Patent ID: 6714705
Filing Date: 2004-03-30
Classification: G02B

Abstract:
A dispersion and dispersion slope compensator, comprising:a Virtually Imaged Phased Array (VIPA) optically coupled to an optical fiber transmission system at a first side of the VIPA, wherein a composite optical signal from the optical fiber transmission system is capable of traversing through the VIPA in a forward direction, wherein the composite optical signal comprises a plurality of channels, each of the plurality of channels comprising a band of wavelengths, wherein the bands of wavelengths comprise dispersion and dispersion slope; a rotatable transmissive diffraction grating, wherein a first side of the rotatable transmissive diffraction grating is optically coupled to a second side of the VIPA; a focusing lens, wherein a first side of the focusing lens is optically coupled to a second side of the rotatable transmissive diffraction grating; and a mirror optically coupled to a second side of the focusing lens, wherein the mirror is translationally adjustable, wherein the mirror comprises a different curvature at different cross-sections, wherein the mirror reflects the bands of wavelengths from different cross-sections toward a return direction, wherein the bands of wavelengths propagate through the focusing lens, the rotatable transmissive diffraction grating, and the VIPA in the return direction, wherein compensatory dispersion and compensatory dispersion slope are added to the reflected bands of wavelengths such that the dispersion and dispersion slope are compensated.