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Proceedings Paper

Power blue and green laser diodes and their applications
Author(s): Thomas Hager; Uwe Strauß; Christoph Eichler; Clemens Vierheilig; Sönke Tautz; Georg Brüderl; Bernhard Stojetz; Teresa Wurm; Adrian Avramescu; André Somers; Jelena Ristic; Sven Gerhard; Alfred Lell; Stefan Morgott; Oliver Mehl
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Paper Abstract

InGaN based green laser diodes with output powers up to 50mW are now well established for variety of applications ranging from leveling to special lighting effects and mobile projection of 12lm brightness. In future the highest market potential for visible single mode profile lasers might be laser projection of 20lm. Therefore direct green single-mode laser diodes with higher power are required. We found that self heating was the limiting factor for higher current operation. We present power-current characteristics of improved R and D samples with up to 200mW in cw-operation. An optical output power of 100mW is reached at 215mA, a current level which is suitable for long term operation. Blue InGaN laser diodes are also the ideal source for phosphor based generation of green light sources of high luminance. We present a light engine based on LARP (Laser Activated Remote Phosphor) which can be used in business projectors of several thousand lumens on screen. We discuss the advantages of a laser based systems in comparison with LED light engines. LARP requires highly efficient blue power laser diodes with output power above 1W. Future market penetration of LARP will require lower costs. Therefore we studied new designs for higher powers levels. R and D chips with power-current characteristics up to 4W in continuous wave operation on C-mount at 25°C are presented.

Paper Details

Date Published: 4 March 2013
PDF: 8 pages
Proc. SPIE 8640, Novel In-Plane Semiconductor Lasers XII, 86400G (4 March 2013); doi: 10.1117/12.2006220
Show Author Affiliations
Thomas Hager, OSRAM Opto Semiconductors GmbH (Germany)
Uwe Strauß, OSRAM Opto Semiconductors GmbH (Germany)
Christoph Eichler, OSRAM Opto Semiconductors GmbH (Germany)
Clemens Vierheilig, OSRAM Opto Semiconductors GmbH (Germany)
Sönke Tautz, OSRAM Opto Semiconductors GmbH (Germany)
Georg Brüderl, OSRAM Opto Semiconductors GmbH (Germany)
Bernhard Stojetz, OSRAM Opto Semiconductors GmbH (Germany)
Teresa Wurm, OSRAM Opto Semiconductors GmbH (Germany)
Adrian Avramescu, OSRAM Opto Semiconductors GmbH (Germany)
André Somers, OSRAM Opto Semiconductors GmbH (Germany)
Jelena Ristic, OSRAM Opto Semiconductors GmbH (Germany)
Sven Gerhard, OSRAM Opto Semiconductors GmbH (Germany)
Alfred Lell, OSRAM Opto Semiconductors GmbH (Germany)
Stefan Morgott, OSRAM Opto Semiconductors GmbH (Germany)
Oliver Mehl, OSRAM GmbH (Germany)

Published in SPIE Proceedings Vol. 8640:
Novel In-Plane Semiconductor Lasers XII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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