Optical receiver with optical transmitter-specific dispersion post-compensation

A method for use in an optical communication device, comprising:

• receiving a first optical signal from a first remote optical transmitter;
• receiving a second optical signal from a second remote optical transmitter;
• converting the first optical signal into a plurality of analog electrical signals comprising two orthogonal polarization components, an X-polarization component and a Y-polarization component, wherein the X-polarization component comprises a first in-phase (I) component and a first quadrature-phase (Q) component, and wherein the Y-polarization component comprises a second I component and a second Q component;
• determining a first direct current (DC) offset for the first I component;
• determining a second DC offset for the first Q component;
• removing the first DC offset from the first I component to produce one of a plurality of first digital electrical signals;
• removing the second DC offset from the first Q component to produce another of the first digital electrical signals;
• converting the second optical signal into a plurality of second digital electrical signals;
• compensating the first digital electrical signals according to a first dispersion value associated with the first remote optical transmitter to produce a plurality of first compensated digital electrical signals;
• compensating the second digital electrical signals according to a second dispersion value associated with the second remote optical transmitter to produce a plurality of second compensated digital electrical signals;
• adding the first DC offset to one of the first compensated digital electrical signals associated with the first I component;
• and
• adding the second DC offset to another of the first compensated digital electrical signals associated with the first Q component.

A method comprising:

• converting an optical intensity-modulated (IM) signal associated with a remote optical transmitter into a plurality of analog electrical signals;
• determining a plurality of direct current (DC) offsets for the analog electrical signals;
• removing the DC offsets from the analog electrical signals to produce a plurality of DC-free analog signals;
• converting the DC-free analog signals into a plurality of DC-free digital signals;
• performing fiber dispersion compensation on the DC-free digital signals according to a dispersion value associated with the remote optical transmitter to produce a plurality of DC-free compensated digital signals;
• and
• adding the DC offsets to the DC-free compensated digital signals to produce a plurality of DC-restored compensated digital signals.