JPS5651635A - Measuring method for material dispersion of optical fiber - Google Patents

Measuring method for material dispersion of optical fiber

Info

Publication number
JPS5651635A
JPS5651635A JP12715679A JP12715679A JPS5651635A JP S5651635 A JPS5651635 A JP S5651635A JP 12715679 A JP12715679 A JP 12715679A JP 12715679 A JP12715679 A JP 12715679A JP S5651635 A JPS5651635 A JP S5651635A
Authority
JP
Japan
Prior art keywords
light
optical fiber
lambdao
lambdai
material dispersion
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
JP12715679A
Other languages
Japanese (ja)
Inventor
Masamitsu Tokuda
Keiichiro Iwasaki
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.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries 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 Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP12715679A priority Critical patent/JPS5651635A/en
Publication of JPS5651635A publication Critical patent/JPS5651635A/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
    • G01M11/33—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
    • G01M11/333—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 modulated 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
    • G01M11/336—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 polarization mode dispersion [PMD]

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To make it possible to take a separate measurement of only the effect of material dispersion with high precision by causing two beams, amplitude-modulated by a single sine wave, to strike optical fiber simultaneously and by measuring the phase difference between modulated signals by selectively detecting those signals. CONSTITUTION:Light of wavelength lambdai from a light source and polarizing device 2, when passing through external modulator 3, is amplitude-modulated into a sine shape with a signal from electric signal generator 5 simultaneously with light of wavelength lambdao from single-wavelength light source 1. Two lights of lambdao and lambdai are mixed into one by synthesizer 4 before striking optical fiber 6. The light having propagated through optical fiber 6 is polarized by polarizer 7 so that light of lambdao will reach detector 8 and that of lambdai will reach detector 9. Electric signals obtained by detectors 8 and 9 are supplied to phase difference measurer 10 to measure their phase difference, on the basis of which the effect of material dispersion is found.
JP12715679A 1979-10-01 1979-10-01 Measuring method for material dispersion of optical fiber Pending JPS5651635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12715679A JPS5651635A (en) 1979-10-01 1979-10-01 Measuring method for material dispersion of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12715679A JPS5651635A (en) 1979-10-01 1979-10-01 Measuring method for material dispersion of optical fiber

Publications (1)

Publication Number Publication Date
JPS5651635A true JPS5651635A (en) 1981-05-09

Family

ID=14953012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12715679A Pending JPS5651635A (en) 1979-10-01 1979-10-01 Measuring method for material dispersion of optical fiber

Country Status (1)

Country Link
JP (1) JPS5651635A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4984884A (en) * 1988-05-18 1991-01-15 Kokusai Denshin Denwa Co., Ltd. Method for measuring dispersion characteristics of an optical fiber
EP0423437A2 (en) * 1989-10-17 1991-04-24 Leica Aarau AG Method and device for testing optical fibers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4984884A (en) * 1988-05-18 1991-01-15 Kokusai Denshin Denwa Co., Ltd. Method for measuring dispersion characteristics of an optical fiber
EP0423437A2 (en) * 1989-10-17 1991-04-24 Leica Aarau AG Method and device for testing optical fibers

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