Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1985-11-27
1988-09-06
Sikes, William L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
350 9611, 350 9612, 350 9614, 350358, 455608, 455609, 455610, 455612, 372 44, G02B 610, G02F 100, H01S 319
Patent
active
047688521
ABSTRACT:
Method and apparatus for frequency domain modulation optical fiber communication particularly useful for digital and analog signal transmission comprising, in the order recited, a plurality of parallel-connected signal input units each incorporating individual laser sources provided with means modulating the output radiations of said laser sources responsive to individual signal inputs, thereby establishing, for each signal input, an individual optical information wave train, a collimating lens, an acousto-optical modulator means introducing a sub-carrier signal developing a beat frequency with said optical information wave train, an optical fiber coupler transmitting the resulting signal through an optical fiber to a common square law detector and an information receiver isolating a preselected individual signal input according to its associated individual sub-carrier frequency, said individual sub-carrier frequencies being spaced one from another by a frequency interval forestalling interference in the reception of said individual signal inputs.
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Healy Brian M.
Sikes William L.
University of Delaware
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