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Polarized wave holding optical fiber, and method of producing the same

A polarization-maintaining optical fiber and manufacturing method technology, applied in the direction of polarized optical fiber, cladding optical fiber, manufacturing tools, etc., can solve the problems of loss of polarization characteristics, end insertion, change, etc.

Inactive Publication Date: 2005-07-13
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the outer circumference of the cladding region of the polarization-maintaining optical fiber manufactured by the above-mentioned conventional technology cannot be formed into a perfect circle, and a non-circular shape occurs.
In this way, if the outer circumference of the cladding region of the polarization-maintaining fiber is non-circular, when the end of the polarization-maintaining fiber needs to be connected to an optical connector, it will be impossible to insert the end of the polarization-maintaining fiber into the ferrule of the optical connector.
In addition, if such a polarization-maintaining fiber is connected to another polarization-maintaining fiber, a loss due to the off-axis of the core or a change in polarization characteristics due to the off-axis of the core may also occur.

Method used

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  • Polarized wave holding optical fiber, and method of producing the same
  • Polarized wave holding optical fiber, and method of producing the same
  • Polarized wave holding optical fiber, and method of producing the same

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Embodiment Construction

[0028] Embodiments of the present invention will be described in detail below with reference to the drawings. Here, in the description of the drawings, the same reference numerals are attached to the same elements, and overlapping descriptions are omitted.

[0029] First, the reason why the outer periphery of the cladding region of a polarization-maintaining optical fiber manufactured by a conventional manufacturing method becomes non-circular will be described based on the content considered by the applicant of the present patent. The reason why the outer periphery of the cladding region of the polarization-maintaining fiber becomes non-circular is considered to be as follows. When the stress imparting portion is inserted into the hole of the intermediate body, there is a slight gap between the inner wall surface of the hole and the outer wall surface of the stress imparting portion. That is, due to the existence of such a gap, even if the outer periphery of the cladding por...

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Abstract

Provided are polarization maintaining optical fibers and manufacturing methods thereof. Based on the intermediate body in which the clad portion (22) is formed on the outer periphery of the core portion (21), a pair of hole portions (23) are provided in the clad portion (22) so as to sandwich the core portion (21) parallel to the z-axis. , 24), making the intermediate (20). In this intermediate body (20), the width (Ry) in the y-axis direction is smaller than the width (Rx) in the x-axis direction. And insert the columnar stress imparting portion (33) in the hole portion (23) of the intermediate body (20), insert the columnar stress imparting portion (34) in the hole portion (24) to make a blank (40), and draw it while drawing. This blank was integrated to manufacture a polarization-maintaining optical fiber.

Description

technical field [0001] The present invention relates to a polarization-maintaining optical fiber having a core region sandwiched between a cladding region and a pair of stress-imparting regions, and a method of manufacturing such a polarization-maintaining optical fiber. Background technique [0002] A general polarization-maintaining fiber has a core region sandwiched between a cladding region and a pair of stress-imparting regions. Since the polarization-maintaining optical fiber produced in this way has different residual stresses in the first direction connecting the respective centers of a pair of stress-imparting regions and the second direction perpendicular to it, it has birefringence and can maintain light transmits light in the polarized state. [0003] An example of a conventional method of manufacturing such a polarization-maintaining optical fiber is as follows. After adding GeO by 2 A cladding part made of quartz glass is formed on the outer periphery of a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012G02B6/024G02B6/10
CPCC03B37/01217C03B2203/12C03B2203/302C03B2203/31G02B6/024G02B6/105
Inventor 冈崎岩土屋一郎石川真二吉田元秀春名彻也相马一之
Owner SUMITOMO ELECTRIC IND LTD