A new compact continuous-wave green laser with line beam

Michio Oka; Kaoru Kimura; Yuki Maeda; Koji Takahashi; Nobutake Iwase; Hitoshi Tamada

doi:10.1117/12.762254

13 February 2008 A new compact continuous-wave green laser with line beam

Michio Oka, Kaoru Kimura, Yuki Maeda, Koji Takahashi, Nobutake Iwase, Hitoshi Tamada

Proceedings Volume 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII; 68750L (2008) https://doi.org/10.1117/12.762254
Event: Lasers and Applications in Science and Engineering, 2008, San Jose, California, United States

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.

Citation Download Citation

Michio Oka, Kaoru Kimura, Yuki Maeda, Koji Takahashi, Nobutake Iwase, and Hitoshi Tamada "A new compact continuous-wave green laser with line beam", Proc. SPIE 6875, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VII, 68750L (13 February 2008); https://doi.org/10.1117/12.762254

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