System of optical telephony
US4330869A · kind A · utility
9Cited by
11References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1980 |
| Grant date | May 18, 1982 |
| Priority date | — |
| Expiry date | Dec 16, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/0001
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.