发明名称 |
INTRUSION DETECTION SYSTEM FOR USE ON SINGLE MODE OPTICAL FIBER USING A STORAGE REGISTER FOR DATA |
摘要 |
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.
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申请公布号 |
US2006291795(A1) |
申请公布日期 |
2006.12.28 |
申请号 |
US20050152772 |
申请日期 |
2005.06.15 |
申请人 |
MURPHY CARY R;VOKEY DAVID E;BRIDGES MARK K |
发明人 |
MURPHY CARY R.;VOKEY DAVID E.;BRIDGES MARK K. |
分类号 |
G02B6/00 |
主分类号 |
G02B6/00 |
代理机构 |
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