JP2022539767A - 光ファイバ測定システム、測定システム内への通信光ファイバの適合方法、及び光ファイバ測定通信システム - Google Patents
光ファイバ測定システム、測定システム内への通信光ファイバの適合方法、及び光ファイバ測定通信システム Download PDFInfo
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- 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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- H—ELECTRICITY
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- 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
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
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- H04B10/07957—Monitoring or measuring wavelength
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- 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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- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/08—Testing mechanical properties
- G01M11/083—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT]
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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
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
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- G01M11/3172—Reflectometers detecting the back-scattered light in the frequency-domain, e.g. OFDR, FMCW, heterodyne detection
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- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
- G01M5/0058—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems of elongated objects, e.g. pipes, masts, towers or railways
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- H—ELECTRICITY
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- 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
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2581—Multimode transmission
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Abstract
Description
Δneffjは、光学距離の変化を使用して測定される第jモードの実効屈折率の変化;
(dn/dT)jは、温度による影響を受ける第jモードの実効屈折率の変化を表す、校正において求められる係数;
(dn/dε)jは、歪みによる影響を受ける第jモードの実効屈折率の変化を表す、校正において求められる係数;
ΔTは、温度変化;
Δεは、歪みを表す長さの相対変化である。
Claims (15)
- 方向性デバイス(4)を備える光路を介して接続された制御される光生成システム(1)及び受信システム(2)を有し、前記光生成システム(1)を制御するとともに前記受信システム(2)からの信号を受信して処理する処理ユニット(9)を更に有する光ファイバ測定システムであって、
該光ファイバ測定システムは、選択的モードデバイス(5)を有し、該選択的モードデバイス(5)を介して光ファイバ遠隔通信ネットワークに接続されるように適合され、前記処理ユニット(9)は、光学距離の変化を測定するとともにそれらの変化を処理して少なくとも1つのパラメータにするOFDR測定技法及び/又はCOTDR測定技法を実施するように適合されることを特徴とする、光ファイバ測定システム。 - 前記選択的モードデバイス(5)は、モードフィルタであることを特徴とする、請求項1に記載の光ファイバ測定システム。
- 前記選択的モードデバイス(5)は、選択的モード励起システムであることを特徴とする、請求項1に記載の光ファイバ測定システム。
- 前記選択的モードデバイス(5)は、高次モードの損失を選択的に増加させるデバイスによって構成されることを特徴とする、請求項1又は2に記載の光ファイバ測定システム。
- 前記選択的モードデバイス(5)は、ホログラフィックプレート又は一続きのホログラフィックプレートであることを特徴とする、請求項1~3のいずれか1項に記載の光ファイバ測定システム。
- 前記選択的モードデバイス(5)は、非対称カプラのシステムであることを特徴とする、請求項1~3のいずれか1項に記載の光ファイバ測定システム。
- 前記処理ユニット(9)は、前記測定された光学距離をフィルタリングする周波数フィルタリングモジュールを有することを特徴とする、請求項1~6のいずれか1項に記載の光ファイバ測定システム。
- 前記選択的モードデバイス(5)は、前記処理ユニット(9)に接続されて制御され、異なる次数のモードの連続する励起に適合されるとともに、前記処理ユニット(9)は、異なる次数の少なくとも2つのモードによって前記測定において少なくとも2つのパラメータを求めることに適合されることを特徴とする、請求項1~7のいずれか1項に記載の光ファイバ測定システム。
- 前記処理ユニット(9)は、異なる次数の少なくとも3つのモードによって前記測定において2つのパラメータを求めることに適合されることを特徴とする、請求項8に記載の光ファイバ測定システム。
- 前記光ファイバ測定システムは、遠隔通信ネットワークに接続するためのカプラ(6)及び光ファイバセクション(8)を更に有することを特徴とする、請求項1~9のいずれか1項に記載の光ファイバ測定システム。
- 20μm以上のコア直径を有する遠隔通信光ファイバ(7)の測定システム内への適合方法であって、
前記遠隔通信光ファイバ(7)は、方向性デバイス(4)によって接続された制御される光生成システム(1)及び受信システム(2)を有する前記測定システムの光路に選択的モードデバイス(5)を介して接続されることを特徴とする、方法。 - 前記遠隔通信光ファイバ(7)は、請求項10に記載の光ファイバ測定システムに接続され、前記遠隔通信ネットワークの前記光ファイバ(7)は、カットされて前記カプラ(6)に接続されることを特徴とする、請求項11に記載の方法。
- データ伝送と、物理量を表すパラメータの特定とを行う光ファイバ測定通信システムであって、該光ファイバ測定通信システムは、直径が20μm以上のコアを有する遠隔通信光ファイバ(7)に接続された送信機及び受信機を備える遠隔通信ネットワークに接続される、請求項1~10のいずれか1項に記載の少なくとも1つの光ファイバ測定システムを備え、前記送信機の波長は、前記光生成システム(1)の前記波長と少なくとも10nm異なることを特徴とする、光ファイバ測定通信システム。
- 前記遠隔通信光ファイバ(7)は、47μmよりも大きなコア直径を有することを特徴とする、請求項13に記載の光ファイバ測定通信システム。
- 前記送信機は900nmよりも短い波長で動作し、前記光生成システム(1)は1000nmよりも長い波長で動作することを特徴とする、請求項13又は14に記載の光ファイバ測定通信システム。
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PL43040619 | 2019-06-28 | ||
PLPL430406 | 2019-06-28 | ||
PCT/IB2020/056069 WO2020261207A1 (en) | 2019-06-28 | 2020-06-26 | Fibre-optic measurement system, method of adaptation of the communication optical fibre into a measurement system, and fibre-optic measurement and communication system |
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US (1) | US20220123835A1 (ja) |
EP (1) | EP3991324A1 (ja) |
JP (1) | JP2022539767A (ja) |
KR (1) | KR20220027217A (ja) |
CN (1) | CN114303327A (ja) |
AU (1) | AU2020307661B2 (ja) |
CA (1) | CA3145173A1 (ja) |
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GB0303155D0 (en) * | 2003-02-12 | 2003-03-19 | Sensornet Ltd | Distributed sensor |
DE102007004891A1 (de) * | 2007-01-31 | 2008-08-14 | CCS Technology, Inc., Wilmington | Optischer Verzweiger |
US8077314B2 (en) * | 2007-10-15 | 2011-12-13 | Schlumberger Technology Corporation | Measuring a characteristic of a multimode optical fiber |
US7668411B2 (en) * | 2008-06-06 | 2010-02-23 | Schlumberger Technology Corporation | Distributed vibration sensing system using multimode fiber |
US10485422B2 (en) * | 2009-02-19 | 2019-11-26 | Manish Dinkarrao Kulkarni | System and method for imaging subsurface of specimen |
ES2388629B1 (es) * | 2009-05-22 | 2013-08-27 | Consejo Superior De Investigaciones Científicas (Csic) | Sistema para la mejora del rango dinámico y la reducción de la incertidumbre de medida en sensores distribuidos sobre fibra óptica. |
US9429466B2 (en) * | 2013-10-31 | 2016-08-30 | Halliburton Energy Services, Inc. | Distributed acoustic sensing systems and methods employing under-filled multi-mode optical fiber |
JP6356039B2 (ja) * | 2014-10-20 | 2018-07-11 | 古河電気工業株式会社 | 光ファイバの測定方法および測定装置 |
PL229961B1 (pl) * | 2016-04-21 | 2018-09-28 | Polskie Centrum Fotoniki I Swiatlowodow | Urządzenie do selektywnego zwiększania strat modów wyższych rzędów |
CN109073364B (zh) * | 2016-06-29 | 2021-02-05 | 直观外科手术操作公司 | 用于ofdr解调仪监测和优化的方法和装置 |
US10484094B2 (en) * | 2016-08-30 | 2019-11-19 | Macquarie University | Optical signal transmission system, a method for transmitting a plurality of optical signals, and a method for making a photonic device |
WO2018089636A1 (en) * | 2016-11-11 | 2018-05-17 | Carrier Corporation | High sensitivity fiber optic based detection |
US20180266808A1 (en) * | 2017-03-20 | 2018-09-20 | Photon Kinetics, Inc. | Systems and methods for testing optical fiber |
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AU2020307661B2 (en) | 2023-02-23 |
CA3145173A1 (en) | 2020-12-30 |
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CN114303327A (zh) | 2022-04-08 |
US20220123835A1 (en) | 2022-04-21 |
MX2021015577A (es) | 2022-03-02 |
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