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Low-attenuation high temperature resistance optical fiber

A technology with high temperature resistance and low attenuation, applied in the direction of cladding optical fiber, multi-layer core/cladding optical fiber, etc., can solve the problems of research on the attenuation performance of non-fiber, and achieve the effect of improving mechanical performance, low attenuation, and easy production.

Active Publication Date: 2013-12-25
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 202133795 U discloses a self-compensating high-temperature-resistant optical fiber, which does not describe the high-temperature-resistant characteristics of the negative thermal expansion coating, and does not conduct detailed research on the attenuation performance of the optical fiber

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] Core layer, cladding layer and inner and outer coating structure such as figure 1 As shown, a single-mode structure 9 / 125 μm quartz optical fiber is produced, and the inner and outer coatings are respectively modified silicone rubber coating layer and polyimide coating layer, wherein the modified silicone rubber coating is organic silicon Modified silicone rubber OF-182 (purchased from Japan Shin-Etsu Coatings Co., Ltd.), after curing, its elastic modulus is 2.0 MPa, and the working environment temperature range is -70~280 °C; the polyimide coating described is ZKPI- 306H polyimide coating is a high-purity polyimide precursor-polyamic acid solution, which is directly converted into a polyimide film after thermal curing, and the tensile strength after curing is greater than or equal to 150MPa. The elastic modulus is greater than or equal to 3.0GPa, the glass transition temperature is greater than or equal to 400°C, the outer diameter of the inner coating is 165μm, the o...

Embodiment 2

[0022] Core, cladding and coating structures such as figure 1 As shown, the multimode structure 50 / 125μm quartz optical fiber is made, and the inner and outer coatings are respectively modified silicone rubber coating layer and polyimide coating layer, wherein the modified silicone rubber coating is organic silicon Modified silicone rubber OF-180, the curing condition is 150°C heat curing for 30 minutes, the elastic modulus after curing is 1.0MPa, and the working environment temperature range is -70~300°C; the polyimide coating described is ZKPI -306I polyimide coating, the curing condition is 200 ° C for 40 minutes, the elastic modulus after curing is 3.0 GPa, the temperature resistance level of the coating is -65 ° C ~ +300 ° C, the outer diameter of the inner coating is 162 μm, The outer diameter of the coating is 202 μm. The optical fiber has an attenuation value of 2.23dB / km at 850nm, and an attenuation value of 0.42dB / km at 1300nm, and the length of the optical fiber se...

Embodiment 3

[0024] Core, cladding and coating structures such as figure 1 As shown, the multimode structure 62.5 / 125μm quartz optical fiber is made, and the inner and outer coatings are respectively modified silicone rubber coating layer and polyimide coating layer, wherein the modified silicone rubber coating is organic silicon Modified silicone rubber OF-101, the curing condition is 150 ° C for 30 minutes, the elastic modulus after curing is 1.8 MPa, and the working environment temperature range is -70 ~ 300 ° C; the polyimide coating is ZKPI -306II polyimide coating, the curing condition is 200 ° C for 35 minutes, the elastic modulus after curing is 2.8 GPa, the temperature resistance level of the coating is -65 ° C ~ +300 ° C, the outer diameter of the inner coating is 164 μ m, The outer diameter of the coating is 199 μm. The attenuation value of the optical fiber at 850nm is 2.62dB / km, the attenuation value at 1300nm is 0.51dB / km, and the length of the optical fiber section is great...

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Abstract

The invention relates to a low-attenuation high temperature resistance optical fiber which comprises a silica fiber. An inner coating and an outer coating wraps the outer surface of the silica fiber from inside to outside in sequence. The low-attenuation high temperature resistance optical fiber is characterized in that the inner coating is made of modified silicone rubber coating materials, the outer coating is made of polyimide coating materials, the inner coating and the outer coating are both formed through thermal curing, and the thickness of the radial single edge of each coating is 16-25microns. According the low-attenuation high temperature resistance optical fiber, the inner coating is small in modulus, high in tensile strength and capable of playing a good buffering role, effectively protecting the silica fiber, improving the mechanical properties of the silicon fiber and optimizing the transmission characteristics of the optical fiber; by means of the recombination of the inner high temperature resistance coating and the outer high-temperature resistance coating, the silica fiber is made to be work normally and maintain low attenuation in environments with 300DEG C high temperature, and thus the application characteristics of the silicon fiber are improved greatly, the silicon fiber can be applied to high-temperature severe working environments, the long-period using temperature reaches 300DEG C, and thus the application field of the silica fiber is expanded; the low-attenuation high temperature resistance optical fiber is simple in coating structure and easy and convenient to manufacture.

Description

technical field [0001] The invention relates to a low-attenuation and high-temperature-resistant optical fiber, which belongs to the technical field of optical fiber communication and sensing in high-temperature and severe special environments. Background technique [0002] At present, with the rapid development of special optical fiber technology, its application range has been extended to various high-temperature and harsh environmental systems, and the requirements for optical and mechanical properties of optical fibers are also increasing. It still maintains good optical properties under the conditions of use, and plays a better role in aerospace, military, equipment and other fields. [0003] The coating material on the surface of the silica fiber has a great influence on the performance of the fiber, and the operating temperature of the silica fiber is mainly determined by the properties of the coating material. The usual manufacturing method of high temperature resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036C03C25/50
Inventor 赵亮汪松范冰松
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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