Patent ID: 6501874
Filing Date: 2002-12-31
Classification: G02B

Abstract:
A dispersion compensator for compensating for dispersion in a transmission medium, comprising:an input port for receiving a WDM optical signal having a plurality of signal wavelengths; a first Bragg transmission grating having non-zero dispersion at at least one of the signal wavelengths and having a Bragg wavelength so that all of the plurality of signal wavelengths lie outside of a reflection band of the first Bragg transmission grating, said first Bragg transmission grating receiving the WDM optical signal from the input port; a second Bragg transmission grating optically coupled to the first Bragg transmission grating, a second Bragg transmission grating having non-zero dispersion at at least one of the signal wavelengths and having a Bragg wavelength so that all of the plurality of signal wavelengths lie outside of a reflection band of the second Bragg transmission grating; and an output port for receiving the optical signal from the second Bragg grating and communicating the optical signal to an external source.