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Gain measurements on one, two, and three strained GaInP quantum well laser diodes

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3 Author(s)
Hunziker, G. ; IBM Res. Div., Zurich, Switzerland ; Knop, W. ; Harder, Christoph

We report on systematic investigations of the modal gain below threshold for one, two, and three compressively strained 680 nm AlGaInP quantum well lasers using the Hakki-Paoli method. Accurate values of the gain are obtained by carefully spacial filtering the light for the fundamental waveguide mode. Gain flattening and peak gain shifts are observed even at moderate pumping levels. It is shown that the gain scales very well with the number of quantum wells. We also observe that gain flattening starts at current densities per quantum well of 700 A/cm 2

Published in:

Quantum Electronics, IEEE Journal of  (Volume:30 ,  Issue: 10 )

Date of Publication:

Oct 1994

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