Multi-core optical communications fiber
US4000416A · kind A · utility
65Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Jul 11, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods and apparatus are disclosed for providing a multipath optical communications system within a single fiber. One embodiment comprises a concentric multi-core optical fiber having an inner core for transmitting information and an outer core for transmitting a security signal. Attempted access to the inner core causes a decrease in the security signal intensity alerting the operator to the attempted intrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.