JPS5589721A - Evaluation method for connection loss of optical cable - Google Patents

Evaluation method for connection loss of optical cable

Info

Publication number
JPS5589721A
JPS5589721A JP16422178A JP16422178A JPS5589721A JP S5589721 A JPS5589721 A JP S5589721A JP 16422178 A JP16422178 A JP 16422178A JP 16422178 A JP16422178 A JP 16422178A JP S5589721 A JPS5589721 A JP S5589721A
Authority
JP
Japan
Prior art keywords
connection
fiber
loss
processed
reflection film
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
JP16422178A
Other languages
Japanese (ja)
Inventor
Keiichiro Iwasaki
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.)
Sumitomo Electric Industries Ltd
Original Assignee
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP16422178A priority Critical patent/JPS5589721A/en
Publication of JPS5589721A publication Critical patent/JPS5589721A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3154Details of the opto-mechanical connection, e.g. connector or repeater

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

PURPOSE:To obtain the connection loss of optical cable which is measured for transmission loss in advance, by inputting optical pulse to the fiber of which connection end is processed with perfect reflection film and to the fiber one end of connected cable of which is processed with perfect refelction film, and by measuring the reflected light. CONSTITUTION:Optical pulse is incident from the input end 14 to the fiber of which connection end 7 is processed with the perfect reflection film (metal film such as Ag, Ni), and the reflection light 22 reflected on the reflection film of the connection end 7 is measured. Next, the reflection film of the connection end 7 is eliminated, and it is connected to the fiber in which one end 18 of connected cable 5 is processed with perfect reflection film, and the reflected light 23 from the fiber end is measured by incident optical light from the input end 14. The reflected light 22 receives the reduction by transmission loss 2alphaC(dB) in comparison with the light 23 while it reciprocates the optical cable 5, and further, it received the connection loss by 2alphaJ(dB) because of twice transmission of the connection 7. Thus, taking the energy loss of reflection lights as S22, S23, the connection loss alphaJ is obtained as alphaJ=(+10logS22/S23)/2-alphaC.
JP16422178A 1978-12-27 1978-12-27 Evaluation method for connection loss of optical cable Pending JPS5589721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16422178A JPS5589721A (en) 1978-12-27 1978-12-27 Evaluation method for connection loss of optical cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16422178A JPS5589721A (en) 1978-12-27 1978-12-27 Evaluation method for connection loss of optical cable

Publications (1)

Publication Number Publication Date
JPS5589721A true JPS5589721A (en) 1980-07-07

Family

ID=15788965

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16422178A Pending JPS5589721A (en) 1978-12-27 1978-12-27 Evaluation method for connection loss of optical cable

Country Status (1)

Country Link
JP (1) JPS5589721A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59112243A (en) * 1982-12-20 1984-06-28 Nippon Telegr & Teleph Corp <Ntt> Measuring method of transmission characteristics of optical fiber cable
GB2564697A (en) * 2017-07-20 2019-01-23 British Telecomm Optical fibre
US10892822B2 (en) 2017-02-01 2021-01-12 British Telecommunications Public Limited Company Optical fiber event location
US11274990B2 (en) 2017-07-20 2022-03-15 British Telecommunications Public Limited Company Optical fiber

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59112243A (en) * 1982-12-20 1984-06-28 Nippon Telegr & Teleph Corp <Ntt> Measuring method of transmission characteristics of optical fiber cable
US10892822B2 (en) 2017-02-01 2021-01-12 British Telecommunications Public Limited Company Optical fiber event location
GB2564697A (en) * 2017-07-20 2019-01-23 British Telecomm Optical fibre
GB2564697B (en) * 2017-07-20 2021-12-08 British Telecomm Optical fibre
US11274990B2 (en) 2017-07-20 2022-03-15 British Telecommunications Public Limited Company Optical fiber

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