JPS5618738A - Measuring method for optical fiber cable - Google Patents

Measuring method for optical fiber cable

Info

Publication number
JPS5618738A
JPS5618738A JP9393179A JP9393179A JPS5618738A JP S5618738 A JPS5618738 A JP S5618738A JP 9393179 A JP9393179 A JP 9393179A JP 9393179 A JP9393179 A JP 9393179A JP S5618738 A JPS5618738 A JP S5618738A
Authority
JP
Japan
Prior art keywords
frequency
optical fiber
local
modulated wave
detector
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
JP9393179A
Other languages
Japanese (ja)
Other versions
JPS6337335B2 (en
Inventor
Tadatoshi Tanifuji
Hideyuki Takimoto
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 JP9393179A priority Critical patent/JPS5618738A/en
Publication of JPS5618738A publication Critical patent/JPS5618738A/en
Publication of JPS6337335B2 publication Critical patent/JPS6337335B2/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

Abstract

PURPOSE:To improve the efficiency in measuring an optical fiber cable by setting the frequency of the local oscillator of the reception unit before the arrival of the modulated wave of the corresponding frequency, and automatically and stepwisely setting the local oscillator to the subsequent frequencies after detecting said modulated wave. CONSTITUTION:The transmission end of an optical fiber 3 is provided with a sweep-type signal generator 1 and a laser source 2. The RF output signal from the signal generator 1 optically modulates the laser source 2, and the optically modulated wave is made incident on the optical fiber 3 being measured. At the reception end of the optical fiber 3, an out going ray of light is converted into electricity in a light detector 4, and the optically modulated wave component is detected. The frequency of the output of the detector 4, which varies with the lapse of sweep time, is detected and outputted only when the signal of the frequency determined according to the local-oscillated frequency f1 and the intermediate frequency is inputted to a heterodyne detector 6. Then, in the similar manner, the local-oscillated frequency is discretely varied, and the detection output and the local-oscillated frequency are recorded on a display 10.
JP9393179A 1979-07-23 1979-07-23 Measuring method for optical fiber cable Granted JPS5618738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9393179A JPS5618738A (en) 1979-07-23 1979-07-23 Measuring method for optical fiber cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9393179A JPS5618738A (en) 1979-07-23 1979-07-23 Measuring method for optical fiber cable

Publications (2)

Publication Number Publication Date
JPS5618738A true JPS5618738A (en) 1981-02-21
JPS6337335B2 JPS6337335B2 (en) 1988-07-25

Family

ID=14096170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9393179A Granted JPS5618738A (en) 1979-07-23 1979-07-23 Measuring method for optical fiber cable

Country Status (1)

Country Link
JP (1) JPS5618738A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0288829U (en) * 1988-12-20 1990-07-13
JPH0520917U (en) * 1991-08-30 1993-03-19 三菱自動車工業株式会社 Hirufuira Door

Also Published As

Publication number Publication date
JPS6337335B2 (en) 1988-07-25

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