System of optical telephony

Details System of optical telephony System of optical telephony

1980-12-16

1982-05-18

Britton, Howard

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

370 3, 455612, H04B 900

Patent

active

043308694

ABSTRACT:
This system includes optical fibers (21,26,49,51) which connect subscriber sets (p,n) to an optical interconnection center (59). An optical frequency F.sub.p and a modulation frequency f.sub.p are ascribed to each subscriber p, these frequencies being specific to the subscriber. The set of each subscriber p includes a laser (19) which delivers a wave (22) of frequency F.sub.p and means (9, 12 to 18) to modulate the amplitude of this wave at the frequency f.sub.n ascribed to the subscriber n with whom he wishes to communicate.

REFERENCES:
patent: 2602886 (1952-07-01), Fields
patent: 3455625 (1969-07-01), Brumley
patent: 3716790 (1973-02-01), Romoser
patent: 3932023 (1976-01-01), Humer
patent: 3953727 (1976-04-01), D'Auria
patent: 3986020 (1976-10-01), Kogelnik
patent: 4027153 (1977-05-01), Kach
patent: 4227260 (1980-10-01), Vojvodich
patent: 4234970 (1980-11-01), Beasley
patent: 4244045 (1981-01-01), Nosu
patent: 4256927 (1981-03-01), Treheux
Applied Optics, vol. 13, No. 11, Nov. 1974.

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