JPS6486032A - Optical fiber evaluator - Google Patents

Optical fiber evaluator

Info

Publication number
JPS6486032A
JPS6486032A JP24251887A JP24251887A JPS6486032A JP S6486032 A JPS6486032 A JP S6486032A JP 24251887 A JP24251887 A JP 24251887A JP 24251887 A JP24251887 A JP 24251887A JP S6486032 A JPS6486032 A JP S6486032A
Authority
JP
Japan
Prior art keywords
optical fiber
light
length
wise
rayleigh scattered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP24251887A
Other languages
Japanese (ja)
Inventor
Noburu Shibata
Mitsuhiro Tatsuta
Yutaka Katsuyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP24251887A priority Critical patent/JPS6486032A/en
Publication of JPS6486032A publication Critical patent/JPS6486032A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G01M11/319—Reflectometers using stimulated back-scatter, e.g. Raman or fibre amplifiers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To evaluate a length-wise fluctuation of a wave guide parameter, by extracting and detecting a back Rayleigh scattered waveform with respect to length-wise positions of an optical fiber to measure a Brillouin gain distribution for the light detected. CONSTITUTION:Light from an inspection light source 1 brings a back Rayleigh scattered light from an optical fiber 13 to perform a photo and photoheterodyne detection of a local oscillation laser 18 with a photo detector 19. Here, a portion along of the back Rayleigh scattered light waveform corresponding to a desired optical fiber length-wise position is extracted with a waveform shaping optical element 14 to detect light. Thus, an output from the photo detector 19 is inputted into a lock-in amplifier 24 as input thereinto 24 while a signal from a modulator 6 done so as reference signal thereby enabling the outputting of a Brillouin gain distribution with respect to a noted position along the length of the optical fiber as function of a sweep light frequency of an inspection light source 1 being swept with an oscillator 2.
JP24251887A 1987-09-29 1987-09-29 Optical fiber evaluator Pending JPS6486032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24251887A JPS6486032A (en) 1987-09-29 1987-09-29 Optical fiber evaluator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24251887A JPS6486032A (en) 1987-09-29 1987-09-29 Optical fiber evaluator

Publications (1)

Publication Number Publication Date
JPS6486032A true JPS6486032A (en) 1989-03-30

Family

ID=17090299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24251887A Pending JPS6486032A (en) 1987-09-29 1987-09-29 Optical fiber evaluator

Country Status (1)

Country Link
JP (1) JPS6486032A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0282133A (en) * 1988-09-19 1990-03-22 Fujikura Ltd Method and instrument for measuring strain of optical fiber
JPH10111171A (en) * 1996-10-03 1998-04-28 Hitachi Cable Ltd Optical fiber strain distribution sensor
WO2007086357A1 (en) * 2006-01-27 2007-08-02 The University Of Tokyo Optical fiber characteristic measuring device and optical fiber characteristics measuring method
GB2443993A (en) * 2005-12-01 2008-05-21 Yokogawa Electric Corp Optical fibre characteristic measuring apparatus and optical fibre characteristic measuring method
CN102620857A (en) * 2012-03-27 2012-08-01 南京大学 Brillouin Optical Time Domain Reflectometer for Single Photon Detection Based on Edge Filtering Method
WO2012165587A1 (en) * 2011-05-31 2012-12-06 日本電信電話株式会社 Device for analyzing optical fiber path characteristics and method for analyzing same
JP2017049255A (en) * 2015-09-02 2017-03-09 リオス テクノロジー ゲーエムベーハーＬＩＯＳ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ Device and method for spatially resolved measurement of temperature and/or strain by brillouin scattering
CN107560644A (en) * 2017-07-20 2018-01-09 全球能源互联网研究院 A kind of distribution type optical fiber sensing equipment perceived based on signal multiplexing with demodulating
WO2020071128A1 (en) * 2018-10-02 2020-04-09 日本電信電話株式会社 Backscattering optical amplification device, optical pulse testing device, backscattering optical amplification method and optical pulse testing method
JP2021515192A (en) * 2018-03-14 2021-06-17 ブンデスリパブリック ドイチュラント、バートリィトン ドエヒ デン ブンデスミニスター ファ ヴィルトシャフト ウント エネルジー、ディザ バートリィトン ドエヒ デン プレジデンテン デァ ブンデスアンスタルツ ファ マトリアルフォシュン ウント−プロフン （ビーエーエム） A method for determining changes in physical parameters with the correct code and a device equipped with an optical fiber.

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0282133A (en) * 1988-09-19 1990-03-22 Fujikura Ltd Method and instrument for measuring strain of optical fiber
JPH10111171A (en) * 1996-10-03 1998-04-28 Hitachi Cable Ltd Optical fiber strain distribution sensor
US7679732B2 (en) 2005-12-01 2010-03-16 The University Of Tokyo Optical-fiber-characteristic measuring apparatus and optical-fiber-characteristic measuring method
GB2443993A (en) * 2005-12-01 2008-05-21 Yokogawa Electric Corp Optical fibre characteristic measuring apparatus and optical fibre characteristic measuring method
GB2443993B (en) * 2005-12-01 2010-03-24 Yokogawa Electric Corp Optical fiber characteristic measuring apparatus and optical fiber characteristic measuring method
GB2446761A (en) * 2006-01-27 2008-08-20 Yokogawa Electric Corp Optical fiber characteristic measuring device and optical fiber characteristic measuring method
GB2446761B (en) * 2006-01-27 2010-02-17 Yokogawa Electric Corp Optical fiber characteristic measuring apparatus and optical fiber characteristic measuring method
US7948614B2 (en) 2006-01-27 2011-05-24 The University Of Tokyo Optical-fiber-characteristic measuring device and optical-fiber-characteristic measuring method
JP4761258B2 (en) * 2006-01-27 2011-08-31 国立大学法人 東京大学 Optical fiber characteristic measuring apparatus and optical fiber characteristic measuring method
WO2007086357A1 (en) * 2006-01-27 2007-08-02 The University Of Tokyo Optical fiber characteristic measuring device and optical fiber characteristics measuring method
US8928868B2 (en) 2011-05-31 2015-01-06 Nippon Telegraph And Telephone Corporation Optical fiber line characteristic analysis apparatus and analysis method thereof
WO2012165587A1 (en) * 2011-05-31 2012-12-06 日本電信電話株式会社 Device for analyzing optical fiber path characteristics and method for analyzing same
CN103582808A (en) * 2011-05-31 2014-02-12 日本电信电话株式会社 Optical line characteristic analysis device and analysis method
JP5521118B2 (en) * 2011-05-31 2014-06-11 日本電信電話株式会社 Optical line characteristic analyzer and analysis method thereof
CN102620857A (en) * 2012-03-27 2012-08-01 南京大学 Brillouin Optical Time Domain Reflectometer for Single Photon Detection Based on Edge Filtering Method
JP2017049255A (en) * 2015-09-02 2017-03-09 リオス テクノロジー ゲーエムベーハーＬＩＯＳ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ Device and method for spatially resolved measurement of temperature and/or strain by brillouin scattering
US9933322B2 (en) 2015-09-02 2018-04-03 Lios Technology Gmbh Device and method for spatially resolved measurement of temperature strain, or both by brillouin scattering
CN107560644A (en) * 2017-07-20 2018-01-09 全球能源互联网研究院 A kind of distribution type optical fiber sensing equipment perceived based on signal multiplexing with demodulating
CN107560644B (en) * 2017-07-20 2020-01-14 全球能源互联网研究院 Distributed optical fiber sensing device based on signal multiplexing perception and demodulation
JP2021515192A (en) * 2018-03-14 2021-06-17 ブンデスリパブリック ドイチュラント、バートリィトン ドエヒ デン ブンデスミニスター ファ ヴィルトシャフト ウント エネルジー、ディザ バートリィトン ドエヒ デン プレジデンテン デァ ブンデスアンスタルツ ファ マトリアルフォシュン ウント−プロフン （ビーエーエム） A method for determining changes in physical parameters with the correct code and a device equipped with an optical fiber.
WO2020071128A1 (en) * 2018-10-02 2020-04-09 日本電信電話株式会社 Backscattering optical amplification device, optical pulse testing device, backscattering optical amplification method and optical pulse testing method
JP2020056905A (en) * 2018-10-02 2020-04-09 日本電信電話株式会社 Back-scattered light amplification device, optical pulse test apparatus, back-scattered light amplification method, and optical pulse test method

Similar Documents

Publication Publication Date Title
US4297874A (en) Apparatus for measuring a percentage of moisture and weighing of a sheet-like object
ES2146579T3 (en) MEASUREMENT OF CARBON CONTENT IN FLYING ASHES.
CN109115688B (en) Optical fiber remote measuring type multifunctional gas leakage listening instrument and method
EP0214040A3 (en) Fiber-optic sensor and method of use
DE3787337D1 (en) Method and device for the continuous measurement of the concentration of a gas component.
EP0819926A3 (en) System and method for mapping chromatic dispersion in optical fibers
JPS6486032A (en) Optical fiber evaluator
SE7903750L (en) PROCEDURE AND DEVICE FOR DETECTING FREQUENCY CHANGES
KR100468612B1 (en) Fiber Optic Brillouin OTDA(Optical Time Domain Analysis) Sensor System and the Strain Measurement Method of Large Structures
JPS5478156A (en) Detector of break point of optical fibers
JPS567037A (en) Remote substance density analyzing optical measuring apparatus
JPS57118136A (en) Fault searching method by optical fiber
KR920001184A (en) Laser beam wavelength detection method and apparatus
JPS57158503A (en) Measuring method of electric length of optical fiber
JPS5618738A (en) Measuring method for optical fiber cable
JPS54123997A (en) Remote measuring method of atmospheric components
JPS646834A (en) Instrument for measuring light emission spectrum
JPS5483458A (en) Measuring method of connection loss of optical fibers
JPS6475928A (en) Optical heterodyne detector
CN108918440A (en) A kind of Laser stealth material system and method
JPS5722528A (en) Measuring method for optical fiber transmission band
JPS5713338A (en) Measuring apparatus for concentration of sodium mist
SU721677A1 (en) Photoelectric device for measuring rectilinearity of articles
JPS5355146A (en) Optical fiber apparatus
JPS557652A (en) Mode dispersion measuring unit by optical fiber