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Proceedings Paper

Visible lasers for mobile projection
Author(s): U. Steegmüller; M. Kühnelt; H. Unold; T. Schwarz; R. Schulz; K. Auen; C. Walter; M. Schmitt
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Paper Abstract

Visible laser sources are attracting considerable interest to enable ultra-small, embedded laser scanning projection devices. We report recent progress on the development of red, green and blue semiconductor based laser sources. Red and blue colours are achieved by edge-emitting laserdiodes, whereas green uses frequency doubled optically pumped semiconductor lasers. Green lasers turned-out to be on the critical path for the technical and commercial success of laser displays. Because all current approaches are based on frequency doubling, the green source is the major contributor of cost, size and power consumption. Important parameters like size, efficiency, output power, beam quality, and modulation bandwidth are discussed.

Paper Details

Date Published: 25 April 2008
PDF: 8 pages
Proc. SPIE 7001, Photonics in Multimedia II, 70010D (25 April 2008); doi: 10.1117/12.781082
Show Author Affiliations
U. Steegmüller, OSRAM Opto Semiconductors GmbH (Germany)
M. Kühnelt, OSRAM Opto Semiconductors GmbH (Germany)
H. Unold, OSRAM Opto Semiconductors GmbH (Germany)
T. Schwarz, OSRAM Opto Semiconductors GmbH (Germany)
R. Schulz, OSRAM Opto Semiconductors GmbH (Germany)
K. Auen, OSRAM Opto Semiconductors GmbH (Germany)
C. Walter, OSRAM Opto Semiconductors GmbH (Germany)
M. Schmitt, OSRAM Opto Semiconductors GmbH (Germany)


Published in SPIE Proceedings Vol. 7001:
Photonics in Multimedia II
Ari Tervonen; Frank Möllmer, Editor(s)

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