H. Hillmer et al., EXPERIMENTAL AND THEORETICAL-STUDY OF THE FACET PHASE INFLUENCE ON THE WAVELENGTH SHIFT IN INGAAS INALGAAS QUANTUM-WELL DISTRIBUTED-FEEDBACK LASERS/, Applied physics letters, 64(6), 1994, pp. 698-700
Physical laser parameters such as differential gain and differential r
efractive index are determined for InGaAs/InAlGaAs quantum well struct
ures by comparing experimental results of different lasers with theore
tical data from transfer matrix model calculations. By using the deter
mined parameter set, the wavelength shift with current lambda(I) is fo
und to depend strongly in shape and magnitude on the end facet phases.
Within one order of magnitude we found weak and strong variations rel
ated to the variation of the axial nonuniformity of the carrier and ph
oton densities with current.