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Thermal modelling of laser diode packages
Author(s): Martin Wölz; Christopher Spiess; Jan Vetterlein; Jens Meusel
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Paper Abstract

We introduce a toolbox for modelling laser diode operation over a large temperature range, as is encountered in long-pulse hair removal, and in mobile applications such as LiDAR. Power-to-current characteristics and lifetime estimations are sought for arbitrary pulse patterns in quasi-continuous-wave (QCW) operation. Our model is based on (1) the Zth-representation of the package thermal transient, (2) a temperature-dependent family of diode characteristics replacing the insufficient T0,T1-approach, and (3) the assumption that the device lifetime depends on the maximum junction temperature. The simulated evolution of output power and temperature is experimentally verified. Using our model, we assess the influence of the package geometry on the diode temperature and on the efficiency of diode-pumped solid state lasers. We also re-assess lifetime data, and derive safe operating parameters for an arbitrary pulse length.

Paper Details

Date Published: 4 March 2019
PDF: 11 pages
Proc. SPIE 10899, Components and Packaging for Laser Systems V, 1089905 (4 March 2019); doi: 10.1117/12.2509579
Show Author Affiliations
Martin Wölz, JENOPTIK Laser GmbH (Germany)
Christopher Spiess, JENOPTIK Laser GmbH (Germany)
Univ. of Rochester (United States)
Jan Vetterlein, JENOPTIK Laser GmbH (Germany)
Jena-Optronik GmbH (Germany)
Jens Meusel, JENOPTIK Laser GmbH (Germany)

Published in SPIE Proceedings Vol. 10899:
Components and Packaging for Laser Systems V
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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