Bend-insensitive radiation-resistant single-mode fiber

Abstract

The invention discloses a bend-insensitive radiation-resistant single-mode fiber and relates to the field of a single-mode fiber. The single-mode fiber comprises a core layer, an inner wrapping layer and an outer wrapping layer, which are arranged in sequence from the inside out. The core layer, the inner wrapping layer and the outer wrapping layer are made of quartz material. The inner wrapping layer comprises a first fluorine-doped inner wrapping layer and a second fluorine-doped inner wrapping layer arranged in sequence from the inside out. The core layer and the first fluorine-doped inner wrapping layer are germanium-undoped, and other metal impurities and phosphorus concentration are lower than 0.1 ppm; in mass percent, the doped fluorine content in the core layer is 0-0.45%, and chlorine content is 0.01%-0.10 %; fluorine content in the first fluorine-doped inner wrapping layer is 1.00%-1.55%; and the fluorine content in the second fluorine-doped inner wrapping layer is 3.03%-5.00%. Compared with an existing radiation-resistant single-mode fiber, additional loss of the single-mode fiber under a bending state is greatly reduced, and bending-resistant performance thereof is better, that is, the single-mode fiber is insensitive to bend; and meanwhile, the radiation-resistant capability of the single-mode fiber is better.

Description

technical field [0001] The invention relates to the field of single-mode optical fibers, in particular to a bending-insensitive radiation-resistant single-mode optical fiber. Background technique [0002] In recent years, more and more optical fibers are used in aerospace and nuclear power fields for data transmission and optical fiber sensing, but there is a large amount of ionizing radiation in the above-mentioned environment, and ionizing radiation will greatly increase the additional loss of optical fibers and reduce the service life of optical fibers. Therefore, the aerospace field and the nuclear power field need to use radiation-resistant optical fibers. [0003] Existing radiation-resistant optical fibers are mainly divided into three categories, namely, multimode optical fibers with a core diameter of 50 microns, multimode optical fibers with a core diameter of 62.5 microns, and single-mode optical fibers. The waveguide structure of the existing radiation-resistant...

AI Technical Summary

Problems solved by technology

The waveguide structure of the existing radiation-resistant single-mode fiber does not have the ability to resist bending, so it cannot be applied under the condition of extremely small bending radius, for example, it is applied to small optical devices

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