CORRELATION BETWEEN EXPERIMENTS TO MEASURE SCATTERING CENTERS IN 1.3-MU-M SEMICONDUCTOR DIODE-LASERS

Data obtained from two techniques on light scattering centers that are distributed along the length of the active region of 1.3 mum InGaAsP/ InP diode lasers are presented and discussed. Light scattering charact eristics were obtained for 16 lasers by analyzing light detected throu gh the substrate (using spatially and polarization resolved electrolum inescence) and by analyzing the facet emission for modulation features in the below-threshold reflectance-gain (R(m)G(m)) product. A Cartesi an plot of the data shows the points to be dispersed about a best-fit line, but correlated. The failure to fall within experimental uncertai nty on a line can be explained by a sampling phenomena due to the disc rete nature of the longitudinal modes and by the assumption of unequal or anisotropic scattering in the substrate and facet directions. The data is taken to show that the scattering is not isotropic.