Silica Optical Fiber
Silica Fiber is an optical fiber in which silicon dioxide (SiO2) is the main raw material, and the refractive index distribution of the core and cladding is controlled according to different doping amounts. Quartz (glass) series optical fibers, with low power consumption and broadband characteristics, have been widely used in cable television and communication systems.
The advantage of quartz glass optical fiber is low loss. When the light wavelength is 1.0～1.7μm (around 1.4μm), the loss is only 1dB/km, and the lowest at 1.55μm is only 0.2dB/km.
Fluorine Doped Fiber is one of the typical products of silica fiber. Generally, in the 1.3μm waveband communication optical fiber, the dopant controlling the core is germanium dioxide (GeO2), and the cladding is made of SiO2. However, most of the cores of fluorine-connected fibers use SiO2, but fluorine is doped in the cladding. Because Rayleigh scattering loss is a phenomenon of light scattering caused by changes in refractive index. Therefore, it is desirable to form dopants of refractive index fluctuation factors, and less is better. The main effect of fluorine is to reduce the refractive index of SIO2. Therefore, it is often used for the doping of the cladding.
Compared with optical fibers of other raw materials, quartz fiber also has a broad spectrum of light transmission from ultraviolet light to near-infrared light. In addition to communication purposes, it can also be used in light guide and image transmission fields.
As the working wavelength of the quartz series optical fiber developed in the field of optical communication, although it is used in a shorter transmission distance, it can only be used in 2μm. For this reason, it can work in the field of longer infrared wavelengths, and the developed optical fiber is called infrared optical fiber. Infrared Optical Fiber (Infrared Optical Fiber) is mainly used for light energy transmission. For example, there are: temperature measurement, thermal image transmission, laser scalpel medical treatment, thermal energy processing, etc. The penetration rate is still low.