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High-temperature oil-proof high numerical aperture optical fiber and preparation method thereof

A numerical aperture and oil-resistant technology, used in cladding optical fibers, glass optical fibers, glass manufacturing equipment, etc., can solve the problems that temperature-measuring optical fibers cannot meet large numerical values, high temperature resistance, oil resistance, and cannot meet the temperature measurement requirements of transformer windings at the same time. , to achieve the effect of blocking corrosion, stable performance and enhancing high temperature resistance

Pending Publication Date: 2019-11-08
西安和其光电科技股份有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing temperature-measuring optical fiber cannot meet the requirements of high-value, high-temperature resistance, and oil resistance at the same time, resulting in that it cannot meet the temperature measurement requirements of transformer windings in the power industry, and provide a high-temperature oil-resistant large numerical aperture optical fiber and its preparation method

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  • High-temperature oil-proof high numerical aperture optical fiber and preparation method thereof

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Embodiment Construction

[0021] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] The structure of traditional optical fiber is a three-layer structure, namely core layer, cladding layer and coating layer, and the numerical aperture is usually NA=0.22. Polyimide coating is usually used for high temperature resistant optical fiber coating. In order to improve the coupling efficiency of optical fiber coupling and increase the numerical aperture of the optical fiber, the present invention proposes a two-layer optical fiber preparation scheme, coating one or two layers of high-temperature-resistant new low-refraction coating on the pure silica core layer, and the numerical aperture can be increased. As large as NA=0.46. In addition, in order to meet the oil resistance performance of transformer temperature measurement in the power industry, a PFA oil-resistant sheath is added to the outside of the...

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Abstract

The invention relates to a temperature measurement optical fiber, in particular to a high-temperature oil-proof high numerical aperture optical fiber and a preparation method thereof, and mainly solves the problem that an existing temperature measurement optical fiber can not simultaneously meet the requirements of high numerical values, high temperature resistance and oil resistance so as to cause that the existing temperature measurement optical fiber can not meet the temperature measurement use requirements of the transformer winding of the electric power industry. The high-temperature oil-proof high numerical aperture optical fiber comprises a core layer, a coating layer and a protection layer, wherein the core layer, the coating layer and the protection layer are arranged in sequencefrom inside to outside; the core layer is a pure quartz bare fiber; the coating layer comprises one or two high-temperature-resistant coatings; and the protection layer is a high-temperature oil-proofprotection layer.

Description

technical field [0001] The invention relates to a temperature-measuring optical fiber, in particular to a high-temperature oil-resistant large numerical aperture optical fiber and a preparation method thereof. Background technique [0002] In the temperature measurement of transformer windings in the power industry, optical fiber temperature measurement has gradually replaced the traditional platinum resistance temperature measurement with its unique advantages such as high precision, strong anti-interference ability, and small installation size. However, due to the harsh installation environment on site, the thick optical fiber needs to be bent and installed many times, which makes it easy to break, which will directly lead to the failure of the temperature measurement function of the instrument. The flexibility of the fiber is inversely proportional to the fourth power of the core diameter. The smaller the core diameter of the fiber, the less energy of the excitation light...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02C03B37/025C03C25/1065C03C25/105
CPCG02B6/02395C03B37/025C03C25/1065
Inventor 张文松单娟
Owner 西安和其光电科技股份有限公司
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