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Realization and Characterization of Optically-Pumped GaInN-DFB Lasers

Published online by Cambridge University Press:  10 February 2011

R. Hofmann ,
V. Wagner ,
H-P. Gauggel ,
F. Adler ,
P. Ernst ,
A. Sohmer ,
H. Bolay ,
F. Scholz  and
H. Schweizer
R. Hofmann
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
V. Wagner
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
H-P. Gauggel
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
F. Adler
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
P. Ernst
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
A. Sohmer
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
H. Bolay
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
F. Scholz
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
H. Schweizer
Affiliation:
4. Physik. Institut, Universitat Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
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Abstract

We demonstrate room temperature laser activity of optically pumped GaN/GalnN-DFB-lasers. The ridge-waveguide DFB lasers were realized on GaN/GalnN double heterostructures grown by low-pressure metal-organic vapor phase epitaxy. The best laser threshold we achieved is 1.9 MW/cm2.

By varying the grating period, the laser emission wavelength could be tuned from 399 to 415 nm. This allows to determine the dispersion relation of the effective refractive index neff(λ) and the spectral dependence of the pump power density at the laser threshold Pth(λ) over the whole emission range. Furthermore, the shift of the emission wavelength with temperature of the DFB-lasers is investigated and is found to be small compared to the emission wavelength shift of the gain maximum.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 449: Symposium N – III-V Nitrides , 1996 , 1197
Copyright
Copyright © Materials Research Society 1997

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References

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