Intensity modulated direct detection (imdd) optical transceiver system

An Intensity Modulated Direct Detection (IMDD) transceiver device, comprising:

• an optical transmitter including:
• an Electro-Optical Modulator (EOM) that includes an optical directional coupler and that is configured to modulate light to generate a first optical signal and a second optical signal that include the same data and that include respective intensities that are 180 degrees out of phase;
• a polarization rotator that is coupled to the EOM and that is configured to receive the second optical signal and rotate a polarization of the second optical signal to provide an orthogonally polarized second optical signal that is orthogonally polarized relative to the first optical signal;
• and
• a polarization beam splitter that is coupled to the EOM and the polarization rotator and that is configured to receive the first optical signal and the orthogonally polarized second optical signal, combine the first optical signal and the orthogonally polarized second optical signal while maintaining a polarization orthogonality of the first optical signal and the orthogonally polarized second optical signal to provide a first combined optical signal, and transmit the first combined optical signal via an optical cable.

A method for transmitting data in an Intensity Modulated Direct Detection (IMDD) optical transceiver system, comprising:

• modulating, by an optical transmitter in an Intensity Modulated Direct Detection (IMDD) transceiver device, light to generate a first optical signal and a second optical signal that include the same data and that include respective intensities that are 180 degrees out of phase;
• rotating, by the optical transmitter in the IMDD transceiver device, a polarization of the second optical signal to provide an orthogonally polarized second optical signal that is orthogonally polarized to the first optical signal;
• combining, by the optical transmitter in the IMDD transceiver device, the first optical signal and the orthogonally polarized second optical signal while maintaining a polarization orthogonality of the first optical signal and the orthogonally polarized second optical signal to provide a first combined optical signal;
• and
• transmitting, by the optical transmitter in the IMDD transceiver device, the first combined optical signal via an optical cable.