Secure fiber optics communication system
US4174149A · kind A · utility
13Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1976 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Aug 19, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4469
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A secure communications system is disclosed which utilizes an optical infation signal transmitted over a frangible optical fiber. An alarm signal is continuously transmitted from the information receiver site to the information transmitter site over the same optical fiber. Any attempt to penetrate the optical fiber for the purpose of intercepting the information transmitted therein causes the frangible fiber to shatter, thereby disrupting the alarm signal being received at the information transmitter site. The detection of this condition results in the immediate disabling of the information transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.