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Proceedings Paper

Next generation 9xx/10xx nm high power laser diode bars for multi-kilowatt industrial applications
Author(s): Paul Commin; René Todt; Martin Krejci; Rainer Bättig; Reinhard Brunner; Norbert Lichtenstein
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Paper Abstract

We report on the development of high power, 9xx-10xx nm laser diode bars for use in direct diode systems and for solidstate and fibre laser pumping with applications in industrial markets. For 1 cm wide bars on micro channel cooler (MCC) we have achieved a reliable output power of 250 W across the 900 nm – 1060 nm range. At this output power level we have achieved power conversion efficiencies of 65-66 % and 90 % power content slow axis beam divergence of ~6.5°. Results of a 6400 h life test show an average power degradation of 0.6 % per 1000 h at this operating power level. We will also show results of high power bars assembled on the new OCLARO conductive cooler, the BLM. This new cooler has a small footprint of 12.6 mm × 24.8 mm and is designed for lateral or vertical stacking of diodes in multi kilowatt systems but with the benefits associated with a conductive cooler. The thermal properties are shown to be the same as for a standard CS mount. 1 cm wide high fill factor bars and 0.5 cm wide low fill factor half bars assembled on the BLM operate at 63-64 % power conversion efficiency (PCE) with output powers of up to 250 W and 150 W, respectively.

Paper Details

Date Published: 26 February 2013
PDF: 11 pages
Proc. SPIE 8605, High-Power Diode Laser Technology and Applications XI, 86050Y (26 February 2013); doi: 10.1117/12.2004296
Show Author Affiliations
Paul Commin, Oclaro GmbH (Switzerland)
René Todt, Oclaro GmbH (Switzerland)
Martin Krejci, Oclaro GmbH (Switzerland)
Rainer Bättig, Oclaro GmbH (Switzerland)
Reinhard Brunner, Oclaro GmbH (Switzerland)
Norbert Lichtenstein, Oclaro GmbH (Switzerland)


Published in SPIE Proceedings Vol. 8605:
High-Power Diode Laser Technology and Applications XI
Mark S. Zediker, Editor(s)

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