008 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(030.4070) Coherence and statistical optics : Modes
(190.3100) Nonlinear optics : Instabilities and chaos
(140.7260) Lasers and laser optics : Vertical cavity surface emitting lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 9, 2007
Revised Manuscript: January 8, 2008
Manuscript Accepted: January 8, 2008
Published: March 18, 2008

Citation
Shyam K. Mandre, Wolfgang Elsäßer, Ingo Fischer, Michael Peeters, and Guy Verschaffelt, "Evolution from modal to spatially incoherent emission of a broad-area VCSEL," Opt. Express 16, 4452-4464 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-7-4452


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References

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