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Manufacturing method of high-strength optical fibers

A manufacturing method and high-strength technology, which is applied in the field of optical fibers, can solve the problems that optical fibers cannot meet high strength, and achieve the effects of reducing cracks, reducing optical fiber stress, and prolonging service life

Active Publication Date: 2019-01-01
NANJING WASIN FUJIKURA OPTICAL COMM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the obtained optical fiber still cannot meet the requirements of high strength

Method used

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  • Manufacturing method of high-strength optical fibers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 Aging Treatment Comparative Example

[0017] The G652 and G657 optical fibers are manufactured using the existing wet and wet coating process, and the dynamic fatigue coefficient after being placed at room temperature and the dynamic fatigue coefficient after being placed at high temperature are tested for the qualified optical fiber after drawing (tension screening setting parameter: 17.6). The fatigue coefficients were compared, and the comparison results are shown in Table 1 below.

[0018] Table 1 Comparison of dynamic fatigue coefficients of optical fibers under different conditions

[0019]

[0020] The coating resin types of each sample in the above table are as follows:

[0021] When the optical fiber of sample 1 is coated, DSM DP1-016 (Young's modulus is 0.9MPa) is selected for the inner coating resin, and DSM DS2088 (Young's modulus is 950MPa) is selected for the outer coating resin; the optical fiber of sample 2 When coating, choose BORDEN 1...

Embodiment 2

[0024] Example 2 Coating Resin Selection Comparative Example

[0025] After different coating resins were used in Example 1, each sample obtained after wire drawing was carried out for tension screening: the optical fiber screening tension was set to 17.6N, and the length of broken fiber was not less than 400Km / time. The pass rate of each sample is shown in Table 2 below. Show.

[0026] Table 2 Tension screening comparison of each sample

[0027] sample

[0028] As shown in the table above, sample 2 has the highest pass rate of tension screening, followed by samples 4 and 5. Considering the dynamic fatigue coefficients of the samples in Example 1 comprehensively, sample 5 has the best performance.

Embodiment 3

[0029] Example 3 Coating resin selection combined with effect example of aging treatment

[0030] Wet and wet coating process is always used in the fiber drawing process, and the inner layer coating resin and outer layer coating resin are respectively selected from DSM’s DP1032 resin and DS2042. The pass rate of optical fibers screened by tension is 95%. Put the tension-screened optical fiber in a deuterium gas box, control the deuterium gas concentration at about 1%, and control the temperature in the box at about 70-40°C, place it for 7 hours and 24 hours, test its attenuation respectively, and the attenuation drops by 0.002dB / km.

[0031] In the present invention, by selecting the inner layer resin with better stress and the outer layer resin with better tensile performance, and the resin material can meet the needs of later detection of welding, after the drawn optical fiber is screened by tension, it is aged at a certain temperature The treatment reduces the stress of ...

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Abstract

The invention discloses a manufacturing method of high-strength optical fibers. In the wire-drawing process of the optical fibers, a wet-on-wet coating process is adopted. According to the manufacturing method provided by the invention, after wire-drawing of the optical fibers, the optical fibers are placed in an environment with the temperature of 40-70 DEG C for 7-24 hours to be subjected to aging treatment. Through the aging treatment at certain temperature, the stress of the optical fibers is reduced, cracks are reduced, the tensile strength and reliability of the optical fibers are improved, and the service life of the optical fibers is prolonged.

Description

technical field [0001] The invention belongs to the field of optical fibers, and in particular relates to a method capable of improving the tensile strength and reliability of optical fibers. Background technique [0002] The tensile strength of optical fiber is an important performance of optical fiber transmission. If the fiber is broken, the signal will not be transmitted directly. Therefore, it is an important link to increase the tensile strength of optical fiber to improve the reliability of optical fiber. [0003] Most of the existing processes are improved by improving the optical fiber coating process, such as using a wet and humid double-layer coating process, or by adjusting the process parameters in the drawing process (such as coating temperature, coating pressure control, optical fiber drawing speed, etc.) regulation, cooling gas flow control, etc.). However, the obtained optical fiber still cannot meet the requirement of high strength. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/10C03C25/50C03C25/66
CPCC03B37/10C03C25/50C03C25/66
Inventor 王小泉
Owner NANJING WASIN FUJIKURA OPTICAL COMM LTD
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