Electronic dispersion correction circuit for optical transmission system

An optical transmission system comprising:

• a driver operable to provide an input signal;
• a dispersion correction circuit operable to generate an electrical output signal, the dispersion correction circuit including an input portion, an output portion and a filter portion;
• and
• a laser operable to output an optical signal based on the electrical output signal,
• wherein the input portion is arranged to receive the input signal,
• wherein the output portion is operable to output an output signal based on the input signal, and
• wherein the filter portion is disposed between the input portion and the output portion,
• wherein the filter portion includes a first varactor, a DC bias portion and a second varactor,
• wherein the DC bias portion provides a DC bias to the first varactor,
• wherein the first varactor is arranged in a polarity direction, and
• wherein the second varactor is arranged in the polarity direction, an anode of the first varactor being connected to a cathode of the second varactor.

A method of compensating for dispersion associated with an input driving signal, the method comprising:

• receiving, via an input portion, the input driving signal;
• filtering, via a filter portion, the input driving signal;
• outputting, via an output portion, an output signal based on the filtered input driving signal;
• and
• wherein the filter portion includes a first varactor, a DC bias portion and a second varactor,
• wherein the DC bias portion provides a DC bias to the first varactor,
• wherein the first varactor is arranged in a polarity direction, and
• wherein the second varactor is arranged in the polarity direction, an anode of the first varactor being connected to a cathode of the second varactor.