Method of preparing photosensitivity multipolymer doped with optical-fibre preformed bar and the fiber core material

Abstract

The invention discloses a manufacturing method for photosensitive polymer optical fiber preform rod and the core material. Under the high pressure, Teflon rope technology is used to manufacture single-mode or few-mode functional polymer optical fiber preform rod and optical fiber by two-step method. Main components of core material are polymethyl methacrylate pmma, additive with higher refractive index, methacrylic acid ester and copolymer of photosensitive monomer, methyl vinyl ketone, azo monomer, monomer complex with rare earth and methyl methacrylate pmma. As the functional optical fiber is manufactured by doping copolymer, the upper limit of doping concentration of photosensitive matter is improved greatly while the diffusion of small molecule in copolymerization process is avoided. It is easier to control the fiber size and the refraction of fiber core.

Description

Technical field: [0001] The invention belongs to the technical field of preparation method and fiber core material of polymer optical fiber preform, and in particular relates to a preparation method of functionalized few-mode and single-mode step-type polymer optical fiber preform, optical fiber and fiber core material. Background technique: [0002] It is mentioned in Chinese patent CN200410014392.3 that there are currently four main manufacturing methods for polymer optical fibers: prefabricated rod drawing method, batch extrusion method, continuous extrusion method and melt spinning method, wherein batch extrusion method, continuous extrusion method The exit method and the melt spinning method are mainly used to manufacture step-type polymer optical fibers; and both gradient-type and step-type polymer optical fibers can be manufactured by preform drawing method. In the monomer bulk polymerization method, in order to avoid the auto-acceleration effect of bulk polymerizatio...

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Problems solved by technology

However, the use of small molecular photosensitive substances to fill the core will cause the monomer to re-swell the cladding, and the diffusion of the doped dye will be serious, the core size will be larger than predicted, and the core refractive index will be reduced.

[0006] "International Optical Engineering Conference Proceedings" (SPIE, Volume 3623, 1999, 206-214) mentioned that in inorganic quartz materials, the dissolution of rare earth ions is extremely limited and at a lower concentration (about 0.01%-wt) The concentration quenching phenomenon will occur, and the rare earth chelate can be well compatible with the polymer matrix because the rare earth ion is surrounded by organic ligands, so it has a higher doping concentration (about 1%-wt) , without concentration quenching, but the value of concentration quenching is still not high enough

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