Hybrid compensation of chromatic dispersion in optical networks

A controller comprising:

• a memory;
• and
• one or more processors operably coupled to the memory, wherein the one or more processors are configured to:
• receive a chromatic dispersion value indicating an amount of chromatic dispersion of an optical signal received at a coherent receiver integrated with a receiver optical network device;
• compare the chromatic dispersion value with a threshold, wherein the threshold defines an edge chromatic dispersion value at which the coherent receiver changes, according to a step function, a number of data points in a function used to compensate the chromatic dispersion;
• and
• in response to determining that the chromatic dispersion value satisfies the threshold, perform at least one of:
• configure a switch to switch the optical signal to a dispersion compensation module (DCM) to cause the DCM to compensate the chromatic dispersion value of the optical signal, or
• adjust a phase response of a filter of a coherent transmitter to compensate the chromatic dispersion of the optical signal.

An interconnection system comprising:

• a coherent receiver integrated with a receiver optical network device;
• a coherent transmitter;
• and
• a controller,
• wherein the coherent receiver is configured to:
• receive an optical signal;
• determine a chromatic dispersion value indicating an amount of chromatic dispersion of the optical signal;
• send, to the controller, the chromatic dispersion value of the optical signal;
• wherein the controller is configured to:
• receive the chromatic dispersion value of the optical signal from the coherent receiver;
• compare the chromatic dispersion value with a threshold, wherein the threshold defines an edge chromatic dispersion value at which the coherent receiver changes, according to a step function, a number of data points in a function used to compensate the chromatic dispersion;
• and
• in response to determining that the chromatic dispersion value satisfies the threshold, perform at least one of:
• configure a switch to switch the optical signal to a dispersion compensation module (DCM) to cause the DCM to compensate the chromatic dispersion of the optical signal, or
• adjust a phase response of a filter of the coherent transmitter to compensate the chromatic dispersion of the optical signal.