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Proceedings Paper

A new compact continuous-wave green laser with line beam
Author(s): Michio Oka; Kaoru Kimura; Yuki Maeda; Koji Takahashi; Nobutake Iwase; Hitoshi Tamada
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Paper Abstract

We report a compact high-power continuous-wave green laser for a scanning laser projector using one-dimensional diffractive spatial modulators (GxL modulators). The green laser oscillates in one-dimensional multi-transversal modes and generates a beam in a line from a periodically-poled stoichiometric lithium tantalate (PPSLT) crystal inside the laser cavity. The line beam enables diffraction-limited focusing in one direction and can be easily transformed into a top-hat beam because of the low spatial coherency in the multi-transversal-mode direction. The maximum output green power is 7.2W when pumped at a LD current of 24 A. The input electrical-power efficiency to the green output is as high as 16% at 6W green power output. We used the laser to build compact, air-cooled laser modules with a cavity footprint as small as 50 mm2. The laser showed no degradation over 8,500 hours at 3W output.

Paper Details

Date Published: 13 February 2008
PDF: 7 pages
Proc. SPIE 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII, 68750L (13 February 2008); doi: 10.1117/12.762254
Show Author Affiliations
Michio Oka, Sony Corp. (Japan)
Kaoru Kimura, Sony Corp. (Japan)
Yuki Maeda, Sony Corp. (Japan)
Koji Takahashi, Sony Corp. (Japan)
Nobutake Iwase, Sony Corp. (Japan)
Hitoshi Tamada, Sony Corp. (Japan)

Published in SPIE Proceedings Vol. 6875:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII
Peter E. Powers, Editor(s)

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