[go: up one dir, main page]

JPS5533623A - Measurement of break standardizing frequency of refractive index distribution type and transmission mode of optical fiber - Google Patents

Measurement of break standardizing frequency of refractive index distribution type and transmission mode of optical fiber

Info

Publication number
JPS5533623A
JPS5533623A JP10623878A JP10623878A JPS5533623A JP S5533623 A JPS5533623 A JP S5533623A JP 10623878 A JP10623878 A JP 10623878A JP 10623878 A JP10623878 A JP 10623878A JP S5533623 A JPS5533623 A JP S5533623A
Authority
JP
Japan
Prior art keywords
optical fiber
light
wavelength
measured
frequency
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
JP10623878A
Other languages
Japanese (ja)
Other versions
JPS5712090B2 (en
Inventor
Yasuyuki Kato
Kenichi Kitayama
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 JP10623878A priority Critical patent/JPS5533623A/en
Publication of JPS5533623A publication Critical patent/JPS5533623A/en
Publication of JPS5712090B2 publication Critical patent/JPS5712090B2/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
    • G01M11/333—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

Landscapes

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

Abstract

PURPOSE:To easily obtain the measured value of high accuracy by measuring both the wavelength, in which the group delay time difference between the modes LP01 and LP11 to be transmitted through an optical fiber to be measured is reduced to zero, and the braking wavelength of the mode LP11. CONSTITUTION:The light of a multi-spectrum light source is fed through a spectrometer so that the wavelength of an output light is continuously varied. The resultant light is subjected to frequency sweeping treatment for each wavelength by a modulator 3 so that it is guided into an optical fiber 5 to be measured. The transmitted light is converted by a detector 6 and a light receiver 7 into a demodulated signal so that the frequency characteristics are measured by an spectrum analyzer 10 and an arithmetic device 11. Incidentally, the pulse waveform, which is formed by guiding the output light of a light source of variable wavelength as a single pulse into the optical fiber so that it is transmitted, may be analyzed. If the value of f 1/2DELTAtau is determined by the frequency sweeping operation, the delay time DELTAtau can be determined by a simple calculation so that the pulse waveform analysis need not be required. Thus, it is possible to easily determined the measured value of high accuracy.
JP10623878A 1978-09-01 1978-09-01 Measurement of break standardizing frequency of refractive index distribution type and transmission mode of optical fiber Granted JPS5533623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10623878A JPS5533623A (en) 1978-09-01 1978-09-01 Measurement of break standardizing frequency of refractive index distribution type and transmission mode of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10623878A JPS5533623A (en) 1978-09-01 1978-09-01 Measurement of break standardizing frequency of refractive index distribution type and transmission mode of optical fiber

Publications (2)

Publication Number Publication Date
JPS5533623A true JPS5533623A (en) 1980-03-08
JPS5712090B2 JPS5712090B2 (en) 1982-03-09

Family

ID=14428530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10623878A Granted JPS5533623A (en) 1978-09-01 1978-09-01 Measurement of break standardizing frequency of refractive index distribution type and transmission mode of optical fiber

Country Status (1)

Country Link
JP (1) JPS5533623A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717834A (en) * 1980-07-07 1982-01-29 Nippon Telegr & Teleph Corp <Ntt> Method for measuring cut-off wavelength of optical fiber
JPS6172666U (en) * 1984-10-18 1986-05-17
US5432602A (en) * 1992-08-25 1995-07-11 Kabushiki Kaisha Toshiba Light wavelength measuring apparatus with light modulation
JP2021135179A (en) * 2020-02-27 2021-09-13 日本電信電話株式会社 Optical fiber mode group delay characteristic evaluation method and evaluation device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717834A (en) * 1980-07-07 1982-01-29 Nippon Telegr & Teleph Corp <Ntt> Method for measuring cut-off wavelength of optical fiber
JPS6172666U (en) * 1984-10-18 1986-05-17
US5432602A (en) * 1992-08-25 1995-07-11 Kabushiki Kaisha Toshiba Light wavelength measuring apparatus with light modulation
JP2021135179A (en) * 2020-02-27 2021-09-13 日本電信電話株式会社 Optical fiber mode group delay characteristic evaluation method and evaluation device

Also Published As

Publication number Publication date
JPS5712090B2 (en) 1982-03-09

Similar Documents

Publication Publication Date Title
US6525308B1 (en) Apparatus and method for wavelength detection with fiber bragg grating sensors
CA1246354A (en) Optical measuring device using a spectral modulation sensor having an optically resonant structure
DE3176220D1 (en) Fibre-optical measuring equipment
EP0263931A3 (en) Method and device for measuring continuously the concentration of a gas component
AU6069586A (en) Fibre optic sensor and method of use
JPS57196165A (en) Light intensity modulation measuring device
JPS5533623A (en) Measurement of break standardizing frequency of refractive index distribution type and transmission mode of optical fiber
JPS55142220A (en) Device for measuring wavelength
JPH0354292B2 (en)
US11754465B2 (en) Optical pulse testing device and optical pulse testing method
JPH0549057B2 (en)
Bogachkov Improved data processing algorithms in Brillouin reflectometers for determining the strain of optical fibers
CA1203702A (en) Method of measuring the cutoff wavelength of the first higher order mode in optical fibres
JPS5651636A (en) Measuring method for material dispersion characteristic of fiber
JPS6449942A (en) Physical property measuring instrument for liquid
JPS646834A (en) Instrument for measuring light emission spectrum
JP2679810B2 (en) Optical wavelength measurement device
JPS56164941A (en) Color tone discriminator
SU819649A1 (en) Moisture meter
JPS5582025A (en) Spectrophotometer of sample alternate measurement type
JPS5468657A (en) Measuring apparatus of dispersion characteristics of optical guide
SU890262A1 (en) Random signal spectrum optical analyzer
Stone Results of a Bell System bandwidth measurement round robin
BOUILLIE et al. Frequency response of optical fibers- Experimental results
JPS54130185A (en) Total raman light monitoring method and apparatus