JPS54116953A - Measurement of opening position of optical fiber - Google Patents

Measurement of opening position of optical fiber

Info

Publication number
JPS54116953A
JPS54116953A JP2418278A JP2418278A JPS54116953A JP S54116953 A JPS54116953 A JP S54116953A JP 2418278 A JP2418278 A JP 2418278A JP 2418278 A JP2418278 A JP 2418278A JP S54116953 A JPS54116953 A JP S54116953A
Authority
JP
Japan
Prior art keywords
signals
optical
fiber
electric signals
opening position
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
JP2418278A
Other languages
Japanese (ja)
Inventor
Tomoyuki Otsuka
Eizo Miyauchi
Noboru Tsuneyo
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 JP2418278A priority Critical patent/JPS54116953A/en
Publication of JPS54116953A publication Critical patent/JPS54116953A/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
    • G01M11/3172—Reflectometers detecting the back-scattered light in the frequency-domain, e.g. OFDR, FMCW, heterodyne detection

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 measure the opening position of an optical fiber by converting the electric signals, which have been subjected to FM modulation by the modulated waves of triangular waves, into optical signals to guide then into a fiber to be measured and by converting the optical signals reflected from the opening position into electric signals. CONSTITUTION:The position of the broken opening midway of an optical fiber is measured. The modulated waves of triangular waves, which are generated from an FM modulator 1, are converted by an electro-optical converter 3 into optical signals, which are guided from a half mirror 4 into a fiber 6 to be measured. The optical signals reflected at a point shown in broken line are reflected by the half mirror 4 and are converted by a photoelectric converter 8 into electric signals. The resultant electric signals are mixed with the above modulated electric signals so that beat frequency signals are taken out. From these beat signals, the maximum beat frequency signals are detected and processed by a processor 12 so that the distance L of the fiber 6 from the incident point to the broken point A can be attained.
JP2418278A 1978-03-03 1978-03-03 Measurement of opening position of optical fiber Pending JPS54116953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2418278A JPS54116953A (en) 1978-03-03 1978-03-03 Measurement of opening position of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2418278A JPS54116953A (en) 1978-03-03 1978-03-03 Measurement of opening position of optical fiber

Publications (1)

Publication Number Publication Date
JPS54116953A true JPS54116953A (en) 1979-09-11

Family

ID=12131187

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2418278A Pending JPS54116953A (en) 1978-03-03 1978-03-03 Measurement of opening position of optical fiber

Country Status (1)

Country Link
JP (1) JPS54116953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974658A (en) * 1989-02-22 1990-12-04 Komatsu Denki Sangyo Kabushiki Kaisha Sheet shutter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4974658A (en) * 1989-02-22 1990-12-04 Komatsu Denki Sangyo Kabushiki Kaisha Sheet shutter

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