JPS5483458A - Measuring method of connection loss of optical fibers - Google Patents
Measuring method of connection loss of optical fibersInfo
- Publication number
- JPS5483458A JPS5483458A JP14995577A JP14995577A JPS5483458A JP S5483458 A JPS5483458 A JP S5483458A JP 14995577 A JP14995577 A JP 14995577A JP 14995577 A JP14995577 A JP 14995577A JP S5483458 A JPS5483458 A JP S5483458A
- Authority
- JP
- Japan
- Prior art keywords
- light
- pulse signal
- connection loss
- optical fiber
- fiber
- 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
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
- G01M11/35—Testing of optical devices, constituted by fibre optics or optical waveguides in which light is transversely coupled into or out of the fibre or waveguide, e.g. using integrating spheres
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)
- Light Guides In General And Applications Therefor (AREA)
Abstract
PURPOSE:To measure connection loss at the position where there is a connection point with high accuracy by entering light signal into an optical fiber from the position another from the opening face of the optical fiber existing before the connection part of the optical fibers. CONSTITUTION:When the light pulse signal generated by a light pulse signal generator 21 is condensed by a lens 22 and is entered to an optical fiber 18, the light signal is excited in its core. In this case, the excitation of the light smoetimes occurs in the fiber other than in its core and this becomes a measurement error and therefore this light is removed with a mode filter 24. Rayleigh scattering light is detected with a detection part 23 immedaite before the connecting part 19. This detection light is synchronized to the pulse signal from the light pulse signal generator 21 and is amplified in a lock-in amplifier 25 and is indicated in an indicator 26. This value is let to be M1. Next, the Rayleigh scattering light in the fiber 20 is measured and the value thereof is let to be M2, then the connection loss S is given by S=10 log M1/M2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14995577A JPS5483458A (en) | 1977-12-15 | 1977-12-15 | Measuring method of connection loss of optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14995577A JPS5483458A (en) | 1977-12-15 | 1977-12-15 | Measuring method of connection loss of optical fibers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5483458A true JPS5483458A (en) | 1979-07-03 |
| JPS5648813B2 JPS5648813B2 (en) | 1981-11-18 |
Family
ID=15486240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14995577A Granted JPS5483458A (en) | 1977-12-15 | 1977-12-15 | Measuring method of connection loss of optical fibers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5483458A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543577A2 (en) * | 1991-11-19 | 1993-05-26 | Minnesota Mining And Manufacturing Company | Local loss test set for optical fibre |
| JP2007296381A (en) * | 2007-07-26 | 2007-11-15 | Tomy Co Ltd | Card toys |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60117775U (en) * | 1984-01-17 | 1985-08-09 | 株式会社伊藤裕晤商店 | Tension ribs for table coverings, pillows and mosquito nets, etc. |
| JPS63300706A (en) * | 1987-05-30 | 1988-12-07 | 横山 三千夫 | Unbrella and pulley thereof |
| JPH01256907A (en) * | 1988-04-07 | 1989-10-13 | Koichi Mita | Fitting device for umbrella rib |
-
1977
- 1977-12-15 JP JP14995577A patent/JPS5483458A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543577A2 (en) * | 1991-11-19 | 1993-05-26 | Minnesota Mining And Manufacturing Company | Local loss test set for optical fibre |
| EP0543577A3 (en) * | 1991-11-19 | 1993-06-09 | Minnesota Mining And Manufacturing Company | Local loss test set for optical fibre |
| JP2007296381A (en) * | 2007-07-26 | 2007-11-15 | Tomy Co Ltd | Card toys |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5648813B2 (en) | 1981-11-18 |
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