JPS557653A - Loss measuring unit of optical fiber - Google Patents

Loss measuring unit of optical fiber

Info

Publication number
JPS557653A
JPS557653A JP8062878A JP8062878A JPS557653A JP S557653 A JPS557653 A JP S557653A JP 8062878 A JP8062878 A JP 8062878A JP 8062878 A JP8062878 A JP 8062878A JP S557653 A JPS557653 A JP S557653A
Authority
JP
Japan
Prior art keywords
fiber
optical fiber
loss
scattered
light
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
JP8062878A
Other languages
Japanese (ja)
Other versions
JPS5712089B2 (en
Inventor
Akira Sugimura
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.)
NTT Inc
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 JP8062878A priority Critical patent/JPS557653A/en
Publication of JPS557653A publication Critical patent/JPS557653A/en
Publication of JPS5712089B2 publication Critical patent/JPS5712089B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Testing Of Optical Devices Or Fibers (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE: To enable to measure the loss of optical fiber simple without cutting off the fiber, by obtaining the scattered waveform through the use of the pulse light source and obtaining the loss characteristics from it.
CONSTITUTION: The light from the pulse light source 1 having the pulse width tp enters the optical fiber 3 of test piece in the scattered light integrator 2. The scattered light of the fiber 3 is detected with the photo detector 4 and the waveform is obtained with the waveform analyzer 5. By measuring the scattered intensity at time t1 and t2, S(t1) and S(t2), the loss characteristics of the optical fiber can be obtained with equation 1. Further, the resolution is Δx=tpXC/n (where: C is light velocity in vacuum and n is the diffraction factor of the core of fiber) and it can be measured with good accuracy if the length L of the fiber 3 is sufficiently greater than Δx. Accordingly, the pulse width tp should be tp<L X n/C. Thus, the loss can simply be measured with good accuracy.
COPYRIGHT: (C)1980,JPO&Japio
JP8062878A 1978-07-03 1978-07-03 Loss measuring unit of optical fiber Granted JPS557653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8062878A JPS557653A (en) 1978-07-03 1978-07-03 Loss measuring unit of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8062878A JPS557653A (en) 1978-07-03 1978-07-03 Loss measuring unit of optical fiber

Publications (2)

Publication Number Publication Date
JPS557653A true JPS557653A (en) 1980-01-19
JPS5712089B2 JPS5712089B2 (en) 1982-03-09

Family

ID=13723610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8062878A Granted JPS557653A (en) 1978-07-03 1978-07-03 Loss measuring unit of optical fiber

Country Status (1)

Country Link
JP (1) JPS557653A (en)

Also Published As

Publication number Publication date
JPS5712089B2 (en) 1982-03-09

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