JP5600850B2 - 誘導ブリルアン散乱による自己参照型光ファイバセンサ - Google Patents
誘導ブリルアン散乱による自己参照型光ファイバセンサ Download PDFInfo
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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
- G01D5/268—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 using optical fibres
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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
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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
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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
- G01D5/35367—Sensor working in reflection using reflected light other than backscattered to detect the measured quantity
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Description
・ 干渉型の方法(P.Nashの「Review of interferometric optical fiber hydrophone technology」(IEE Proc.Radar Sonar Navig.Vol.143,No.3(1996)を参照)。具体的には、
○ ファイバジャイロ(このテーマに関しては、V.Vali、R.W.Shorthillらの「Fiber ring interferometer」(Appl.Opt.Vol.15,No.5,1099(1976))を参照)。
・ 後方散乱技術(ラマン散乱、ブリルアン散乱、またはレイリー散乱など)。具体的には、L.Thevenazらの「Monitoring of large structures using distributed Brillouin fiber sensing」(Proceedings of the 13th International Conference on optical fiber sensors (OFS−13),Korea,SPIE Vol.3746,345(1999))を参照されたい。
・ 上記ファイバに、第1の、「ポンプ」波を第1の光周波数で注入し、第2の、「プローブ」波を第2の光周波数で注入するように設計された光学的手段であって、第2の光周波数は、第1の光周波数と異なり、ブラッググレーティングは、第1および第2の光波を反射するように設計されており、第1の波の光パワーは、誘導ブリルアン散乱によって反射された第2の波との相互作用の後に、「ストークス」波を与えるのに十分であり、ストークス波の周波数は、被測定物理量を表す、光学的手段と、
・ 2つの光波、すなわち、「ポンプ」波および「ストークス」波の間の周波数差を分析する手段と、を備える。
・ 測定11用光ファイバ10。光ファイバ10の光学特性は、物理量εの影響を受けやすい。光ファイバ10は、少なくとも1つのブラッググレーティング12を有する。
・ ファイバに、第1の、「ポンプ」波1を、νP(ε)で示される第1の光周波数で注入し、第2の、「プローブ」波2を、νプローブ(ε)で示される第2の光周波数で注入するように設計された光学的手段20。第2の光周波数は、第1の光周波数と異なる。ブラッググレーティングは、第1および第2の光波を反射するように設計されている。第1の波の光パワーは、誘導ブリルアン散乱によって反射された第2の波との相互作用の後に、「ストークス」波2′を与えるのに十分であり、νS(ε)で示されるストークス波2′の周波数は、被測定物理量を表す。
・ センサは、入射波1および2、ならびに反射波1′および2′を分割する手段30と、(図1に示していない)光検出器で受信された2つの光波の間の周波数差を分析する手段40と、を含んでいる。
程度の圧力ノイズスペクトル密度に相当するものでなければならない。光ファイバに加わる圧力
ただし、Eはヤング率であり、
□ εzおよびεrは、長手方向および半径方向の歪みであり(等方性の場合はεz=εr)、
□ neは、ファイバの有効屈折率であり、
□ Λ=λB/2neは、グレーティングの周期であり、
□ p11およびp12は、長手方向および横断方向の弾性光学係数であり、シリカの場合は、ne=1.456、p11=0.121、およびp12=0.265である。
Claims (6)
- 少なくとも1つのブラッググレーティング(12)を有する、1つ以上の測定用光ファイバ(10)を備える、物理量測定用光ファイバセンサであって、
前記ファイバに、第1の、「ポンプ」波を第1の光周波数で注入し、第2の、「プローブ」波を第2の光周波数で注入するように設計された光学的手段(20)であって、
第2の光周波数は、前記第1の光周波数と異なり、前記ブラッググレーティングは、
第1および第2の光波を反射するように設計されており、前記第1の波の光パワーは、誘導ブリルアン散乱によって反射された前記第2の光波との相互作用の後に、「ストークス」波を与えるのに十分であり、前記ストークス波の周波数は、被測定物理量を表す、前記光学的手段(20)と、
前記2つの光波、すなわち、「ポンプ」波および「ストークス」波の間の周波数差を分析する手段(40)と、
をさらに含むことを特徴とする、光ファイバセンサ。 - 前記第1の光波と前記第2の光波との間の周波数差は、10GHzであることを特徴とする、請求項1に記載の光ファイバセンサ。
- 前記光ファイバは、カルコゲナイドベースのガラスから作られたファイバ、またはビスマスドープシリカから作られた光ファイバであることを特徴とする、請求項1に記載の光ファイバセンサ。
- 前記センサは歪みセンサであり、前記被測定物理量は、前記ファイバに加わる機械的歪みであることを特徴とする、請求項1〜3のいずれか一項に記載の光ファイバセンサ。
- 前記センサはハイドロホンであることを特徴とする、請求項4に記載の光ファイバセンサ。
- 請求項1〜5のいずれか一項に記載の光ファイバセンサのアレイであって、前記センサのすべてが同一光ファイバ上に連続して配置されることと、前記ファイバと前記分析手段との間に配置された波長多重化器を含むことと、を特徴とする、光ファイバセンサのアレイ。
Applications Claiming Priority (3)
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FR0804253 | 2008-07-25 | ||
FR0804253A FR2934365B1 (fr) | 2008-07-25 | 2008-07-25 | Capteur a fibre optique auto-reference a diffusion brillouin stimulee |
PCT/EP2009/057948 WO2010009951A1 (fr) | 2008-07-25 | 2009-06-25 | Capteur a fibre optique auto-reference a diffusion brillouin stimulee |
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JP2011529175A JP2011529175A (ja) | 2011-12-01 |
JP5600850B2 true JP5600850B2 (ja) | 2014-10-08 |
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JP2011519099A Expired - Fee Related JP5600850B2 (ja) | 2008-07-25 | 2009-06-25 | 誘導ブリルアン散乱による自己参照型光ファイバセンサ |
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US (1) | US20110122417A1 (ja) |
EP (1) | EP2307856B1 (ja) |
JP (1) | JP5600850B2 (ja) |
KR (1) | KR20110052586A (ja) |
AU (1) | AU2009273441A1 (ja) |
FR (1) | FR2934365B1 (ja) |
WO (1) | WO2010009951A1 (ja) |
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- 2009-06-25 AU AU2009273441A patent/AU2009273441A1/en not_active Abandoned
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Publication number | Publication date |
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US20110122417A1 (en) | 2011-05-26 |
AU2009273441A1 (en) | 2010-01-28 |
FR2934365A1 (fr) | 2010-01-29 |
EP2307856A1 (fr) | 2011-04-13 |
EP2307856B1 (fr) | 2014-08-20 |
KR20110052586A (ko) | 2011-05-18 |
FR2934365B1 (fr) | 2010-08-13 |
WO2010009951A1 (fr) | 2010-01-28 |
JP2011529175A (ja) | 2011-12-01 |
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