JPS56115926A - Measuring method for dispersion of wavelength - Google Patents

Measuring method for dispersion of wavelength

Info

Publication number
JPS56115926A
JPS56115926A JP1788580A JP1788580A JPS56115926A JP S56115926 A JPS56115926 A JP S56115926A JP 1788580 A JP1788580 A JP 1788580A JP 1788580 A JP1788580 A JP 1788580A JP S56115926 A JPS56115926 A JP S56115926A
Authority
JP
Japan
Prior art keywords
wavelength
frequency
waves
sine
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
JP1788580A
Other languages
Japanese (ja)
Inventor
Kenji Okada
Ikutaro Kobayashi
Kunio Hashimoto
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
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 JP1788580A priority Critical patent/JPS56115926A/en
Publication of JPS56115926A publication Critical patent/JPS56115926A/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
    • G01M11/333—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
    • G01M11/335—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)
  • Spectrometry And Color Measurement (AREA)

Abstract

PURPOSE:To avoid the influence of distorsion of a pulse by using a white light source modulated by repeated waves such as sine waves and by measuring the dispersion of wavelength by the use of interference of the sine waves. CONSTITUTION:A white light source signal modulator 102 is modulated intensively by a generator 101 of a sine wave of frequency (f) and a light modulated intensively is made to fall on a fiber 103 to be measured having the length L. Then, when signalling lights of required wavelengths lambda1 and lambda2 are extracted by a spectroscope 104, the dispersion of the wavelength can be performed in an optional band of wavelength. The required wavelengths lambda1 and lambda2 are extracted by the spectroscope 104, the envelope of the light of respective wavelength is detected by light-electric signal transducers 105 and 106 to reproduce since waves, the respective sine waves are added by a synthesizer 107 and the level thereof is read by a level meter 108. When the frequency is selected and amplified with the frequency (f) frequency (f) with the sine-wave generator 101 after light-electric transducing at this time, the signal-to-noise ratio of a received signal can be improved.
JP1788580A 1980-02-18 1980-02-18 Measuring method for dispersion of wavelength Pending JPS56115926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1788580A JPS56115926A (en) 1980-02-18 1980-02-18 Measuring method for dispersion of wavelength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1788580A JPS56115926A (en) 1980-02-18 1980-02-18 Measuring method for dispersion of wavelength

Publications (1)

Publication Number Publication Date
JPS56115926A true JPS56115926A (en) 1981-09-11

Family

ID=11956152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1788580A Pending JPS56115926A (en) 1980-02-18 1980-02-18 Measuring method for dispersion of wavelength

Country Status (1)

Country Link
JP (1) JPS56115926A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147251A2 (en) * 1983-10-31 1985-07-03 Fujitsu Limited Method and apparatus for measuring chromatic dispersion coefficient

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299842A (en) * 1976-02-17 1977-08-22 Nippon Telegr & Teleph Corp <Ntt> Measurement of wavelength dispersion

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299842A (en) * 1976-02-17 1977-08-22 Nippon Telegr & Teleph Corp <Ntt> Measurement of wavelength dispersion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147251A2 (en) * 1983-10-31 1985-07-03 Fujitsu Limited Method and apparatus for measuring chromatic dispersion coefficient

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