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Proceedings Paper

FD-BPM modeling of vertical-cavity surface-emitting lasers
Author(s): Hans Krishna Bissessur; Kenichi Iga
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Paper Abstract

A self-consistent 3D model using the finite difference beam propagation method in cylindrical coordinates is presented to assess the performance of vertical cavity surface emitting lasers. It calculates the optical field pattern, output power, carrier distribution in the active layer and secondary mode excess loss. Optical diffraction and scattering are automatically included in the propagation, as well as carrier diffusion and spatial hole burning. Calculations using this model clearly show the advantage of current confinement by oxidation over proton implantation. The threshold current in oxide confined devices is predicted to reach a minimum at aperture diameters around typically 1.5 to 2.0 micrometers with a (lambda) /4 oxidized AlAs layer, compared to 12 micrometers in proton-implanted ones. The oxide thickness can still be optimized to minimize scattering losses. Tapered oxide profiles can also be considered. For current aperture diameters below 4 micrometers , single-mode behavior around threshold can be expected. Above threshold, the secondary mode rejection ratio is largely influenced by carrier diffusion which partly washes out the carrier inhomogeneity caused by spatial hole burning.

Paper Details

Date Published: 6 June 1997
PDF: 9 pages
Proc. SPIE 2994, Physics and Simulation of Optoelectronic Devices V, (6 June 1997);
Show Author Affiliations
Hans Krishna Bissessur, Tokyo Institute of Technology (Japan)
Kenichi Iga, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 2994:
Physics and Simulation of Optoelectronic Devices V
Marek Osinski; Weng W. Chow, Editor(s)

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