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Proceedings Paper

Self-consistent electrical, thermal, and optical model of high-brightness tapered lasers
Author(s): Luis Borruel; Slawomir Sujecki; Ignacio Esquivias; Jim Wykes; Phillip Sewell; Trevor Mark Benson; Eric C. Larkins; Julia Arias; Beatriz Romero Herrero
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Paper Abstract

A quasi-3D model has been developed with the aim of studying the different factors limiting the performance of high-brightness high-power tapered lasers. The model solves the complete semiconductor and thermal equations, neglecting the flow of carriers and heat along the cavity ax is, together with a 2D Wide-Angle Beam Propagation method solving the optical propagation. The coupling between electrical, thermal and optical equations yields a stable solution which incorporates carrier and temperature induced perturbations of the refractive index. Although tapered lasers have already demonstrated superior beam quality performance in comparison with broad area devices, they still suffer of beam filamentation at high power levels. We analyze the influence of the different competing factors in the self-focusing process for 980 nm lasers with a gain guided taper section. The simulation results indicate that the lasers with the longest taper section provide the highest output power before the filamentation process is triggered, and that the backward propagating field plays a crucial role in the stability of the output beam.

Paper Details

Date Published: 12 June 2002
PDF: 12 pages
Proc. SPIE 4646, Physics and Simulation of Optoelectronic Devices X, (12 June 2002); doi: 10.1117/12.470535
Show Author Affiliations
Luis Borruel, Univ. Politecnica de Madrid (Spain)
Slawomir Sujecki, Univ. of Nottingham (United Kingdom)
Ignacio Esquivias, Univ. Politecnica de Madrid (Spain)
Jim Wykes, Univ. of Nottingham (United Kingdom)
Phillip Sewell, Univ. of Nottingham (United Kingdom)
Trevor Mark Benson, Univ. of Nottingham (United Kingdom)
Eric C. Larkins, Univ. of Nottingham (United Kingdom)
Julia Arias, Univ. Politecnica de Madrid (France)
Beatriz Romero Herrero, Univ. Politecnica de Madrid (Spain)


Published in SPIE Proceedings Vol. 4646:
Physics and Simulation of Optoelectronic Devices X
Peter Blood; Marek Osinski; Yasuhiko Arakawa, Editor(s)

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