Patent ID: 6157477
Filing Date: 2000-12-05
Classification: G02B,H04B

Abstract:
A system for providing chromatic dispersion compensation to a first optical signal carried in a first optical band in a first direction from a first optical transmission medium to a second optical transmission medium and a second optical signal carried in a second optical band in a direction opposite said first direction from said second optical transmission medium to said first optical transmission medium, which comprises:an optical circulator including a first port, a second port, a third port, and a fourth port, said first port being coupled to said first optical transmission medium and said second port being coupled to said second optical transmission medium;a first dispersion compensating grating coupled to said second port, said first dispersion compensating grating being operative to reflect wavelengths in said first optical band, and said first dispersion compensating grating being substantially transparent to wavelengths in said second optical band;a second dispersion compensating grating coupled to said fourth port, said second dispersion compensating grating being operative to reflect wavelengths in said second optical band, and said second dispersion compensating grating being substantially transparent to wavelengths in said first optical band; and,means for coupling said first dispersion compensating grating to said second dispersion compensating grating.