Time-dependent simulation of thermal lensing in high-power broad-area semiconductor lasers

Medientyp: Sonstige Veröffentlichung; E-Book; Bericht

Titel: Time-dependent simulation of thermal lensing in high-power broad-area semiconductor lasers

Beteiligte: Zeghuzi, Anissa [VerfasserIn]; Wünsche, Hans-Jürgen [VerfasserIn]; Wenzel, Hans [VerfasserIn]; Radziunas, Mindaugas [VerfasserIn]; Fuhrmann, Jürgen [VerfasserIn]; Klehr, Andreas [VerfasserIn]; Bandelow, Uwe [VerfasserIn]; Knigge, Andrea [VerfasserIn]

Erschienen: Weierstrass Institute for Applied Analysis and Stochastics publication server, 2019

Sprache: Englisch

DOI: https://doi.org/10.20347/WIAS.PREPRINT.2634

Schlagwörter: 35Q79 ; article ; Broad-area laser -- heat flow -- pulsed laser operation -- traveling-wave model -- thermal lensing -- temperature fluctuation ; 70K70 ; 78A60 ; 78-04 ; 35Q60 ; 81Q37

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Beschreibung: We propose a physically realistic and yet numerically applicable thermal model to account for short and long term self-heating within broad-area lasers. Although the temperature increase is small under pulsed operation, a waveguide that is formed within a few-ns-long pulse can result in a transition from a gain-guided to an index-guided structure, leading to near and far field narrowing. Under continuous wave operation the longitudinally varying temperature profile is obtained self-consistently. The resulting unfavorable narrowing of the near field can be successfully counteracted by etching trenches.

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