Local area warning of optical fiber intrusion

Details Local area warning of optical fiber intrusion Local area warning of optical fiber intrusion

2007-09-27

2010-11-30

Wang, Quan-Zhen (Department: 2613)

Optical communications

Diagnostic testing

C398S010000, C398S016000, C385S012000, C385S013000

Reexamination Certificate

active

07844178

ABSTRACT:
Disclosed is a method and apparatus which provides for alerting of potential fiber optic cable intrusion. A stress detector located at a fiber optic cable termination point detects stress on the fiber optic cable and generates an alarm signal in response to the stress detection. The alarm signal is transmitted to remote alarm units along the fiber optic right of way via a conductive metallic portion of the fiber optic cable (e.g., the fiber optic cable sheath). In response to receipt of an alarm signal, the alarm units initiate a perceptible (e.g., audible and/or visible) alarm. The stress detector may also determine a location of the stress, and generate an alarm signal addressed to a particular one or more alarm units in the vicinity of the stress location.

REFERENCES:
patent: 4630035 (1986-12-01), Stahl et al.
patent: 6148123 (2000-11-01), Eslambolchi et al.
patent: 6332738 (2001-12-01), Eslambolchi et al.
patent: 2003/0094298 (2003-05-01), Morrow et al.

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