Patent ID: 6724796
Filing Date: 2004-04-20
Classification: H01L,H01S

Abstract:
An optical device comprising:(a) a first reflector comprising: (i) a plurality of mirror pairs each comprising a pair of layers, each layer of each mirror pair having an index of refraction different than that of the other layer of the respective mirror pair; and (ii) a tuning layer disposed therein, the tuning layer having an index of refraction different from that of the layers of the mirror pairs of the first reflector, wherein: the tuning layer is a single tuning layer disposed between two mirror pairs of the first reflector; the difference in refractive index for each mirror pair of the first reflector defines a refractive index contrast for the respective mirror pair; and the mirror pairs of the plurality of mirror pairs on one side of the tuning layer have a first refractive index contrast and the other mirror pairs of the plurality of mirror pairs have a second refractive index contrast different than the first refractive index contrast, wherein the mirror pairs on said one side of the tuning layer comprise pairs of Al2O3 and Si, the other mirror pairs comprise pairs of InGaAs and InAlAs and the tuning layer consists of SiO2; (b) a second reflector; and (c) an optical cavity defined by the first and second reflectors.