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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 5, Iss. 3 — Aug. 2, 1999
  • pp: 38–47

Transverse modes in oxide confined VCSELs: Influence of pump profile, spatial hole burning, and thermal effects

C. Degen, I. Fischer, and W. Elsäßer  »View Author Affiliations

Optics Express, Vol. 5, Issue 3, pp. 38-47 (1999)

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We present experimental studies on the transverse mode emission behaviour of oxide-conned Vertical Cavity Surface Emitting Lasers (VCSELs). VCSELs with aperture diameters of 6µm and 11µm exhibit a wide variety of emission patterns from low order Hermite-Gaussian modes to high order Laguerre-Gaussian modes. We obtain detailed information about the spatial gain distribution by recording spontaneous emission intensity profiles during lasing operation. We conclude from these profiles, that the spatial carrier distribution is primarily governed by the influence of pump induced current spreading and is only secondarily influenced by further effects such as spatial hole burning, and thermal gradients in the laser. The combination of these mechanisms causes a strong tendency towards the emission of high order transverse modes.

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OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.2020) Lasers and laser optics : Diode lasers
(140.5960) Lasers and laser optics : Semiconductor lasers
(250.7260) Optoelectronics : Vertical cavity surface emitting lasers

ToC Category:
Focus Issue: Spatial and Polarization Dynamics of Semiconductor Lasers

Original Manuscript: March 30, 1999
Published: August 2, 1999

Christian Degen, W. Elsaber, and Ingo Fischer, "Transverse modes in oxide confined VCSELs: Influence of pump profile, spatial hole burning, and thermal effects," Opt. Express 5, 38-47 (1999)

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