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Large size combined optical fibre perform of polarization maintaining fiber and production method thereof

An optical fiber preform and polarization-maintaining optical fiber technology, which is applied to manufacturing tools, glass manufacturing equipment, glass fiber products, etc., can solve the problems of high stability requirements of fixtures, unsatisfactory symmetry of punched preforms, etc. Improved symmetry and longitudinal consistency, stable and controllable drawing conditions, slow and stable movement

Active Publication Date: 2009-03-25
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, using the method mentioned in the above invention, in the drilling of a large-diameter preform, because the weight of the preform itself is relatively large, and the preform needs to be rotated by 180°, the stability of the clamp is very high, and there are considerable problems in actual operation. Difficulty, making the symmetry of the perforated preform unsatisfactory

Method used

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  • Large size combined optical fibre perform of polarization maintaining fiber and production method thereof
  • Large size combined optical fibre perform of polarization maintaining fiber and production method thereof
  • Large size combined optical fibre perform of polarization maintaining fiber and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The geometric parameters of the combined preform and the length and performance index of the polarization-maintaining optical fiber drawn by using the combined preform are shown in Table 1.

[0057] Table 1: Geometric dimensions of combined preforms and related indicators of drawn optical fibers

[0058]

[0059] Use a perforated preform with a diameter of 30mm, the diameter of the hole is 12mm, and insert a stress rod with a diameter of 10mm in the stress zone into the hole of the preform. After cleaning and drying, the upper tower of the combined optical fiber preform is drawn into a cladding diameter of 80 μm. Polarization-maintaining optical fiber, a total of 35km of qualified polarization-maintaining optical fiber products have been produced. The crosstalk of the panda-type polarization-maintaining optical fiber per kilometer can reach -25dB, and the birefringence of the optical fiber can reach 6×10 -4 ; Draw a polarization maintaining fiber with a cladding diam...

Embodiment 2

[0061] The geometric parameters of the combined preform and the length and performance index of the polarization-maintaining optical fiber drawn by using the combined preform are shown in Table 2.

[0062] Table 2: Geometric dimensions of combined preforms and related indicators of drawn optical fibers

[0063]

[0064]

[0065] Use a perforated preform with a diameter of 40mm, and the diameter of the hole is 13.5mm. Use a stress rod with a diameter of 13mm in the stress zone to insert into the hole of the preform. After cleaning and drying, pull the combined optical fiber preform into a tower with a cladding diameter of 80μm. A total of 65km of qualified polarization-maintaining fiber products have been produced. The crosstalk of the panda-type polarization-maintaining fiber per kilometer reaches -25dB, and the birefringence of the fiber reaches 6×10 -4 ; Pulling a polarization maintaining fiber with a cladding diameter of 125μm can produce a qualified polarization main...

Embodiment 3

[0067] The geometric parameters of the combined preform and the length and performance index of the polarization-maintaining optical fiber drawn using the combined preform are shown in Table 3.

[0068] Table 3: Geometric dimensions of combined preforms and related indicators of drawn optical fibers

[0069]

[0070] Use a perforated preform rod with a diameter of 50 mm, wherein the diameter of the hole is 16 mm, and insert a stress rod with a diameter of 14 mm in the stress zone into the hole of the preform rod. Polarizing optical fiber, a total of 100km of qualified polarization-maintaining optical fiber products have been produced. The crosstalk of the panda-type polarization-maintaining optical fiber per kilometer can reach -25dB, and the birefringence of the optical fiber can reach 6×10 -4 ; Pulling a polarization maintaining fiber with a cladding diameter of 125μm can produce qualified polarization maintaining fiber products with a length of 60km. -4 , all performanc...

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Abstract

The invention relates to a polarization maintaining optical fibre large-size composite optical fibre preform and a preparation technological method, and comprises the optical fibre preform with a fibre core and cladding layers; the areas of the cladding layers of the two sides of the fibre core of the optical fibre perform are provided with two holes which run through lengthways and are parallel to the fibre core; the two holes are provided with stress rods so as to form the composite optical fibre preform; the invention is characterized in that the optical fibre preform has the diameter of 30 to 80mm and the length of 200 to 800mm, the diameter range of the two side holes is 12 to 27mm and the diameter range of the stress area of the stress rod is 10 to 25mm. The polarization maintaining optical fibre large-size composite optical fibre preform and the preparation technological method lead the wire-drawing condition to be stable and controllable, and the drawn polarization maintaining optical fibre has excellent mechanical property and can pass the tension screening of 1 percent, even 2 percent; the preform with large diameter and large length is used for producing the polarization maintaining optical fibre; the wire-drawing length of a single preform reaches to be more than 200km, even more than 100km; and the production efficiency of the optical fibre is high. The drawn optical fibre structure has good symmetry and lengthwise uniformity and is easy to control.

Description

technical field [0001] The invention relates to a large-scale combined optical fiber preform of a polarization-maintaining optical fiber and a manufacturing process thereof, in particular to a large-scale combined optical fiber preform of a panda-type polarization-maintaining optical fiber and a manufacturing method thereof. The invention can be used to manufacture polarization-maintaining optical fibers and single-mode single-polarization optical fibers of various wavelengths, and is used in the fields of optical fiber communication and optical fiber sensing. Background technique [0002] Polarization maintaining fiber is a kind of special fiber. Polarization maintaining fiber, that is, polarization maintaining fiber, is a type of fiber that maintains the linear polarization direction of the transmitted light. Polarization-maintaining optical fiber can be applied in many fields, such as multiplexing coherent communication, fiber optic gyroscope, fiber optic hydrophone, pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/018
CPCC03B37/01231C03B37/01217C03B2203/31
Inventor 汪洪海涂峰童维军
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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