Patent ID: 7058258
Filing Date: 2006-06-06
Classification: G02B,H04B

Abstract:
1. A tunable dispersion compensator comprising: a plurality of ring resonators connected in series having the same delay time spectrum; and a central wavelength controlling unit which controls the respective central wavelengths at which said plurality of ring resonators are resonating, wherein each of said plurality of ring resonators includes a linear waveguide, a ring-shaped waveguide disposed along said linear waveguide, and an optical coupler which optically couples said linear waveguide and said ring-shaped waveguide, thereby constituting a plurality of ring-shaped waveguides and a plurality of optical couplers, wherein said respective central wavelengths are controlled to respective predetermined values by said central wavelength controlling unit and the respective delay time spectra of said resonators are combined, and the inclination of the slope of the combined delay time spectrum is thereby controlled and the amount of dispersion compensation is changed according to the degree of the inclination of said slope, and wherein respective intervals between said central wavelengths increase as the wavelengths become longer.