Patent ID: 6844212

Claim:
A method of manufacturing a grating dispersion compensator, comprising the steps of: a) providing a substrate having a substrate index of refraction; b) forming a grating layer base on the substrate having a grating base index of refraction greater than the substrate index of refraction on a portion of the top surface of the substrate; c) defining and etching a grating pattern in the grating layer base; d) forming a grating top layer having a grating top index of refraction less than the grating base index of refraction over the etched grating layer base such that the grating top layer and the grating layer base form a dielectric grating layer having an index of refraction that changes to define at least one grating period; e) forming a waveguide layer having a waveguide index of refraction greater than the substrate index of refraction and greater than the grating top index of refraction over the dielectric grating layer; f) defining and etching a waveguide having a longitudinal axis in the waveguide layer; g) forming a passivation layer having a passivation index of refraction substantially equal to the substrate index of refraction over the waveguide; and h) forming a waveguide to form grating dispersion compensator input/output (I/O) surface on the waveguide.