Optical transmitter of modulated signals

Details Optical transmitter of modulated signals Optical transmitter of modulated signals

1987-06-30

1990-01-09

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

370 2, 455612, 455616, 455617, 455619, H04B 900

Patent

active

048933520

ABSTRACT:
Orthogonal optical signals on a common waveguide are obtained by power splitting a light signal into a split waveguide, modulating at least one of the split signals and recombining the signals. The orthogonal signals may be obtained by separating the signals in frequency or by quadrature encoding. Frequency translation may be obtained by continuously varying an applied voltage to vary the dielectric constant of a leg of the split waveguide. One of the signals may also be frequency, phase or amplitude modulated. This split waveguide may serve as the frequency shifter and modulator in a three-frequency heterodyne system.

REFERENCES:
patent: 3752992 (1973-08-01), Fluhr
patent: 4447116 (1984-05-01), King et al.
patent: 4681395 (1987-07-01), Lindsay et al.
patent: 4684207 (1987-08-01), Lawless
patent: 4755016 (1988-07-01), DeLoach, Jr. et al.

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