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Optical fiber coil and production method therefor

Inactive Publication Date: 2008-03-13
TOMOEGAWA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015] The present invention was completed in consideration of the above problems, and objects thereof are to provide an optical fiber coil and a production method therefor, in which it is difficult for the optical transmission loss due to stress or temperature change to occur, and in which the cost is low.
[0023] According to the present invention, an optical fiber coil and a production method therefor can be provided in which it is difficult for the optical transmission loss due to stress or temperature change to occur, and in which the cost is low.
[0024] That is, by using an optical fiber ribbon in which plural single optical fibers are arranged in parallel in advance and disposing a covering portion integrally covering them thereon, the single optical fibers can be prevented from being exposed and the optical transmission loss due to stress or temperature change can be decreased. In addition, the adhesive used can also be minimized or be omitted, so that a process for applying the adhesive is minimized. Therefore, the optical fiber coil can be simply produced, and the cost can be less than in conventional techniques.

Problems solved by technology

However, they are disadvantageous in that the optical fiber is bulky when the desired length thereof is long.
However, there are problems in the above conventional production method for an optical fiber coil.
That is, since the single optical fibers are exposed to the surface of the fiber coil, optical transmission loss easily occurs due to slight stress or temperature change.
As a result, in the case in which the single optical fiber is accurately wound in a coiled state in order to avoid the above loss, it is expensive because of the need for adjustment thereof, or the like.

Method used

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  • Optical fiber coil and production method therefor
  • Optical fiber coil and production method therefor
  • Optical fiber coil and production method therefor

Examples

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Effect test

example 1

[0079] As single optical fiber 1, eight single optical fiber cables having a length of 50 meters (quartz single-mode optical fiber, outer diameter 0.25 mm, produced by Furukawa Electric Co., Ltd.) were used.

[0080] Room-temperature-setting silicone rubber (trade name: TSE392, hardness of 26, tensile strength of 16 kgf / cm2, produced by GE Toshiba Silicones, Ltd.) before curing, which was the material of covering portion S, was applied to the surface of a flat base. The eight single optical fiber cables 1 were arranged on the applied silicone rubber in parallel, and room-temperature-setting silicone rubber was further applied on the single optical fiber cables 1. Then, the applied material was molded using a molding jig and was cured by drying, and thereby an optical fiber ribbon 11 was produced. The thickness of the covering portion S was 10 μm.

[0081] Next, the optical fiber ribbon 11 was wound in a coiled state by a winding machine.

[0082] The winding machine contains a cylindrical...

example 2

[0085] With respect to the optical fiber coil of Example 1, a coating portion in which the optical fiber coil was covered at a portion other than at both ends of the optical fiber ribbon 11 was formed.

[0086] Specifically, the produced optical fiber coil of Example 1 was dipped into silicone rubber (trade name: TSE3250, produced by GE Toshiba Silicones, Ltd.) other than both ends of the optical fiber ribbon 11, was pulled up, and was dried and cured at 100° C. for 2 hours, and thereby the coating portion 7 was formed.

[0087] As described above, the optical fiber coil of Example 2 was produced.

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Abstract

An optical fiber coil and a production method therefor reduce the likelihood of optical transmission loss due to stress or temperature changes at low cost. Plural single optical fibers are arranged in parallel and are integrally covered with a covering portion so as to form an optical fiber ribbon, and the optical fiber ribbon is wound into a coiled state.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an optical fiber coil which can be used in a fiber-optic gyroscope, sensor, optical amplifier, laser, dispersion compensator, nonlinear optical device, delay circuit, dummy circuit, other parts employing long optical fibers, extra long handling tool, etc., and which can be used to conserve space and have low tension, and the present invention also relates to a production method for the optical fiber coil. [0003] 2. Description of Related Art [0004] Optical fiber type devices that employ optical fibers therein are widely employed in, for example, sensors. In addition, such optical fiber type devices have attracted attention for use in optical fiber amplifiers that are doped with erbium, thulium, praseodymium, etc., dispersion compensators using dispersion-compensated optical fibers, and nonlinear optical devices. [0005] It is known that optical fiber type devices are superior devices,...

Claims

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Application Information

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IPC IPC(8): G02B6/44
CPCG01C19/722Y10T29/49885G02B6/4457G02B6/46
Inventor SUZUKI, MASAYOSHIMATSUNAGA, TADAOFURUE, TOMOKISUKEGAWA, KEN
Owner TOMOEGAWA CO LTD