Carrier-induced differential refractive index in GaInAsP-GaInAs separate confinement multiquantum well lasers

Measurements of subthreshold spectra on SCMQW (separate-confinement multiquantum-well) lasers with the number of wells varying from three to nine have led to the determination of the carrier-induced differential refractive index d mu /dN approximately -3.6*10/sup -20/. This value is 1.8 greater than in the case of conventional bulk lasers. This study allows for a better understanding of quantum well laser parameters such as the spectral linewidth enhancement factor. It is also useful for the design of tunable lasers.<
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