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Realization and Characterization of Optically-Pumped GaInN-DFB Lasers

Published online by Cambridge University Press:  10 February 2011

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 n eff(λ) and the spectral dependence of the pump power density at the laser threshold P th(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
Copyright
Copyright © Materials Research Society 1997

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Realization and Characterization of Optically-Pumped GaInN-DFB Lasers
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