Wave-division multiplexing telecommunications system and method

摘要

A fiber optic data transmission system includes an optical fiber and a data transmitter having a first laser having a first wavelength, a first phase modulator for phase modulating light from the first laser as a function of a first data input stream so as to create a first phase-modulated output data stream, a second laser having a second wavelength different from the first wavelength, and a second phase modulator for phase modulating light from the second laser as a function of a second data input stream so as to create a second phase-modulated output data stream. The transmitter also includes a combiner combining the first and second output data streams into a phase-modulated optical signal for transmission over the optical fiber.

主权项

1. A method for transmitting data over optical fiber comprising the steps of:
transmitting light at a first wavelength via a first laser; phase modulating light at the first wavelength at a data transmitter as a function of a first electronic data input stream so as to create a first output data stream, a first binary bit being represented by a first phase and a second binary bit being represented by a second phase different from the first phase; transmitting light at a second wavelength different from the first wavelength; phase modulating light at the second wavelength at the data transmitter as a function of a second electronic data input stream so as to create a second output data stream; combining the first and second output data streams; and lowering a power output of the first laser via a controller as a function of a bit error rate; wherein the phase modulating of the first wavelength is a function of outputs of delayed-feedback exclusive-or gates.