Optical RF downconverter

Details Optical RF downconverter Optical RF downconverter

1982-09-30

1984-08-28

Orsino, Jr., Joseph A.

Multiplex communications

Wide area network

Packet switching

455619, H04B 900

Patent

active

044687664

ABSTRACT:
An optical downconverter with very wide bandwidth operable to separately ically downconvert individual spectrum sections of an RF spectrum, comprising the steps of modulating an optical carrier with the RF spectral width to be downconverted, spatially separating via optical gratings the different sections of the spectrum of the optical carrier sidebands into a plurality of optical channels, generating a different phase-coherent optical local oscillator signal for each optical channel at an appropriate frequency such that the difference between the LO frequency and the particular spectrum section on the given optical channel is equal to a predetermined difference frequency; and mixing each optical channel with its appropriate frequency L.O. and detecting the difference frequency resulting therefrom.

REFERENCES:
patent: 3231742 (1966-01-01), Siggman
patent: 3328583 (1967-06-01), Davison
patent: 3415995 (1968-12-01), Kerr
patent: 3845294 (1974-10-01), Indig et al.
patent: 4244045 (1981-01-01), Nosu et al.
patent: 4274706 (1981-06-01), Tangonan

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