Patent ID: 7262913
Filing Date: 2007-08-28
Classification: G02B,H04B

Abstract:
1. A chromatic dispersion and dispersion slope compensating apparatus comprising: an optical system which receives a wavelength division multiplexed light containing a plurality of optical signals having different wavelengths, and condenses said wavelength division multiplexed light in a one-dimensional direction to output it; an optical component including two reflective surfaces which are opposed and parallel to each other, in which the wavelength division multiplexed light output from said optical system is incident between said reflective surfaces, and a part of the incident light is transmitted through one of said reflective surfaces while the incident light being multiple-reflected on said respective reflective surfaces, and then, the transmitted light interferes mutually, so that, for each of the optical signals of respective wavelengths contained in said wavelength division multiplexed light, the light dispersed to a first direction at different angles according to wavelengths is output; a diffraction grating which disperses the optical signals of respective wavelengths output from said optical component to a second direction vertical to said first direction at different angles according to wavelengths; a reflecting section that comprises a plurality of three-dimensional mirrors each having a reflective surface of curved shape whose curvature in said first direction is changed along said second direction, in which change rates of the curvatures in said first direction to said second direction are different from each other; and a movable stage in which the plurality of three-dimensional mirrors of said reflecting section are moved to said second direction corresponding to respective compensation amounts of the chromatic dispersion and the dispersion slope, and the optical signals of respective wavelengths output from said diffraction grating are reflected by any one of the plurality of three-dimensional mirrors of said reflecting section, and then, the reflected light is returned to said optical component via said diffraction grating.