JP2005512047A - 光ファイバの欠陥を検出するセンサおよび方法 - Google Patents
光ファイバの欠陥を検出するセンサおよび方法 Download PDFInfo
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
- G01M11/333—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face using modulated input signals
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- 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
- G01D5/35306—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 an interferometer arrangement
- G01D5/35325—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 an interferometer arrangement using interferometer with two arms in reflection, e.g. Mickelson interferometer
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- 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
- G01D5/35338—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 other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
- G01M11/331—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face by using interferometer
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- Instruments For Measurement Of Length By Optical Means (AREA)
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Abstract
Description
Claims (23)
- 光路に沿って光を送るように構成された光源と、
前記光源に光結合され、前記光の少なくとも一部分を変調信号に応じて変調するように構成された少なくとも1つの変調器と、
前記少なくとも1つの変調器に光結合され、前記光路の末端における前記光の感知強度に基づいて検出器出力を生成するように構成された検出器と、
前記検出器出力を受信し、光路長を示す出力を提供するように構成された電子システムと、
を含む光路の長さを決定するセンサ。 - 前記変調信号が前記検出器出力に応じて決まり前記光に対する所望の影響を生じ、それにより、前記光路の前記長さが、前記電子システムによって前記所望の影響を生じる前記変調信号に応じて決定される、請求項1に記載のセンサ。
- 前記光源と前記少なくとも1つの変調器の間に光結合された光スプリッタをさらに含み、それにより前記光スプリッタを通過する光が第1の経路と第2の経路とに分割される、請求項1に記載のセンサ。
- 前記検出器出力は、前記第1の経路および前記第2の経路に沿って進む光の位相差を示す、請求項3に記載のセンサ。
- 前記変調信号は、前記光路の長さに応じて決まる周波数で生成される、請求項1に記載のセンサ。
- 前記電子システムは、前記検出器出力の変化に応答して前記変調信号の周波数を調整し、前記変調信号を前記光路に関係する周波数に維持する、請求項5に記載のセンサ。
- 光路に沿って光を生成するステップと、
前記光を第1のビームおよび第2のビームに分割するステップと、
前記第1のビームおよび前記第2のビームのうち少なくとも一方を変調信号に応じて変調して、前記第1のビームと前記第2のビームの間に差を生じさせるステップと、
前記第1のビームおよび前記第2のビームを再結合して再結合信号を生成するステップと、
検出器において、前記再結合信号の出力強度を検出するステップと、
前記出力強度に応じて前記変調信号を調整するステップと、
前記変調信号の関数として前記光路の前記長さを計算するステップと、
を含む光路の長さを決定する方法。 - 前記変調信号を調整する前記ステップは、前記出力強度がほぼ一定に維持されるように前記変調信号をある周波数に維持するステップを含む、請求項7に記載の方法。
- 前記第1のビームと前記第2のビームの間の前記差は位相差である、請求項7に記載の方法。
- 前記変調信号は、ある周波数を有するランプ波形である、請求項7に記載の方法。
- 前記変調信号を前記第1のビームに印加した後、前記光路の前記長さに基づく遅延分だけ経過した後、前記変調信号を前記第2のビームに印加するステップをさらに含む、請求項7に記載の方法。
- 前記変調信号を調整する前記ステップは、前記出力強度をサンプリングして経時的な前記出力強度の差を決定するステップを含む、請求項11に記載の方法。
- 前記変調信号を調整する前記ステップは、前記変調信号の周波数を変化させて前記出力強度の前記経時的な差を減少させるステップをさらに含む、請求項12に記載の方法。
- 前記調整ステップは、前記出力強度の差が経時的に最小となるように前記変調信号の適切な周波数を決定するステップを含む、請求項13に記載の方法。
- 前記長さを計算する前記ステップは、前記適切な周波数から前記光路の前記長さを決定するステップを含む、請求項14に記載の方法。
- 光ファイバによって規定される光路に沿って光を送るように構成された低コヒーレンスな白色光源と、
該光源に光結合された、第1の経路の光の少なくとも一部分を第2の経路に対して相対的に変調させる位相変調器と、
該光路に光結合された、該光路の長さに基づいて検出器出力を生成する検出器と、
検出器出力を受信し、該光路の長さに基づいて出力を生成するプロセッサとを含み、該光源が、該第1の経路と該第2の経路の間の経路長差より短いコヒーレンス長を有する、
試験中の光ファイバの長さを決定するシステム。 - 白色光源と変調器の間にカプラをさらに含む、請求項16に記載のシステム。
- 前記カプラが2×2カプラである、請求項17に記載のシステム。
- 前記ファイバに光結合された遅延ファイバをさらに含む、請求項16に記載のシステム。
- 光ファイバ部分の末端において光トランスデューサを検査するコネクタをさらに含む、請求項16に記載のシステム。
- 対象物または空気中からの光を伝達および集光する望遠光学部品をさらに含む、請求項16に記載のシステム。
- 前記プロセッサは、前記光が進む光路の長さが決定されるように検出器出力を受信する、請求項16に記載のシステム。
- 該プロセッサは、試験中のファイバの破損欠陥が決定されるように検出器出力を受信する、請求項16に記載のシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/004,651 US6798523B2 (en) | 2001-12-04 | 2001-12-04 | Sensor and method for detecting fiber optic faults |
PCT/US2002/037471 WO2003048746A1 (en) | 2001-12-04 | 2002-11-21 | Sensor and method for detecting fiber optic faults |
Publications (2)
Publication Number | Publication Date |
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JP2005512047A true JP2005512047A (ja) | 2005-04-28 |
JP2005512047A5 JP2005512047A5 (ja) | 2006-01-05 |
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JP2003549892A Pending JP2005512047A (ja) | 2001-12-04 | 2002-11-21 | 光ファイバの欠陥を検出するセンサおよび方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US6798523B2 (ja) |
EP (1) | EP1451556A1 (ja) |
JP (1) | JP2005512047A (ja) |
WO (1) | WO2003048746A1 (ja) |
Cited By (1)
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JP2013535675A (ja) * | 2010-07-29 | 2013-09-12 | ワイカトリンク リミテッド | 対象物の距離特性および/または輝度特性を測定する装置および方法 |
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GB0322859D0 (en) * | 2003-09-30 | 2003-10-29 | British Telecomm | Communication |
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 |
FR2867620B1 (fr) * | 2004-03-12 | 2008-10-24 | Thales Sa | Dispositif de decalage de frequence dans un chemin optique a source laser continue |
FR2867619B1 (fr) * | 2004-03-12 | 2006-06-23 | Thales Sa | Dispositif de decalage de frequence dans un chemin optique a source laser pulsee |
GB0407386D0 (en) * | 2004-03-31 | 2004-05-05 | British Telecomm | Monitoring a communications link |
US7245800B1 (en) | 2004-09-08 | 2007-07-17 | Lockheed Martin Corporation | Fiber optic interconnect with visible laser indicator and fault detector |
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CN109357689B (zh) * | 2018-11-21 | 2022-06-07 | 中国船舶重工集团公司第七0七研究所 | 一种三轴光纤陀螺仪标度因数正交建模补偿方法 |
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2001
- 2001-12-04 US US10/004,651 patent/US6798523B2/en not_active Expired - Lifetime
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2002
- 2002-11-21 JP JP2003549892A patent/JP2005512047A/ja active Pending
- 2002-11-21 WO PCT/US2002/037471 patent/WO2003048746A1/en active Application Filing
- 2002-11-21 EP EP02789820A patent/EP1451556A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013535675A (ja) * | 2010-07-29 | 2013-09-12 | ワイカトリンク リミテッド | 対象物の距離特性および/または輝度特性を測定する装置および方法 |
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WO2003048746A1 (en) | 2003-06-12 |
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