High-Efficiency Broad-Ridge Waveguide Lasers

Highly efficient single-spatial mode lasers with wattlevel output power in the 9xx-nm wavelength range are of great interest for a variety of applications. We experimentally investigate the influence of the mesa widths on the electrooptical properties of ridge-waveguide lasers, based on an extreme d...

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Bibliographic Details
Published in:IEEE photonics technology letters 2018-03, Vol.30 (6), p.545-548
Main Authors: Wilkens, Martin, Wenzel, Hans, Fricke, Jorg, Maabdorf, Andre, Ressel, Peter, Strohmaier, Stephan, Knigge, Andrea, Erbert, Gotz, Trankle, Gunther
Format: Article
Language:English
Subjects:
Diode lasers
Efficiency
Energy conversion efficiency
gallium arsenide
high power
Laser modes
Lasers
Optical properties
Optical pumping
Optical waveguides
Photonics
Power generation
Power lasers
quantum well lasers
ridge-waveguide lasers
single-spatial mode operation
Waveguide lasers
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Summary:Highly efficient single-spatial mode lasers with wattlevel output power in the 9xx-nm wavelength range are of great interest for a variety of applications. We experimentally investigate the influence of the mesa widths on the electrooptical properties of ridge-waveguide lasers, based on an extreme double asymmetric epitaxial structure. These properties are, for example, the conversion efficiency and the maximum power of single-lateral mode operation (kink power). At an output power of almost 1 W, single-lateral mode operation with the highest efficiency of 60% was achieved with a 10-μm ridge-width laser. The highest peak efficiency of 62% and the highest output power of 2.7 W with still 59% efficiency were yielded by a laser with a ridge width of 15 μm, at the expense of a slightly deteriorated beam quality due to the involvement of a higher order lateral mode. The kink power of the 10-μm-ridge laser can be further increased by decreasing the front facet reflectivity from 2.5% to 0.5%.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2018.2801621