Optical properties of InGaAsP lattice matched to GaAs

Summary form only given.Significant advances have been made in recent years in the fabrication of high power diode lasers utilizing the aluminum free InGaAsP-GaAs material system, which has some advantages over the more commonly used AlGaAs system. Although numerous and detailed studies have been performed on the growth, fabrication and characterization of InGaAsP based lasers, very little has been reported on fundamental material properties, such as the index of refraction. From the perspective of designing optoelectronic devices such as diode lasers, a detailed knowledge of the optical constants of the materials at the relevant wavelengths is required. In this paper, the optical constants of InGaAsP, ranging in composition from GaAs to InGaP, are presented.