A kind of composite optical fiber and preparation method thereof

Abstract

The invention discloses a composite material optical fiber and a preparation method thereof. The composite material optical fiber is composed of one of metal oxide glass and compound glass and a polymer material, and comprises a metal oxide fiber core or a compound fiber core. , The polymer material filler filled between the metal oxide fiber core or the compound fiber core; wherein, the refractive index of the metal oxide glass and the compound glass are higher than the refractive index of the polymer material, and the metal oxide glass The glass and compound glass do not crystallize in the molten state; the advantages are that the preparation difficulty is low, the cost is low, the effective transmission distance is long, the flexibility is good, and the toughness is good.

Description

technical field [0001] The invention relates to an optical fiber and a preparation technology thereof, in particular to a composite material optical fiber and a preparation method thereof. Background technique [0002] Optical fiber is a type of optical fiber that can transmit light waves in different wavelengths. Light waves can contain information, energy, etc., so according to the application purpose of the transmitted light waves, optical fibers can be divided into the following categories: communication fibers, energy transmission fibers, and so on. These different types of fibers are based on different optical principles and fiber structures and achieve different functions. [0003] Multi-core optical fiber is a special optical fiber that improves optical fiber communication capacity based on space division multiplexing. When the core density of the multi-core fiber increases to thousands or tens of thousands or more, each core of this ultra-multi-core fiber can tran...

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Problems solved by technology

[0005] The basic material of the above-mentioned multi-core optical fiber or the prepared multi-core optical fiber is quartz material, but the super multi-core optical fiber of quartz material has the following problems: (1) The melting point of the quartz material exceeds 2000 ° C, resulting in the ultra-multi-core of the quartz material The preparation, processing, and molding of optical fibers are difficult; (2) The quartz material needs to be doped with other elements to change the refractive index, including many rare earth elements, resulting in high cost; (3) After the quartz material is doped, it cannot The range changes the refractive index, so it is impossible to achieve a large core-clad refractive index difference, so the general optical fiber is a weakly guiding optical fiber, and the preparation method and material of the weakly guiding optical fiber are not suitable for preparing super multi-core optical fibers with this function; (4) The lower refractive index difference between the core and the cladding leads to the obvious crosstalk between the cores in the super multi-core fiber, and it is impossible to transmit effective signals over a long distance; (5) In order to ensure a low crosstalk between the cores, it is necessary to ensure that the cores Therefore, the overall size of the ultra-multicore optical fiber is large, or it cannot be prepared into an ultra-multicore optical fiber, and can only be used as a fiber bundle; (6) the ultra-multicore optical fiber of quartz material is hard, brittle and easy to break. Further protection is required by the coating layer, which increases the application volume and the difficulty of preparation

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