JP2004525388A5 - - Google Patents

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Publication number
JP2004525388A5
JP2004525388A5 JP2002591777A JP2002591777A JP2004525388A5 JP 2004525388 A5 JP2004525388 A5 JP 2004525388A5 JP 2002591777 A JP2002591777 A JP 2002591777A JP 2002591777 A JP2002591777 A JP 2002591777A JP 2004525388 A5 JP2004525388 A5 JP 2004525388A5
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JP
Japan
Prior art keywords
light
optical waveguide
polarization
optical fiber
retardance
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JP2002591777A
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English (en)
Japanese (ja)
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JP4350380B2 (ja
JP2004525388A (ja
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Priority claimed from GBGB0112161.5A external-priority patent/GB0112161D0/en
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Publication of JP2004525388A5 publication Critical patent/JP2004525388A5/ja
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Publication of JP4350380B2 publication Critical patent/JP4350380B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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JP2002591777A 2001-05-18 2002-05-09 光ファイバの後方散乱偏光分析 Expired - Lifetime JP4350380B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0112161.5A GB0112161D0 (en) 2001-05-18 2001-05-18 Distributed fibre polarimetry for communications and sensing
PCT/GB2002/002138 WO2002095349A1 (en) 2001-05-18 2002-05-09 Optical fibre backscatter polarimetry

Publications (3)

Publication Number Publication Date
JP2004525388A JP2004525388A (ja) 2004-08-19
JP2004525388A5 true JP2004525388A5 (cg-RX-API-DMAC7.html) 2005-08-18
JP4350380B2 JP4350380B2 (ja) 2009-10-21

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JP2002591777A Expired - Lifetime JP4350380B2 (ja) 2001-05-18 2002-05-09 光ファイバの後方散乱偏光分析

Country Status (8)

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US (1) US7130496B2 (cg-RX-API-DMAC7.html)
EP (1) EP1390707B1 (cg-RX-API-DMAC7.html)
JP (1) JP4350380B2 (cg-RX-API-DMAC7.html)
AT (1) ATE348323T1 (cg-RX-API-DMAC7.html)
CA (1) CA2447660A1 (cg-RX-API-DMAC7.html)
DE (1) DE60216752T8 (cg-RX-API-DMAC7.html)
GB (1) GB0112161D0 (cg-RX-API-DMAC7.html)
WO (1) WO2002095349A1 (cg-RX-API-DMAC7.html)

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RU2339982C2 (ru) * 2003-10-22 2008-11-27 Фудзикура Лтд. Оптическое волокно и способ измерения поляризационной модовой дисперсии оптического волокна
US7697729B2 (en) 2004-01-29 2010-04-13 Authentec, Inc. System for and method of finger initiated actions
US7142737B1 (en) 2005-01-12 2006-11-28 Network Integrity Systems Inc. Intrusion detection system for use on single mode optical fiber using a storage register for data
US8094977B2 (en) 2005-01-12 2012-01-10 Network Integrity Systems Inc. Intrusion detection system for use on single mode optical fiber using a simplified polarimeter
US7831070B1 (en) 2005-02-18 2010-11-09 Authentec, Inc. Dynamic finger detection mechanism for a fingerprint sensor
US8231056B2 (en) 2005-04-08 2012-07-31 Authentec, Inc. System for and method of protecting an integrated circuit from over currents
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KR100832470B1 (ko) 2005-04-14 2008-05-26 가부시키가이샤후지쿠라 광섬유의 복굴절 측정 방법 및 측정 장치, 광섬유의 편파모드 분산 측정 방법 및 광섬유
US7164469B1 (en) 2005-06-30 2007-01-16 Corning Incorporated Method of evaluating fiber PMD using composite POTDR trace
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US7190442B1 (en) * 2005-08-31 2007-03-13 Corning Incorporated Method of evaluating fiber PMD using POTDR trace
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CN101682424B (zh) * 2007-04-05 2014-02-19 爱斯福公司 用于确定带内光噪声的方法和系统
JP4770913B2 (ja) * 2008-11-13 2011-09-14 横河電機株式会社 光ファイバ特性測定装置および光ファイバ特性測定方法
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US8866347B2 (en) 2010-01-15 2014-10-21 Idex Asa Biometric image sensing
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GB201019117D0 (en) 2010-11-11 2010-12-29 Fotech Solutions Ltd Distributed optical fibre sensor
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US10139433B2 (en) 2014-03-24 2018-11-27 Prysmian S.P.A. Method of measuring current distribution in high and medium voltage cables
BR112018070565A2 (pt) 2016-04-07 2019-02-12 Bp Exploration Operating Company Limited detecção de eventos de fundo de poço usando características de domínio da frequência acústicas
AU2017246520B2 (en) 2016-04-07 2022-04-07 Bp Exploration Operating Company Limited Detecting downhole events using acoustic frequency domain features
CN106289726B (zh) * 2016-07-14 2018-08-24 北京航空航天大学 一种光子带隙光纤背向散射分布式测量方法及装置
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