Analysis of a PMD insensitive polarization multiplexed coherent optical OFDM system for 100 Gb/s optical transmission

A novel polarization multiplexed coherent optical OFDM system is proposed and experimentally demonstrated for 100 Gb/s transmission. In this technique, two signals can be transmitted at the same wavelength with orthogonal state of polarization through OFDM transmitter and at the receiver end those signals are received by coherent detector. The implemented model can be treated as a special kind of multiple-input multiple output (MIMO) model which is intrinsically represented by a two-element Jones vector. Though PMD represents a major source of performance degradation in polarization multiplexed systems due to its polarization sensitive detection, the special MIMO system successfully mitigates the effect without any extra compensation system. Performance of the system is evaluated through simulation and different criteria are analyzed with the simulation result.