Patent ID: 6985656
Filing Date: 2006-01-10
Classification: G02B,G02F,G03H

Abstract:
1. An optical apparatus, comprising a planar optical waveguide having at least one set of diffractive elements, the planar optical waveguide substantially confining in at least one transverse spatial dimension an optical signal propagating therein, wherein: each diffractive element set routes, between a corresponding input optical port and a corresponding output optical port, a corresponding diffracted portion of the optical signal propagating in the planar waveguide that is diffracted by the diffractive element set; the optical signal is successively incident on the diffractive elements of the set; and the planar waveguide comprises at least one material having thermo-optic properties chosen so as to yield a designed temperature dependence of at least one of spectral characteristics and temporal characteristics of the diffracted portion of the optical signal.