JPS5724836A - Measurement of group delay time difference by mode groups for multimode optical fiber scope - Google Patents

Measurement of group delay time difference by mode groups for multimode optical fiber scope

Info

Publication number
JPS5724836A
JPS5724836A JP9933380A JP9933380A JPS5724836A JP S5724836 A JPS5724836 A JP S5724836A JP 9933380 A JP9933380 A JP 9933380A JP 9933380 A JP9933380 A JP 9933380A JP S5724836 A JPS5724836 A JP S5724836A
Authority
JP
Japan
Prior art keywords
optical fiber
mirror
light
delay time
time difference
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
JP9933380A
Other languages
Japanese (ja)
Other versions
JPH0118371B2 (en
Inventor
Noburu Shibata
Mitsuhiro Tatsuta
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 JP9933380A priority Critical patent/JPS5724836A/en
Publication of JPS5724836A publication Critical patent/JPS5724836A/en
Publication of JPH0118371B2 publication Critical patent/JPH0118371B2/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
    • G01M11/331—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 using interferometer

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)
  • Instruments For Measurement Of Length By Optical Means (AREA)

Abstract

PURPOSE:To obtain the group delay time difference by mode groups, by measuring definition of interference pattern caused by light emitted from an optical fiber scope to be measured and a reference optical fiber scope. CONSTITUTION:An interferable light 2 from an interferable light source 1 is given to an optical fiber 5 to be measured and also to a reference optical fiber 6 through a semitransparent mirror 3, and lights emitted from the optical fibers 5 and 6 are made to pass through a light deflector 8 and a light attenuator 9 and then compounded by a semitransparent mirror 10. And then, an interferable distance adjusting medium 12 and the attenuator 9 are adjusted so that an optical path to the mirror 11 and light intensity become equalized. And then, for the basic mode group, a position of the mirror 11 at the time of maximum definition of interfering pattern is found. And then, for another given mode group, a position of the mirror 11 at the time of maximum definition is again sought. And, it becomes possible to seek group delay time difference by mode groups from shifting distance of the mirror 11.
JP9933380A 1980-07-22 1980-07-22 Measurement of group delay time difference by mode groups for multimode optical fiber scope Granted JPS5724836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9933380A JPS5724836A (en) 1980-07-22 1980-07-22 Measurement of group delay time difference by mode groups for multimode optical fiber scope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9933380A JPS5724836A (en) 1980-07-22 1980-07-22 Measurement of group delay time difference by mode groups for multimode optical fiber scope

Publications (2)

Publication Number Publication Date
JPS5724836A true JPS5724836A (en) 1982-02-09
JPH0118371B2 JPH0118371B2 (en) 1989-04-05

Family

ID=14244695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9933380A Granted JPS5724836A (en) 1980-07-22 1980-07-22 Measurement of group delay time difference by mode groups for multimode optical fiber scope

Country Status (1)

Country Link
JP (1) JPS5724836A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6147533A (en) * 1984-08-13 1986-03-08 Nippon Telegr & Teleph Corp <Ntt> Method and apparatus for measuring group delay time difference of optical fiber
JP2006267107A (en) * 2005-03-23 2006-10-05 Kwangju Inst Of Science & Technol Multimode optical fiber delay time difference measuring device
KR100803473B1 (en) 2006-02-06 2008-02-14 광주과학기술원 Inter mode delay time measurement system of multimode optical fiber
KR100803488B1 (en) 2006-02-03 2008-02-14 광주과학기술원 Chromatic Dispersion Measurement System for Higher Order Modes of Multimode Fibers Using Interferometer
JP2017036967A (en) * 2015-08-07 2017-02-16 Kddi株式会社 Propagation delay difference measuring apparatus and propagation delay measuring apparatus
JP2018534547A (en) * 2015-09-18 2018-11-22 ポルスキ セントラム フォトニキ イ シフィアトヴァドフＰｏｌｓｋｉｅ Ｃｅｎｔｒｕｍ Ｆｏｔｏｎｉｋｉ Ｉ Ｓｗｉａｔｌｏｗｏｄｏｗ Apparatus and method for measuring phase element parameters and optical fiber dispersion

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6147533A (en) * 1984-08-13 1986-03-08 Nippon Telegr & Teleph Corp <Ntt> Method and apparatus for measuring group delay time difference of optical fiber
JP2006267107A (en) * 2005-03-23 2006-10-05 Kwangju Inst Of Science & Technol Multimode optical fiber delay time difference measuring device
KR100719892B1 (en) 2005-03-23 2007-05-18 광주과학기술원 Differential delay time measurement device between modes of multimode fiber
KR100803488B1 (en) 2006-02-03 2008-02-14 광주과학기술원 Chromatic Dispersion Measurement System for Higher Order Modes of Multimode Fibers Using Interferometer
KR100803473B1 (en) 2006-02-06 2008-02-14 광주과학기술원 Inter mode delay time measurement system of multimode optical fiber
JP2017036967A (en) * 2015-08-07 2017-02-16 Kddi株式会社 Propagation delay difference measuring apparatus and propagation delay measuring apparatus
JP2018534547A (en) * 2015-09-18 2018-11-22 ポルスキ セントラム フォトニキ イ シフィアトヴァドフＰｏｌｓｋｉｅ Ｃｅｎｔｒｕｍ Ｆｏｔｏｎｉｋｉ Ｉ Ｓｗｉａｔｌｏｗｏｄｏｗ Apparatus and method for measuring phase element parameters and optical fiber dispersion

Also Published As

Publication number Publication date
JPH0118371B2 (en) 1989-04-05

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