JPS5679938A - Detection system for more than one fault point of optical fiber - Google Patents

Detection system for more than one fault point of optical fiber

Info

Publication number
JPS5679938A
JPS5679938A JP15785979A JP15785979A JPS5679938A JP S5679938 A JPS5679938 A JP S5679938A JP 15785979 A JP15785979 A JP 15785979A JP 15785979 A JP15785979 A JP 15785979A JP S5679938 A JPS5679938 A JP S5679938A
Authority
JP
Japan
Prior art keywords
optical fiber
fault point
detection system
output
converter
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
JP15785979A
Other languages
Japanese (ja)
Inventor
Tomoyuki Otsuka
Eizo Miyauchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15785979A priority Critical patent/JPS5679938A/en
Publication of JPS5679938A publication Critical patent/JPS5679938A/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
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR

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)

Abstract

PURPOSE:To detect a fault point securely by carrying out the detection on the basis of the power of light incident to an optical fiber, spikes of a reflected wave, etc. CONSTITUTION:Light is sent into optical fiber 6 by pulse generator 3 and laser oscillator 4. A reflected wave from optical fiber 6 enters photodetector 7. The output of this detector 7 is amplified by amplifier 8, whose output is sent to A/D converter 9. The analog/digital conversion output of A/D converter 9 is stored in memory 10 through microprocessor 1 and fault points of optical fiber 6 are displayed on display unit 12.
JP15785979A 1979-12-05 1979-12-05 Detection system for more than one fault point of optical fiber Pending JPS5679938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15785979A JPS5679938A (en) 1979-12-05 1979-12-05 Detection system for more than one fault point of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15785979A JPS5679938A (en) 1979-12-05 1979-12-05 Detection system for more than one fault point of optical fiber

Publications (1)

Publication Number Publication Date
JPS5679938A true JPS5679938A (en) 1981-06-30

Family

ID=15658935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15785979A Pending JPS5679938A (en) 1979-12-05 1979-12-05 Detection system for more than one fault point of optical fiber

Country Status (1)

Country Link
JP (1) JPS5679938A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654520A (en) * 1981-08-24 1987-03-31 Griffiths Richard W Structural monitoring system using fiber optics
US4732469A (en) * 1984-08-18 1988-03-22 Iwatsu Electric Co., Ltd. Low noise optical time domain reflectometer
JPS6425030A (en) * 1987-07-02 1989-01-27 Philips Nv Photometry
US4914288A (en) * 1986-12-11 1990-04-03 Plessy Overseas Limited Optical sensing system with averaging circuit
US5026141A (en) * 1981-08-24 1991-06-25 G2 Systems Corporation Structural monitoring system using fiber optics

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5441001A (en) * 1977-09-07 1979-03-31 Fujitsu Ltd Fault locating system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5441001A (en) * 1977-09-07 1979-03-31 Fujitsu Ltd Fault locating system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4654520A (en) * 1981-08-24 1987-03-31 Griffiths Richard W Structural monitoring system using fiber optics
US5026141A (en) * 1981-08-24 1991-06-25 G2 Systems Corporation Structural monitoring system using fiber optics
US4732469A (en) * 1984-08-18 1988-03-22 Iwatsu Electric Co., Ltd. Low noise optical time domain reflectometer
US4914288A (en) * 1986-12-11 1990-04-03 Plessy Overseas Limited Optical sensing system with averaging circuit
JPS6425030A (en) * 1987-07-02 1989-01-27 Philips Nv Photometry

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