3 April 2000 Modeling of facet heating in high-power laser diodes
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Proceedings Volume 3889, Advanced High-Power Lasers; (2000) https://doi.org/10.1117/12.380947
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan
Facet heating is an important mechanism limiting the performance of high power laser diodes. The temperature increase at the laser facets contributes to the gradual degradation and can lead to Catastrophical Optical Damage (COD). We present a two-dimensional optoelectronic and thermal model for Fabry-Perot Quantum Well power lasers. The model is applied to 808 nm AlGaAs laser bars, with the aim of identifying the main volume and facet heating sources. The results of the simulation show that the heating caused by free-carrier absorption is the main source that could be minimized by a proper layer design. We present a new physical mechanism leading to COD: optical absorption at the facets produces carrier accumulation that can trigger the thermal runaway process.
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Beatriz Romero Herrero, Gustavo Batko, Julia Arias, Luis Borruel, Ignacio Esquivias, Rafael Gomez-Alcala, "Modeling of facet heating in high-power laser diodes", Proc. SPIE 3889, Advanced High-Power Lasers, (3 April 2000); doi: 10.1117/12.380947; https://doi.org/10.1117/12.380947

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