Surface-modified metal-coated optical fiber and preparation method and preparation system thereof

Abstract

The invention discloses a surface-modified metal-coated optical fiber and a preparation method and a preparation system thereof. The surface-modified metal-coated optical fiber sequentially comprisesa bare optical fiber, a middle modified layer and a metal coating from inside to outside. The bare optical fiber comprises a fiber core and an optical fiber cladding and has an optical waveguide function; the middle modified layer is a coating formed by silica sol particles, and the particle size of the silica sol particles ranges from 80 nm to 120 nm. According to the invention, silica sol particles are introduced between the bare optical fiber and the metal coating, so that molten metal can be better attached to the outer surface of the bare optical fiber; and meanwhile, the formed middle modified layer has a loose structure, and can effectively buffer the pressure stress generated by mismatching of the thermal expansion coefficients of the metal coating and the bare optical fiber, thereby achieving the effect of reducing the transmission loss of the metal-coated optical fiber.

Description

technical field [0001] The invention relates to the field of optical fiber preparation, in particular to a surface-modified metal-coated optical fiber, a preparation method and a preparation system thereof. Background technique [0002] At present, silica optical fiber is mainly used in the fields of information, sensing technology, and laser energy transmission. It is a medium for transmitting optical signals. Its main structure is two layers of cylindrical media inside and outside, that is, the core layer and the outer cladding layer. [0003] The bare surface of optical fiber has high surface free energy, which will spontaneously adsorb water molecules and O in the environment. 2 and other substances to reduce the surface energy, the water molecules will hydrolyze with the [-Si-O-Si-] bond on the surface of the bare fiber to form [SiO - ] and [-SiO-OH] and other broken bonds, and then destroy the near-range ordered structure of the fiber glass, and gradually form a large...

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Problems solved by technology

[0006] The object of the present invention is to provide a surface-modified metal-coated optical fiber and its preparation method and preparation system, which are used to solve the poor wettability of the metal coating and the bare optical fiber in the prior art, and the metal coating and Bare optical fiber will cause large transmission loss due to thermal expansion coefficient mismatch

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