JPS56108933A - Measuring method for nfp of optical fiber - Google Patents

Measuring method for nfp of optical fiber

Info

Publication number
JPS56108933A
JPS56108933A JP1119080A JP1119080A JPS56108933A JP S56108933 A JPS56108933 A JP S56108933A JP 1119080 A JP1119080 A JP 1119080A JP 1119080 A JP1119080 A JP 1119080A JP S56108933 A JPS56108933 A JP S56108933A
Authority
JP
Japan
Prior art keywords
optical fiber
light
nfp
collecting
measuring method
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
JP1119080A
Other languages
Japanese (ja)
Inventor
Masamitsu Tokuda
Akihide Ueki
Shintaro Izutsui
Yoshikazu Matsuda
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.)
Furukawa Electric Co Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Furukawa Electric Co Ltd
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 Furukawa Electric Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Furukawa Electric Co Ltd
Priority to JP1119080A priority Critical patent/JPS56108933A/en
Publication of JPS56108933A publication Critical patent/JPS56108933A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To measure the specific refractivity of an optical fiber by providing a light-collecting optical fiber large in core diameter and NA at the side of the light incidence end of the optical fiber to be measured. CONSTITUTION:Light emitted from light source 1 is passed through object lenses 2a and 2b and light attenuator 3 located between said lenses. Further, when this light is passed through optical fiber 4, the light incidence conditions of optical fiber 4 are relieved by providing light-collecting optical fiber 12 at the side of light incidence end 5a of optical fiber 4, and light power from light emission end 5b is made proportional to the specific refractivity of optical fiber 4. Light-collecting optical fiber 12 should have the core diameter and NA greater than those of optical fiber 4 to be measured by several - tens times. Thus, light is made to inject optical fiber 4 with the stable quantity of the light.
JP1119080A 1980-02-01 1980-02-01 Measuring method for nfp of optical fiber Pending JPS56108933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1119080A JPS56108933A (en) 1980-02-01 1980-02-01 Measuring method for nfp of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1119080A JPS56108933A (en) 1980-02-01 1980-02-01 Measuring method for nfp of optical fiber

Publications (1)

Publication Number Publication Date
JPS56108933A true JPS56108933A (en) 1981-08-28

Family

ID=11771138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1119080A Pending JPS56108933A (en) 1980-02-01 1980-02-01 Measuring method for nfp of optical fiber

Country Status (1)

Country Link
JP (1) JPS56108933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020112704A1 (en) * 2018-11-27 2020-06-04 Afl Telecommunications Llc Large core apparatus for measuring optical power in multifiber cables

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419385A (en) * 1977-07-14 1979-02-14 Sumitomo Electric Ind Ltd Semiconductor light emitting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419385A (en) * 1977-07-14 1979-02-14 Sumitomo Electric Ind Ltd Semiconductor light emitting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020112704A1 (en) * 2018-11-27 2020-06-04 Afl Telecommunications Llc Large core apparatus for measuring optical power in multifiber cables
US11898928B2 (en) 2018-11-27 2024-02-13 Afl Telecommunications Llc Large core apparatus for measuring optical power in multifiber cables

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