Summary:The communication industry is an "information industry highway". The quartz optical fiber made of high-purity quartz is used as a high-speed intelligent "pipe"
The communication industry is an "information industry highway". The quartz optical fiber made of high-purity quartz is used as a high-speed intelligent "pipe" for information, which will provide a basic guarantee for Industry 4.0 and Internet +. Quartz optical fiber is widely used in the field of communication, microelectronics and optoelectronic devices. Compared with cable or copper wire as the transmission medium, quartz optical fiber has stronger anti-electromagnetic interference ability, anti-corrosion ability, better frequency bandwidth and capacity, Less resource consumption features.
According to different materials, silica glass fiber can be divided into pure silica glass fiber and doped silica fiber. Doped silica fiber mainly includes rare earth doped silica fiber, fluorine doped silica fiber and nitrogen doped silica fiber, etc. Rare earth doped fiber has good laser performance, fluorine doped silica fiber and nitrogen doped silica fiber have radiation resistance, by adjusting the fiber The structural design, refractive index distribution, doping process, pre-irradiation treatment, and post-irradiation treatment can improve its anti-space radiation performance.
Therefore, optical fibers are not only used in traditional communication fields, but also in special high-energy radiation environments, such as internal detection of fusion reactors, amplifiers for highly distributed data networks in aerospace, broadband super light sources for fiber optic gyroscopes, and fission reactors. The signal of the fiber laser, etc. The performance of silica fiber is affected by the intrinsic defects, doping defects and morphology damage of the fiber material, among which intrinsic point defects such as oxygen vacancy center (ODC), peroxide chain defect (POL), color center, non-bridge oxygen defect Center (NBOHC) and peroxygen radical (POR), etc., doping defects such as the introduction of metal elements or non-metallic H and F elements in the material, and morphology damage are surface defects such as microcracks.
Intrinsic defects are related to temperature, doping defects are related to impurities, and the absorption loss caused by impurities will lead to large transmission loss and low transmission efficiency. Therefore, improving the purity of the silica fiber material can improve its transmission efficiency. In addition, the surface coating treatment of optical fibers can greatly improve the optical properties, mechanical properties and corrosion resistance of silica optical fibers.
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