Patent ID: 7319821
Filing Date: 2008-01-15
Classification: G02B,H04B

Abstract:
1. A chromatic dispersion generating apparatus comprising: an optical component provided with a demultiplexing function, including a device having two reflective surfaces which are opposed and parallel to each other, in which a light condensed in the one-dimensional direction is incident between the reflective surfaces of said device, and a part of said incident light is transmitted through one of the reflective surfaces while said incident light being multiple-reflected on the reflective surfaces, to be emitted, and said emitted light interferes mutually, so that optical beams traveling directions of which are different from each other according to wavelengths are formed; and a reflector reflecting, at a previously set position, optical beams of respective wavelengths emitted from one of the reflective surfaces of said optical component in different directions to return the optical beams to said optical component, respectively, said chromatic dispersion generating apparatus further comprising: a storing section that includes a first area which stores, for a specific wavelength among a plurality of wavelengths on a predetermined wavelength grid, data relating to positions of said reflector corresponding to at least two chromatic dispersion values together with said specific wavelength and a chromatic dispersion slope value, and a second area which stores, for the respective wavelengths on said wavelength grid, data relating to the temperatures of said optical component corresponding to at least two chromatic dispersion values together with the respective wavelengths on said wavelength grid and a wavelength temperature coefficient; a computing section designated with a wavelength and a chromatic dispersion value at an operation time, that computes a target position of said reflector corresponding to said designated wavelength and said designated chromatic dispersion value, based on information stored in the first area of said storing section, and also computes the target temperature of said optical component corresponding to said designated wavelength and said designated chromatic dispersion value, based on information stored in the second area of said storing section; a position control section that coincides the position of said reflector with the target position computed in said computing section; and a temperature control section that coincides the temperature of said optical component with the target temperature computed in said computing section.