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Impact of external optical feedback on high-power diode laser lifetime and failure modes
Author(s): Heiko Kissel; Jens W. Tomm; Bernd Köhler; Jens Biesenbach
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Paper Abstract

We present results of investigations on high-power diode lasers in the spectral range between 780 nm and 1060 nm with different antireflection coatings at the outcoupling facet. Comparative life tests on high-power laser bars and single emitters with and without external optical feedback delivered significantly different results. Depending on the emission wavelength, we found different degradation rates and failure modes such as accelerated gradual degradation and catastrophic optical mirror damage caused by different energy reabsorption scenarios with respect to the energy gap of the device substrate material. We will also show different impacts of general and wavelength selective feedback on the near-field distribution.

Paper Details

Date Published: 4 March 2019
PDF: 12 pages
Proc. SPIE 10900, High-Power Diode Laser Technology XVII, 109000S (4 March 2019); doi: 10.1117/12.2509845
Show Author Affiliations
Heiko Kissel, DILAS Diodenlaser GmbH (Germany)
Jens W. Tomm, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Bernd Köhler, DILAS Diodenlaser GmbH (Germany)
Jens Biesenbach, DILAS Diodenlaser GmbH (Germany)

Published in SPIE Proceedings Vol. 10900:
High-Power Diode Laser Technology XVII
Mark S. Zediker, Editor(s)

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