Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Reexamination Certificate
2007-04-17
2007-04-17
Leung, Quyen (Department: 2874)
Optical waveguides
Optical waveguide sensor
Including physical deformation or movement of waveguide
C340S557000, C340S541000
Reexamination Certificate
active
11152681
ABSTRACT:
A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.
REFERENCES:
patent: 3683352 (1972-08-01), West et al.
patent: 4777476 (1988-10-01), Dank
patent: 4840481 (1989-06-01), Spillman, Jr.
patent: 4904863 (1990-02-01), McDearmon
patent: 5026141 (1991-06-01), Griffiths
patent: 5384635 (1995-01-01), Cohen et al.
patent: 5432498 (1995-07-01), Zilbershtein et al.
patent: 6724469 (2004-04-01), Leblanc
patent: 2005/0002017 (2005-01-01), Haran
patent: 2005/0276611 (2005-12-01), Patel et al.
patent: WO 02/095349 (2002-11-01), None
Bridges Mark K.
Murphy Cary R.
Vokey David E.
Battison Adrian D.
Dupuis Ryan W.
Leung Quyen
Network Integrity Systems Inc.
Williams Michael R.
LandOfFree
Intrusion detection system for use on single mode optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Intrusion detection system for use on single mode optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intrusion detection system for use on single mode optical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3768393