WAVELENGTH DISPERSION GENERATOR AND ITS PRODUCTION AND WAVELENGTH DISPERSION COMPENSATOR

摘要

PURPOSE:To provide the wavelength dispersion compensator having high performance and excellent compactness (smaller size). CONSTITUTION:Wavelength dispersed signal light is inputted from a terminal 310 of a directional coupler 300 and is outputted from a terminal 320. This signal light is inputted to a wavelength dispersion generator. The wavelength dispersion generator which has an optical fiber 100 formed with a diffraction grating continuously varied in inter-grating spacing and a supporting member 200, has a polarity reverse from the polarity of the wavelength dispersion of the signal light inputted from the terminal 310 and is adjusted in the absolute value of the wavelength dispersion to approximately the same value is used. Then, the wavelength dispersion generated in the wavelength dispersion generator compensates the wavelength dispersion of the signal light inputted from the terminal 310. The signal light subjected to compensation of the wavelength dispersion is outputted from a light incident end face 110 of the wavelength dispersion generator and is inputted from a terminal 320 to the directional coupler. The signal light inputted from the terminal 320 is outputted from a terminal 330. The signal light compensated in the wavelength dispersion is thus obtd.