Optical communications system with wavelength division multiplexing

A method of transmitting RF information on a span of optical fiber, comprising:

• generating first and second light beams of differing wavelengths;
• wavelength division multiplexing both the first and second light beams;
• modulating both the first and second light beams with the same RF information;
• and
• coupling the modulated and wavelength division multiplexed first and second light beams to the span of optical fiber, wherein after multiplexing, the light beams are modulated by the RF information.

An optical communications system comprising:

• a transmitter system outputting two wavelength division multiplexed optical signals, each carrying the same RF information;
• a span of optical fiber coupled to the transmitter system;
• a receiver coupled to the span of optical fiber,
• wherein the transmitter system comprises:
• a first light source outputting a first light beam having a first wavelength.
• a second light source outputting a second light beam having a second wavelength differing from the first wavelength;
• and
• a wavelength division multiplexer, both the first and second light beams being coupled to input ports of the wavelength division multiplexer, and the wavelength division multiplexer having an output port, wherein the output port is coupled to the optical fiber span;
• and
• a modulator coupled between the output port of the wavelength division multiplexer and the fiber optical span, wherein an RF signal carrying the RF information is coupled to an electrical port of the modulator.