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Gain and index measurements in GaAlAs quantum well lasers

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2 Author(s)
M. P. Kesler ; IBM Zurich Res. Lab., Switzerland ; C. Harder

Measurements of the modal gain and group index in GaAlAs single-quantum-well (SQW) lasers are presented. The elimination of substrate emission has allowed accurate results to be obtained even in the near-bandgap and below-bandgap spectral regions. Substantial lifetime broadening is observed, and the gain smoothly goes to zero as the bandgap is approached. The group velocity index measurements indicate a dispersion of -3.44 mu m/sup -1/.<>

Published in:

IEEE Photonics Technology Letters  (Volume:2 ,  Issue: 7 )