JP4847467B2 - 光学システム - Google Patents
光学システム Download PDFInfo
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- JP4847467B2 JP4847467B2 JP2007546189A JP2007546189A JP4847467B2 JP 4847467 B2 JP4847467 B2 JP 4847467B2 JP 2007546189 A JP2007546189 A JP 2007546189A JP 2007546189 A JP2007546189 A JP 2007546189A JP 4847467 B2 JP4847467 B2 JP 4847467B2
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- 230000003287 optical effect Effects 0.000 title claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims 4
- 239000000835 fiber Substances 0.000 description 90
- 238000001228 spectrum Methods 0.000 description 28
- 230000010287 polarization Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000001427 coherent effect Effects 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35303—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using a reference fibre, e.g. interferometric devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D9/00—Recording measured values
- G01D9/02—Producing one or more recordings of the values of a single variable
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Optical Communication System (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Description
光源x(t)が静止したランダムプロセスであることも仮定した。
Claims (10)
- 第1の導波管部分と第2の導波管部分との一方における外乱を、第1の導波管部分と第2の導波管部分との他方における外乱を基準にして検知する光学検知システムであって、
第1の信号と第2の信号を生成する手段と、
各経路が第1の方向と前記第1の方向と反対の第2の方向との両者において前記第1の導波管部分と前記第2の導波管部分との各々を通過するように、前記第1の信号を第1の経路に沿って方向付け、及び前記第2の信号を第2の経路に沿って方向付ける方向付け手段と、
前記第1の経路と第2の経路に沿って移動してきた第1の信号と第2の信号を結合して、結合信号を提供する結合手段であって、前記結合信号から前記外乱を推測することができるように、前記第1の信号と前記第2の信号とが互いに関連付けられる、結合手段と、
を有する光学検知システム。 - 前記第1の信号と第2の信号はそれぞれ不規則成分を有し、前記第1の信号と第2の信号は、前記不規則成分が前記第1の信号及び第2の信号に共通となるように関連している、請求項1に記載の光学検知システム。
- 前記第1の信号と第2の信号はそれぞれ波形を有し、前記不規則成分は前記それぞれの波形の不規則な位相である、請求項2に記載の光学検知システム。
- 前記第1の信号と第2の信号は互いのコピーである、請求項1乃至請求項3のいずれか1項に記載の光学検知システム。
- 第1の送信信号と第2の送信信号の間に相対時間遅延を課すように構成された遅延段階を備え、前記第1の信号と前記第2の信号とは、関連付けられる位相コヒーレンス時間を有し、前記相対時間遅延が信号の位相コヒーレンス時間より大きい、請求項1乃至請求項4のいずれか1項に記載の光学検知システム。
- 前記第1の導波管部分または前記第2の導波管部分と一体化して形成されている追加の導波管部分により少なくとも部分的に遅延が課される、請求項5に記載の光学検知システム。
- 共通スリーブに沿って前記導波管が少なくとも部分的に延びている、請求項1乃至請求項6のいずれか1項に記載の光学検知システム。
- 前記方向付け手段は反射体構造を含み、前記第1の導波管と第2の導波管はそれぞれ前記反射体構造と前記カプラ装置との間に延びている、請求項請求項1乃至請求項7のいずれか1項に記載の光学検知システム。
- 第1の導波管が、第2の導波管を基準にして外乱を受けているかどうかを判断する方法であって、
それぞれの組が第1の信号と第2の信号を含む信号の組を生成するステップと、
各経路が第1の方向と前記第1の方向と反対の第2の方向との両者において前記第1の導波管部分と前記第2の導波管部分との各々を通過するように、第1の経路に沿って前記第1の信号を導き、第2の経路に沿って前記第2の信号を導くステップと、
前記第1の経路と第2の経路に沿って移動してきた各組の第1の信号と第2の信号とを結合して、結合信号を提供するステップであって、前記結合信号から前記外乱を推測することができるように、前記第1の信号と前記第2の信号とが互いに関連付けられる、ステップと、
を含む方法。 - 前記外乱は音響外乱である、請求項9に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0427733.1 | 2004-12-17 | ||
GBGB0427733.1A GB0427733D0 (en) | 2004-12-17 | 2004-12-17 | Optical system |
PCT/GB2005/004873 WO2006064258A1 (en) | 2004-12-17 | 2005-12-16 | Optical system |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2008524573A JP2008524573A (ja) | 2008-07-10 |
JP2008524573A5 JP2008524573A5 (ja) | 2009-01-29 |
JP4847467B2 true JP4847467B2 (ja) | 2011-12-28 |
Family
ID=34090272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007546189A Active JP4847467B2 (ja) | 2004-12-17 | 2005-12-16 | 光学システム |
Country Status (8)
Country | Link |
---|---|
US (1) | US7656535B2 (ja) |
EP (1) | EP1825227B1 (ja) |
JP (1) | JP4847467B2 (ja) |
KR (1) | KR20070094615A (ja) |
CN (1) | CN101080612A (ja) |
CA (1) | CA2589794A1 (ja) |
GB (1) | GB0427733D0 (ja) |
WO (1) | WO2006064258A1 (ja) |
Families Citing this family (22)
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US7667849B2 (en) * | 2003-09-30 | 2010-02-23 | British Telecommunications Public Limited Company | Optical sensor with interferometer for sensing external physical disturbance of optical communications link |
GB0322859D0 (en) * | 2003-09-30 | 2003-10-29 | British Telecomm | Communication |
GB0407386D0 (en) | 2004-03-31 | 2004-05-05 | British Telecomm | Monitoring a communications link |
GB0421747D0 (en) | 2004-09-30 | 2004-11-03 | British Telecomm | Distributed backscattering |
US7848645B2 (en) | 2004-09-30 | 2010-12-07 | British Telecommunications Public Limited Company | Identifying or locating waveguides |
CA2589792A1 (en) * | 2004-12-17 | 2006-06-22 | British Telecommunications Public Limited Company | Assessing a network |
GB0504579D0 (en) * | 2005-03-04 | 2005-04-13 | British Telecomm | Communications system |
DE602006007442D1 (de) * | 2005-03-04 | 2009-08-06 | British Telecomm Public Ltd Co | Akustooptische modulatoranordnung |
EP1708388A1 (en) | 2005-03-31 | 2006-10-04 | British Telecommunications Public Limited Company | Communicating information |
EP1713301A1 (en) | 2005-04-14 | 2006-10-18 | BRITISH TELECOMMUNICATIONS public limited company | Method and apparatus for communicating sound over an optical link |
EP1729096A1 (en) * | 2005-06-02 | 2006-12-06 | BRITISH TELECOMMUNICATIONS public limited company | Method and apparatus for determining the position of a disturbance in an optical fibre |
EP1826924A1 (en) * | 2006-02-24 | 2007-08-29 | BRITISH TELECOMMUNICATIONS public limited company | Sensing a disturbance |
DE602007013874D1 (de) * | 2006-02-24 | 2011-05-26 | British Telecomm | Erfassen einer störung |
US7961331B2 (en) * | 2006-02-24 | 2011-06-14 | British Telecommunications Public Limited Company | Sensing a disturbance along an optical path |
US8670662B2 (en) | 2006-04-03 | 2014-03-11 | British Telecommunications Public Limited Company | Evaluating the position of an optical fiber disturbance |
US9267330B2 (en) * | 2008-08-20 | 2016-02-23 | Foro Energy, Inc. | Long distance high power optical laser fiber break detection and continuity monitoring systems and methods |
CN101893452B (zh) * | 2009-05-20 | 2013-07-17 | 上海华魏光纤传感技术有限公司 | 一种相干涉光信号的共模分量系数消除装置 |
CN101625258B (zh) * | 2009-08-05 | 2012-03-21 | 上海华魏光纤传感技术有限公司 | 基于马赫-泽德干涉仪的光纤振动传感系统及传感方法 |
US9271058B2 (en) * | 2011-06-20 | 2016-02-23 | British Telecommunications Public Limited Company | Communications network |
EP3577799B1 (en) | 2017-02-01 | 2023-08-30 | British Telecommunications public limited company | Optical fibre event location |
GB2567610B (en) * | 2017-03-21 | 2021-07-21 | Nuron Ltd | Optical fibre pressure sensing apparatus employing longitudinal diaphragm |
EP3738228A1 (en) | 2018-01-09 | 2020-11-18 | British Telecommunications public limited company | Optical data transmission system |
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US7656535B2 (en) | 2010-02-02 |
EP1825227B1 (en) | 2015-07-15 |
GB0427733D0 (en) | 2005-01-19 |
WO2006064258A1 (en) | 2006-06-22 |
KR20070094615A (ko) | 2007-09-20 |
EP1825227A1 (en) | 2007-08-29 |
JP2008524573A (ja) | 2008-07-10 |
CA2589794A1 (en) | 2006-06-22 |
US20080018908A1 (en) | 2008-01-24 |
CN101080612A (zh) | 2007-11-28 |
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