Patent ID: 6879755
Filing Date: 2005-04-12
Classification: G02B,H04B

Abstract:
1. A tunable dispersion compensator for the compensation of chromatic dispersion in a light signal having a plurality of wavelength channels, each wavelength channel having accumulated a different chromatic dispersion so that said light signal has a dispersion slope, said dispersion compensator comprising: a first and a second tunable optical structure, each comprising: an optical waveguide having a light propagation axis; and a Bragg grating provided in said waveguide across the light propagation axis, said Bragg grating having a plurality of grating components, each said grating component being associated with a limited number of said plurality of wavelength channels and having a characteristic spatially variable Bragg wavelength selected to compensate for a given chromatic dispersion; first and second tuning means for independently tuning the spatially variable Bragg wavelengths of said grating components of a respective one of said first and second optical structures; and