JPS557653A - Loss measuring unit of optical fiber - Google Patents
Loss measuring unit of optical fiberInfo
- 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
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (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
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) |
-
1978
- 1978-07-03 JP JP8062878A patent/JPS557653A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5712089B2 (en) | 1982-03-09 |
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