JP2018509109A - 波長可変レーザを用いる光線路検査器 - Google Patents
波長可変レーザを用いる光線路検査器 Download PDFInfo
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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
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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
- G01M11/31—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
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3127—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR using multiple or wavelength variable input source
-
- 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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- 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
- G01M11/02—Testing optical properties
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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
- G01M11/31—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
- G01M11/3181—Reflectometers dealing with polarisation
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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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- 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
- H04B10/075—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
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
-
- 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
- H04B10/075—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
- H04B10/0799—Monitoring line transmitter or line receiver equipment
-
- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- 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
- H04B10/50—Transmitters
- H04B10/572—Wavelength control
-
- 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
- G01M11/31—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
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3145—Details of the optoelectronics or data analysis
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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Optical Communication System (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
Description
ところが、光パルスを用いる古典的なOTDRは、大まかに光線路の品質を管理するに当っては有用な道具であったが、次のような短所を持っている。
Claims (9)
- 少なくとも光線路の切断位置を測定するための光線路検査器であって、
複数の波長が交互に周期的に示される(ここで、一つの波長が繰り返して示される周期を「波長繰り返し周期」という)第1光信号を生成する第1波長可変レーザソースと、
前記第1光信号と同じでありながら調節される遅延時間を持つ第2光信号を生成する第2波長可変レーザソースと、
前記光線路に出射された第1光信号が戻ってきた反射光信号と前記第2光信号との間に干渉を引き起こして干渉信号を出力する干渉計と、を備え、
前記遅延時間を可変させつつ前記干渉信号の出力を測定することを特徴とする光線路検査器。 - 少なくとも光線路の切断位置を測定するための光線路検査器であって、
複数の波長が交互に周期的に示される(ここで、一つの波長が繰り返して示される周期を「波長繰り返し周期」という)第1光信号を生成するように第1波長制御信号によって制御される第1波長可変レーザソースと、
前記第1波長制御信号と同じでありながら調節される遅延時間を持つ第2波長制御信号によって制御されて第2光信号を生成する第2波長可変レーザソースと、
前記光線路に出射された第1光信号が戻ってきた反射光信号と前記第2光信号との間に干渉を引き起こして干渉信号を出力する干渉計と、を備え、
前記遅延時間を可変させつつ前記干渉信号の出力を測定することを特徴とする光線路検査器。 - 前記第1波長制御信号を前記遅延時間だけ遅延させて前記第2波長制御信号を出力する遅延手段をさらに備えることを特徴とする請求項2に記載の光線路検査器。
- 前記測定された出力が最大になる遅延時間を用いて前記切断位置を計算することを特徴とする請求項1または2に記載の光線路検査器。
- 二つ以上の互いに異なる前記波長繰り返し周期において、前記遅延時間を可変させつつ前記干渉信号の出力を測定し、前記二つ以上の互いに異なる波長繰り返し周期のすべてにおいて、前記測定された出力が最大になる遅延時間を用いて前記切断位置を計算することを特徴とする請求項1または2に記載の光線路検査器。
- 前記第1光信号及び前記第2光信号の光パワーは一定または連続的であることを特徴とする請求項1または2に記載の光線路検査器。
- 前記干渉計は、前記反射光信号と前記第2光信号との間の偏光を合わせるための偏光制御器を備えることを特徴とする請求項1または2に記載の光線路検査器。
- 前記干渉計から出力される光信号を電気信号に変換する光信号受信器をさらに備えることを特徴とする請求項1または2に記載の光線路検査器。
- 少なくとも光線路の切断位置を測定するための光線路検査器であって、
複数の波長が交互に周期的に示される(ここで、一つの波長が繰り返して示される周期を「波長繰り返し周期」という)光信号を生成する波長可変レーザソースを二つ備え、
前記二つの波長可変レーザソースのうち一つの波長可変レーザソースから生成される第1光信号は前記光線路に出射され、
前記二つの波長可変レーザソースのうち他の一つの波長可変レーザソースから生成された第2光信号は、可変される遅延時間が付与されたものであり、
前記第1光信号が前記光線路に出射された後で戻ってくるラウンドトリップ時間が前記第2光信号の前記遅延時間と同一または整数倍である時の干渉効果を用いて前記切断位置を測定し、前記遅延時間を可変させつつ干渉信号の出力を測定することを特徴とする光線路検査器。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR10-2014-0188002 | 2014-12-24 | ||
KR1020140188002A KR101605837B1 (ko) | 2014-12-24 | 2014-12-24 | 파장 가변 레이저를 이용한 광선로 검사기 |
PCT/KR2015/014061 WO2016105066A1 (ko) | 2014-12-24 | 2015-12-22 | 파장 가변 레이저를 이용한 광선로 검사기 |
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JP2018509109A true JP2018509109A (ja) | 2018-03-29 |
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US (2) | US10274398B2 (ja) |
JP (1) | JP6393431B2 (ja) |
KR (1) | KR101605837B1 (ja) |
CN (1) | CN107110737B (ja) |
WO (1) | WO2016105066A1 (ja) |
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CN108169175B (zh) * | 2016-12-08 | 2022-07-26 | 松下知识产权经营株式会社 | 光检测系统 |
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JP6998984B2 (ja) * | 2020-03-30 | 2022-01-18 | 東日本電信電話株式会社 | 光ケーブルの異常区間判定装置 |
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US10935457B2 (en) | 2021-03-02 |
US10274398B2 (en) | 2019-04-30 |
CN107110737B (zh) | 2020-02-18 |
JP6393431B2 (ja) | 2018-09-19 |
US20190234831A1 (en) | 2019-08-01 |
WO2016105066A1 (ko) | 2016-06-30 |
US20180017464A1 (en) | 2018-01-18 |
KR101605837B1 (ko) | 2016-03-23 |
CN107110737A (zh) | 2017-08-29 |
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