| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable optical gain equalization apparatus in which the attenuation rate of the output light intensity is controlled as a passive resonator according to the variation in the reflectance of mirrors when one of opposite mirrors is dislocated in a direction perpendicular to an optical axis and the reflection face is dislocated from a light spot, while the operating wavelength : the phase characteristic of a filter is controlled by the resonator length, i.e., the dislocation of mirrors in the optical axis direction in a Fabri-Perot resonator. SOLUTION: In the variable optical gain equalization apparatus 10 which corrects and equalizes the signal light intensity with respect to the wavelength of wavelength multiplex signal light according to the deviation between wavelengths, a plurality of reflection type passive Fabri-Perot resonators 11, which is composed of a pair of opposing mirrors 1 and 3, and one mirror 1 is dislocated in both of the optical axis direction and the direction intersecting with an incident light spot and perpendicular to the optical axis, are connected in series via optical circulators 2. COPYRIGHT: (C)2005,JPO&NCIPI |
