JPS55128134A - Determination system for obstruction point of optical fiber - Google Patents

Determination system for obstruction point of optical fiber

Info

Publication number
JPS55128134A
JPS55128134A JP3638479A JP3638479A JPS55128134A JP S55128134 A JPS55128134 A JP S55128134A JP 3638479 A JP3638479 A JP 3638479A JP 3638479 A JP3638479 A JP 3638479A JP S55128134 A JPS55128134 A JP S55128134A
Authority
JP
Japan
Prior art keywords
wave
optical
fiber
light
lambda2
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.)
Granted
Application number
JP3638479A
Other languages
Japanese (ja)
Other versions
JPS5651285B2 (en
Inventor
Ikutaro Kobayashi
Tetsuya Miki
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 JP3638479A priority Critical patent/JPS55128134A/en
Publication of JPS55128134A publication Critical patent/JPS55128134A/en
Publication of JPS5651285B2 publication Critical patent/JPS5651285B2/ja
Granted 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
    • G01M11/33—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
    • G01M11/332—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 using discrete input signals
    • 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
    • G01M11/335—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 using two or more input wavelengths
    • 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
    • G01M11/338—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 measuring dispersion other than PMD, e.g. chromatic dispersion

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

PURPOSE:To determine an obstruction point in an optical fiber, where rays of light are not reflected, without providing signal lines between both of terminal measuring instrumenrs, by simultaneously being propagating rays of light with different wavelength to determine the obstruction point in the optical fiber from difference between the times of the interruption of both of optical signals at a light receiving terminal. CONSTITUTION:Pulse rows with different optical wave-length lambda1, lambda2 are formed by optical modulators 31, 32 according to pulse rows put out from a pulse generator 11 and projected to an optical cable fiber 13 through a wave composer 33. As a result, the velocities of optical pulses being propagated through the fiber 13 in response to the wave-length lambda1, lambda2 due to the dispersion characteristics of the fiber 13. Thus, when difference between the arrival times of the pulse light of the wave-length lambda1, lambda2 at the time of the occurrence of obstruction is detected by a wave divider 34, observing units 15, 23 corresponding to the wave-length lambda1, lambda2 of optical pulses and a comparator 26, which are provided at a light receiving terminal, an obstruction point where rays of light are not reflected can also be determined without providing signal lines between both of terminal measuring instruments by operation based on a dispersion rate previously determined by the fiber 13.
JP3638479A 1979-03-28 1979-03-28 Determination system for obstruction point of optical fiber Granted JPS55128134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3638479A JPS55128134A (en) 1979-03-28 1979-03-28 Determination system for obstruction point of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3638479A JPS55128134A (en) 1979-03-28 1979-03-28 Determination system for obstruction point of optical fiber

Publications (2)

Publication Number Publication Date
JPS55128134A true JPS55128134A (en) 1980-10-03
JPS5651285B2 JPS5651285B2 (en) 1981-12-04

Family

ID=12468343

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3638479A Granted JPS55128134A (en) 1979-03-28 1979-03-28 Determination system for obstruction point of optical fiber

Country Status (1)

Country Link
JP (1) JPS55128134A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS589039A (en) * 1981-07-10 1983-01-19 Fujitsu Ltd Monitoring system for optical transmission line

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02133003A (en) * 1988-11-11 1990-05-22 Aichi Steel Works Ltd Current collecting device for automatic transfer device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS589039A (en) * 1981-07-10 1983-01-19 Fujitsu Ltd Monitoring system for optical transmission line

Also Published As

Publication number Publication date
JPS5651285B2 (en) 1981-12-04

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