IDENTIFYING DATA STREAMS IN POLARIZATION MULTIPLEXED TRANSMISSION

摘要

A polarization multiplexed receiver includes a polarization separator and optical mixing, detecting and analog-to-digital components. The polarization separator receives polarization multiplexed optical signals containing a first data stream and a second data stream, and operate upon the polarization multiplexed optical signals to separate, in an optical domain, the first data stream and the second data stream to generate a first optical output having the first data stream and a second optical output having the second data stream. The optical mixing, detecting and analog-to-digital converting components receive the first and second optical outputs from the polarization separator, extract, in a digital domain, the first data stream from the first optical output of the polarization separator, and extract, in the digital domain, the second data stream from the second optical output of the polarization separator.

主权项

1. A polarization multiplexed transmitter, comprising:
a laser; a first modulation unit configured to modulate a first output of the laser based on first input data signals to produce first output optical signals; a signal generator configured to generate a subcarrier modulation signal; a second modulation unit, coupled to the signal generator, and configured to modulate a second output of the laser based on second input data signals and the subcarrier modulation signal to produce second output optical signals; a polarization rotator coupled to the first modulation unit and configured to rotate a polarization axis of the first output optical signals a certain angle relative to a polarization axis of the second output optical signals to produce third output optical signals; and a polarization multiplexer configured to combine the second output optical signals and the third output optical signals into polarization multiplexed output signals.