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Method of measuring bending performance of optical fiber

A bending performance and measurement method technology, applied in the testing of optical performance, measuring devices, optical instrument testing, etc., can solve the problems of easily soiled products, increased cost, and prolonged working hours, and achieves the effect of simple measurement

Inactive Publication Date: 2012-09-19
SUMITOMO ELECTRIC IND LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, immersing the optical fiber in an index-matching liquid is time-consuming and labor-intensive compared to usual measurement methods, resulting in extended man-hours and increased costs
In addition, additional problems arise: for example, due to the refractive index matching fluid, the product may easily be soiled

Method used

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  • Method of measuring bending performance of optical fiber
  • Method of measuring bending performance of optical fiber
  • Method of measuring bending performance of optical fiber

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Embodiment Construction

[0017] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. These drawings are only used to describe the present invention, not to limit the scope of the present invention. In the drawings, the same reference numerals denote the same elements, so that repeated descriptions may be omitted. The dimensional ratios in the drawings are not always accurate.

[0018] Figure 1A and 1B is a conceptual schematic diagram showing a measurement method of optical fiber bending loss. The optical fiber 1 to be measured has a core and a cladding respectively made of glass, and the periphery of the cladding is covered with a coating made of resin. The measurement method of optical fiber bending loss includes: (1) the first step is to place the optical fiber 1 in a state where there is no bending loss, and measure the The power P of the light emitted from the other end of the fiber 1 0 ( Figure 1A ); (2) In the second step, in...

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Abstract

A method of measuring the bending performance of an optical fiber in a simple manner is provided. Power (P1) of light emitted from one end of the optical fiber when light is incident onto the other end of the optical fiber is measured under conditions where the optical fiber (1) is wound at a constant pitch by one layer on the circumferential side of a mandrel (2) and the overall circumference of the optical fiber (1) thus wound is covered with an index matching sheet (5). The refractive index of the index matching sheet (5) substantially matches with the refractive index of resin of the outermost layer of the optical fiber (1).

Description

technical field [0001] The invention relates to a method for measuring the bending performance of an optical fiber coated with resin. Background technique [0002] In recent years, with the development of FTTH (fiber-to-the-home), the use of optical fibers with low bending loss has become more and more popular. The bending loss of the optical fiber occurs due to the bending of the optical fiber. The measurement method of optical fiber bending loss is specified in ITU-T G.650.1 5.6 "Test methods for the macrobend loss (measurement method of macro bending loss)", in Japanese Patent Application Publication No.H1-203938, Japanese Patent Application Publication No. It is also described in 2002-310850 and Japanese Patent Application Laid-Open No. 2009-229120. According to these documents, bending loss is measured by evaluating the difference between the transmitted power obtained when the fiber is not bent and the transmitted power obtained when the fiber is bent. [0003] In "...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/088
Inventor 中西哲也樽稔树永岛拓志小西达也桑原一也市川真
Owner SUMITOMO ELECTRIC IND LTD