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Method and device for measuring hole diameter of optical fiber with hole, and method and device for manufacturing optical fiber with hole

A measuring method and a manufacturing method technology, which can be applied to measurement devices, optical devices, testing optical fiber/optical waveguide equipment, etc., can solve problems such as the decline of optical fiber productivity, and achieve the effect of reducing deviation and ensuring optical characteristics.

Active Publication Date: 2011-06-22
FUJIKURA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the productivity of optical fibers decreases because bending needs to be applied
In addition, it is also a problem that it can only be applied to optical fibers with voids whose bending loss is highly dependent on the void diameter.

Method used

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  • Method and device for measuring hole diameter of optical fiber with hole, and method and device for manufacturing optical fiber with hole
  • Method and device for measuring hole diameter of optical fiber with hole, and method and device for manufacturing optical fiber with hole
  • Method and device for measuring hole diameter of optical fiber with hole, and method and device for manufacturing optical fiber with hole

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Experimental program
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no. 1 approach

[0060] (Equipment for Measuring Hole Diameter of Optical Fiber with Holes and Manufacturing Equipment for Optical Fibers with Holes)

[0061] Hereinafter, the apparatus for measuring the diameter of a void in an optical fiber with a void and the apparatus for manufacturing an optical fiber with a void according to a first embodiment of the present invention will be described in detail with reference to the drawings. figure 1 It is a schematic configuration diagram showing a hole diameter measuring device 30A ( 30 ) of an optical fiber with a hole (hereinafter simply referred to as a hole diameter measuring device) according to the first embodiment of the present invention. figure 2 It is a schematic configuration diagram showing an optical fiber manufacturing apparatus 1 with holes (hereinafter simply referred to as an optical fiber manufacturing apparatus) according to an embodiment of the present invention. The optical fiber manufacturing apparatus 1 of this embodiment has...

no. 2 approach

[0112] Figure 9C It is a graph showing an example of a scattering intensity pattern obtained by the method of measuring the hole diameter of an optical fiber with holes according to the second embodiment of the present invention.

[0113] The method of measuring the void diameter of the present embodiment differs from the method of measuring the void diameter of the first embodiment in that the scattering intensity pattern obtained from an optical fiber with voids and the scattering intensity pattern obtained from an optical fiber without voids are used. Calculate the width W of the central dark part from the difference spectrum.

[0114] In addition, when manufacturing an optical fiber with a hole, it is the same as the above-mentioned first embodiment except that the width W of the central dark portion is obtained using the difference spectrum. At this time, in the calculation unit 34 of the measuring device 30 of the void diameter, programming is performed so as to obtain...

no. 3 approach

[0120] Figure 10 It is a figure which schematically shows the measurement apparatus 30B (30) of the pore diameter used for the measurement method of the pore diameter which concerns on the 3rd embodiment of this invention. The pore diameter measuring device 30B of this embodiment differs from the first embodiment in that a plurality of irradiation devices 31 ( 31A, 31B) and detection units 32 ( 32A, 32B) are provided. These detection units 32A and 32B are connected to the same signal processing unit 33 . In the illustrated example, a case where two irradiation devices 31 and two detection units 32 are respectively provided was shown, but the number is not particularly limited to this number.

[0121] In the method for measuring the pore diameter (the pore diameter measuring device 30A) of the first embodiment described above, the width W of the central dark portion of the scattering intensity pattern 43 changes depending on the direction in which the parallel light ray 37 is...

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Abstract

The invention provides a method and device for measuring hole diameter of optical fiber with hole and a method and device for measuring optical fiber with hole. The method for measuring the hole diameter of an optical fiber with holes, which measures the hole diameter of an optical fiber bare wire when the optical fiber bare wire with holes is manufactured by heating, melting, and wire-drawing an optical fiber preform with holes. The method comprises a step for continuously irradiating parallel light beams to the optical fiber bare wire with holes from the side of the optical fiber bare wire with holes, which has been obtained by the wire-drawing; a step in which a detection section continuously detects the forward scattered light generated by the irradiation of the parallel light beams; and a step for calculating the hole diameter using the correlation between the scattering intensity pattern of the detected forward scattered light and the hole diameter.

Description

technical field [0001] The present invention relates to a method and device for measuring the hole diameter of an optical fiber with a hole in which a plurality of holes are formed in silica glass constituting the optical fiber, and a method and device for manufacturing an optical fiber with a hole using the method and device. [0002] This application claims priority based on Application No. 2009-094851 filed in Japan on April 9, 2009, the contents of which are incorporated herein by reference. Background technique [0003] The optical fiber with holes refers to an optical fiber in which a plurality of holes are formed in the silica glass constituting the optical fiber along the length direction of the optical fiber. Such an optical fiber is called a Photonic Crystal Fiber (PCF for short). The optical fiber with holes has optical characteristics that cannot be realized in existing optical fibers due to the existence of holes. For example, in the optical fiber with holes, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/00C03B37/025G01B11/10G02B6/00G02B6/032
CPCC03B2203/14C03B2203/42C03B37/0253G01M11/37G02B6/02366Y02P40/57
Inventor 石田格江森滋畔蒜富夫
Owner FUJIKURA LTD
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