JP2006524793A - 光インターロゲーションシステムおよびセンサシステム - Google Patents
光インターロゲーションシステムおよびセンサシステム Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 524
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01K11/3206—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 at discrete locations in the fibre, e.g. using Bragg scattering
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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
- G01D5/35383—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 multiple sensor devices using multiplexing techniques
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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Abstract
Description
該導波路に光結合し、モニタ中の反射光学素子から帰還する光パルスを選択的に透過し、さらに透過された光信号を光増幅するように動作可能な光増幅およびゲート手段(optical amplifying and gating means)と、
該光増幅およびゲート手段に光結合し、該光増幅およびゲート手段によって透過された帰還光パルスを検知するように動作可能な光学検知手段と
を含む光インターロゲーションシステムを提供する。
Claims (20)
- 光パルスを生成するように動作可能な光源であって、他端に一以上のモニタされる反射光学素子を光結合した光導波路の一端に結合される該光源と、
該導波路に光結合し、モニタ中の反射光学素子から帰還する光パルスを選択的に透過し、さらに透過された光信号を光増幅するように動作可能な光増幅およびゲート手段と、
該光増幅およびゲート手段に光結合し、該光増幅およびゲート手段によって透過された帰還光パルスを検知するように動作可能な光学検知手段と
を含む光インターロゲーションシステム。 - 光増幅およびゲート手段は、スイッチ型操作可能な光増幅デバイスであり、光増幅およびゲート手段をスイッチオンしたときに光信号を透過かつ増幅し、スイッチオフしたときに光信号の透過および増幅を回避する、請求項1に記載のインターロゲーションシステム。
- 該光増幅およびゲート手段は、双方向に動作可能であり、そして、利得クランプ半導体光増幅器であり得る半導体光増幅器を含む、請求項1または2に記載のインターロゲーションシステム。
- 該インターロゲーションシステムは、さらに光増幅およびゲート手段用の駆動装置を含み、該駆動装置は可変周波数の電気駆動パルスを生成し、かつ該光増幅およびゲート手段にスイッチオン・オフさせるように動作可能である、請求項1〜3のいずれか一項に記載のインターロゲーションシステム。
- 該光源は、該光増幅およびゲート手段がスイッチオンされると同時に増幅自然放出光信号を生成し、かつ該光信号を光パルス中へゲート制御する光増幅およびゲート手段を含む、請求項1〜4のいずれか一項に記載のインターロゲーションシステム。
- 該光源は、光増幅およびゲート手段に結合し、スーパールミネッセント光ダイオードのような連続波光信号を生成するように動作可能な連続波光源を含み、光増幅およびゲート手段がスイッチオン・オフする際に連続波光信号を光パルス中へゲート制御する、請求項1〜4のいずれか一項に記載のインターロゲーションシステム。
- 該光源は、光パルスを生成するように動作可能なパルス光源を含む、請求項1〜4のいずれか一項に記載のインターロゲーションシステム。
- 該光学検知手段は、光検出器を含む、請求項1〜7のいずれか一項に記載のインターロゲーションシステム。
- 該光学検知手段は、波長計のような波長評価装置、光スペクトルアナライザ、または波長依存性のフィルタ応答を有して光検出器のような光学検知手段を従える光フィルタ素子を含み、該光信号の飛行時間はそれがどのグレーティングから帰還したのかを同定し、そして該波長計、光スペクトルアナライザまたは光フィルタおよび光学検知手段が該光信号の波長を測定する、請求項1〜7のいずれか一項に記載のインターロゲーションシステム。
- 該インターロゲーションシステムは、さらに光増幅およびゲート手段と、一以上のモニタされる反射光学素子を含む光導波路との間に結合される光導波路セクションを含む、請求項1〜9のいずれか一項に記載のインターロゲーションシステム。
- 該インターロゲーションシステムは、さらに、戻ってモニタされる反射光学素子から光増幅およびゲート手段を通って帰還する光パルスをモニタ中の該反射光学素子の方向へルーティングするように設計された光信号ルーティング手段を含む、請求項1〜10のいずれか一項に記載のインターロゲーションシステム。
- 該光信号ルーティング手段は、該光増幅およびゲート手段の後に設けられた光反射器を含み、該光反射器の反射におけるスペクトルプロファイルは、一以上のモニタされる反射光学素子によって占められるものと同一のスペクトル帯域をカバーし、光信号が光増幅およびゲート手段から反射器へ透過し、そして光増幅およびゲート手段へ戻るのに要する時間ならびに光増幅およびゲート手段をスイッチオンする電気駆動パルスの継続時間よりも確実に短くするように該反射器は該光増幅およびゲート手段に十分近くに位置する、請求項11に記載のインターロゲーションシステム。
- 該光増幅およびゲート手段の後に一連の光反射器が設けられ、各反射器は、該光増幅およびゲート手段から異なる距離に位置し、光信号が光増幅およびゲート手段から最も遠方の反射器に透過し、そして光増幅およびゲート手段へ戻るのに要する時間を該光増幅およびゲート手段をスイッチオンする電気駆動パルスの継続時間よりも確実に短くするように最も遠方の該反射器は該光増幅およびゲート手段に充分近くに位置する、請求項12に記載のインターロゲーションシステム。
- 各光反射器の反射における該スペクトルプロファイルは、異なるスペクトル帯域をカバーする、請求項13に記載のインターロゲーションシステム。
- 一端を一以上の反射光学素子に結合した光導波路を含み、該光導波路は、他端を請求項1〜14のいずれか一項に記載の光インターロゲーションシステムに結合させる光センサシステム。
- 該光センサシステムは、好ましくは光導波路グレーティングの離隔したアレイに結合する光導波路を含む、請求項15に記載の光センサシステム。
- 該アレイ内の各グレーティングの共振波長は、同一波長窓内にあり、これにより全グレーティングが単一の光チャンネル内で作動する、請求項16に記載のセンサシステム。
- 該アレイ内グレーティングは、グループごとに配置され、各グループは、実質的に同一のグレーティングセットを含み、モニタされるグレーティングがどのグループに属するかを帰還光パルスの飛行時間が同定できるように、一グループ内の各グレーティングの共振波長が異なる波長窓内に存在して、これにより異なる光チャンネル内で作動する、請求項17に記載のセンサシステム。
- 該反射光学素子または各反射光学素子はバルクオプティックファブリー−ペローエタロン、光ファイバファブリー−ペローエタロン、光導波路グレーティングを基礎とするファブリー−ペローエタロンであり得るファブリー−ペローエタロンデバイス;終端が鏡面であり得る光ファイバの端部;光ファイバパッチコードの端部;光ファイバの一セクション内の破断部;結晶をベースとする反射光学素子;またはミラー部材であり得る、請求項15に記載のセンサシステム。
- 該センサシステムは、複数の光導波路を含み、それぞれは一端にて一以上の反射光学素子と結合し、各導波路は個々の光増幅およびゲート手段に結合している、請求項15〜19のいずれか一項に記載のセンサシステム。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02258640.8 | 2002-12-16 | ||
EP02258640A EP1432149B1 (en) | 2002-12-16 | 2002-12-16 | Optical waveguide grating interrogation system and sensor system |
US10/665,840 | 2003-09-19 | ||
US10/665,840 US7046349B2 (en) | 2002-12-16 | 2003-09-19 | Optical interrogation system and sensor system |
PCT/GB2003/005497 WO2004056017A1 (en) | 2002-12-16 | 2003-12-15 | Optical interrogation system and sensor system |
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JP2006524793A true JP2006524793A (ja) | 2006-11-02 |
JP4817423B2 JP4817423B2 (ja) | 2011-11-16 |
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JP2005502463A Expired - Fee Related JP4817423B2 (ja) | 2002-12-16 | 2003-12-15 | 光インターロゲーションシステムおよびセンサシステム |
Country Status (7)
Country | Link |
---|---|
US (1) | US7046349B2 (ja) |
EP (1) | EP1432149B1 (ja) |
JP (1) | JP4817423B2 (ja) |
CN (1) | CN1726664B (ja) |
AT (1) | ATE369670T1 (ja) |
DE (1) | DE60221681T2 (ja) |
ES (1) | ES2294086T3 (ja) |
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CN1726664A (zh) | 2006-01-25 |
DE60221681T2 (de) | 2008-04-30 |
ES2294086T3 (es) | 2008-04-01 |
US20040113056A1 (en) | 2004-06-17 |
US7046349B2 (en) | 2006-05-16 |
JP4817423B2 (ja) | 2011-11-16 |
EP1432149B1 (en) | 2007-08-08 |
EP1432149A1 (en) | 2004-06-23 |
ATE369670T1 (de) | 2007-08-15 |
DE60221681D1 (de) | 2007-09-20 |
CN1726664B (zh) | 2010-09-08 |
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