Patent ID: 8755690

Claim:
An optical network system, comprising optical transmitters having output ports; dispersion compensation modules having input ports and output ports; optical receivers; optical lines interconnecting said optical transmitters, said dispersion compensation modules, and said optical receivers; wherein said output port of at least one of said optical transmitters is connected to said input port of a respective said dispersion compensation module, and said output port of said dispersion compensation module is connected to a respective said optical receiver, building an optical path in the optical network; wherein said dispersion compensation module includes: a circulator; a Fiber Bragg Grating disposed to reflect a portion of an input signal back into the optical path for compensating a chromatic dispersion of the optical path; and a photo detector disposed behind said Fiber Bragg Grating for receiving a portion of the input signal that is not reflected back into the optical path, said photo detector outputting a photo detector signal indicating information about the input signal into said dispersion compensation module; and at least one network element managing unit connected to receive from said dispersion compensation modules the photo detector signal.