Imaging Catastrophic Optical Mirror Damage in High-Power Diode Lasers
- 110 Downloads
We image catastrophic optical mirror damage (COMD) in red- and infrared-emitting high-power broad-area diode lasers by combining highly COMD-selective thermography, near-field imaging, scanning electron microscopy, and cathodoluminescence. All techniques exhibit strong correlations in terms of COMD location and strength and allow for an unambiguous decision about COMD occurrence. In particular, temperatures en route to and during COMD are measured, and the concept of a critical facet temperature that induces thermal runaway is supported.
KeywordsHigh-power diode lasers catastrophic optical mirror damage laser degradation thermography
Unable to display preview. Download preview PDF.
We acknowledge M. Bou Sanayeh (Notre Dame University, Louaize, Lebanon), P. Brick (OSRAM Opto Semiconductors GmbH, Regensburg, Germany), C. Matthiesen, (Cambridge University, Cambridge, UK), D. Reeber and H. Lawrenz (Ferdinand-Braun-Institut, Berlin, Germany), H.E. Larsen, P.M. Petersen, and P.E. Andersen (Technical University of Denmark, Roskilde, Denmark) for expert technical assistance, helpful discussion, and for providing us with laser samples and equipment, and Funding by the European Commission within the project WWW.BRIGHTER.EU under Contract No. IST-2005-035266 is acknowledged.
- 13.M. Ziegler, Thermography of Semiconductor Lasers (Ph.D. Thesis, Humboldt-Universität zu Berlin, Germany, 2009) urn:nbn:de:kobv:11-10099932.