Patent ID: 7068881

Claim:
A CDMA communications system, comprising: a transmitter including a source of optical pulses having a pulse width of no more than 10 ps, a first optical demultiplexer receiving said optical pulses and dividing them into first wavelength components thereof on a plurality of first waveguides, a plurality of separately controlled first phase modulators disposed on respective ones of said first waveguides to phase modulate said first wavelength components according to a first code, and a first optical multiplexer connected to said first waveguides and combining said wavelength components into a second waveguide configured for input to an optical transmission system; and a receiver including a second optical demultiplexer configured to receive optical signals from said optical transmission system and dividing them into second wavelength components thereof on a plurality of second waveguides, a plurality of separately controlled second phase modulators disposed on respective ones of said second waveguides to phase modulate said second wavelength components according to a second code, and a second optical multiplexer connected to said second waveguides and combining said second wavelength components, and an optical detector receiving said combined second wavelength components.