Near-infrared refractive index of thick, laterally oxidized AlGaAs cladding layers

The optical transmission in the range 900-1600 nm was measured through thick (/spl sim/1 /spl mu/m) layers of Al/sub 0.98/Ga/sub 0.02/As wet-oxidized at 375/spl deg/C on GaAs. The spectra are fit well by neglecting absorption, and using 1.61 for the refractive index.