Multi-core optical communications fiber

Details Multi-core optical communications fiber Multi-core optical communications fiber

1975-07-11

1976-12-28

Caldwell, John W.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 96R, 350 96WG, 340380, H04B 900

Patent

active

040004163

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.

REFERENCES:
patent: 3445785 (1969-05-01), Koester et al.
patent: 3535017 (1970-10-01), Miller
patent: 3583786 (1971-06-01), Marcatili
patent: 3636473 (1972-01-01), Young
patent: 3700900 (1972-10-01), Herleikson
patent: 3865466 (1975-02-01), Slaughter

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