Method for manufacturing glassy state core preform

Abstract

The invention discloses a method for manufacturing cylinder glassy state optical waveguide core preform with low water. The glassy state optical waveguide core is used for preparing optical waveguide fibers. The water content in the glassy state optical waveguide core preform is low enough to make light attenuation at a measurement wavelength of 1380 nm of the optical waveguide fibers manufactured by the glass optical waveguide preform less than about 0.35 dB/km, and preferably less than about 0.31 dB/km. Methods are also disclosed for manufacturing glass preforms used in the manufacture of such a glass optical waveguide preform that combine the vapor axial deposition (VAD) and outside vapor deposition (OVD) techniques.

Description

technical field [0001] The present invention generally relates to the field of optical waveguide optical fibers, in particular to an optical waveguide preform and a method for preparing the optical waveguide preform, and a low water peak optical waveguide optical fiber is prepared by the method for preparing the optical waveguide preform. Background technique [0002] A major goal of the telecommunications industry is to transmit greater amounts of information over longer distances in less time. The usage of telecommunication systems by users and system resources has gradually increased significantly. This has led to a need for increased bandwidth in media used to carry information over long distances, especially optical waveguide fibers included in telecommunication cables. [0003] The bandwidth of an optical waveguide fiber is related to various factors, such as the attenuation of the fiber at the transmission wavelength. Impurities present in the light-guiding region o...

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Problems solved by technology

Impurities present in the light-guiding region of the fiber will increase the attenuation of the fiber due to the absorption of transmitted light

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