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Proceedings Paper

Finite difference beam propagation model for tapered waveguide with intracavity lens
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Paper Abstract

A finite difference beam prop0agation mode is used in conjunction with laser rate equation simulations to study the inclusion of an intracavity lens in a high-power tapered ridge waveguide laser diode emitting at 980 nm. A parabolic lens is introduced in the top of the ridge near the front facet via a change in the waveguide effective refractive index profile. The inclusion of the lens has led to 13 percent reduction in the threshold current and an improved power slope efficiency from 0.4 W/A up to 0.8 W/A. The lens has caused near field broadening of 2 micrometers at full width half maximum power, indicating more efficient use of the cavity. The far field has narrowed by 1 degree indicating higher brightness. The model uses a mesh for reach of its points the standard carrier rate equation is solved across the active layer. The 2D wave equation is solved for the two counter propagating fields using a finite difference algorithm. The result of the does how good agreement with experiment.

Paper Details

Date Published: 9 July 2001
PDF: 8 pages
Proc. SPIE 4283, Physics and Simulation of Optoelectronic Devices IX, (9 July 2001); doi: 10.1117/12.432613
Show Author Affiliations
Atef M. Rashed, Univ. of Bristol (United Kingdom)
Kevin A. Williams, Univ. of Bristol (United Kingdom)
Richard V. Penty, Univ. of Bristol (United Kingdom)
Ian H. White, Univ. of Bristol (United Kingdom)

Published in SPIE Proceedings Vol. 4283:
Physics and Simulation of Optoelectronic Devices IX
Yasuhiko Arakawa; Peter Blood; Marek Osinski, Editor(s)

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