Silica has no electrical conductivity, why can it still be used to make optical fibers?

The manufacture of optical fibers is based on the total reflection of light by silica crystals, not by electrical conductivity.

The optical fiber is a transparent glass fiber filament, with a diameter of only about 1 100 m. It is composed of two layers, the inner core and the outer coat, the refractive index of the inner core is greater than the refractive index of the outer coat, and the light enters from one end, and is emitted from the other end after multiple total reflections at the interface between the inner core and the outer coat.

Optical fibers are mixtures and are amorphous. At present, the main component of optical fibers is silica.

Silica is also known as silica and has the chemical formula SIO. There are two types of silica in nature: crystalline silica and amorphous silica.

The main component of sand is silica.

Crystalline silica is divided into three types: quartz, lemostomatite and cristobalite due to different crystal structures. Pure quartz is a colorless crystal, and a large and transparent prismatic quartz is called a crystal. If the crystal containing trace impurities has different colors, there are amethyst, citrine, etc.

Ordinary sand is fine quartz crystals, with yellow sand (more iron impurities) and white sand (less impurities, purer). In the silica crystal, the 4 valence electrons of the silicon atom and the 4 oxygen atoms form 4 covalent bonds, the silicon atom is located in the center of the regular tetrahedron, and the 4 oxygen atoms are located on the 4 apex angles of the regular tetrahedron. Silica is an atomic crystal.

Silica is widely found in nature and together with other minerals make up rocks. Natural silica is called silica, which accounts for about 12% of the earth's crustal mass, and its existence is in two forms: crystalline and amorphous. Quartz crystals are crystalline silica with different crystal forms and colors.

The colorless and transparent crystals in quartz are what are commonly referred to as crystals. The ones that have colored rings, bands, or layers are called agate (which contains impurities).

Silicon dioxide. Also known as silica, the chemical formula SIO. There are two types of silica in nature: crystalline silica and amorphous silica. The manufacture of optical fibers is based on the total reflection of light by silica crystals.

It is not to use electrical conductivity.

The optical fiber is a transparent glass fiber filament, with a diameter of only about 1 100 m. It is composed of two layers, the inner core and the outer coat, and the refractive index of the inner core.

Larger than the refractive index of the coat, light enters from one end and is emitted from the other end after multiple total reflections at the interface between the inner core and the coat. Optical fibers are mixtures and are amorphous. At present, the main component of optical fibers is silica.

BecauseSilicon dioxide. Transparent,Refractive indexI am suitable and can produce total reflection. And the storage hall has a rich amount of holding, and the cost is relatively low.

Silica is an inorganic substance with the chemical formula SiO, silicon atoms and oxygen atoms are arranged in a long-range order to form crystalline silica, and short-range ordered or long-range disordered arrangements to form amorphous silica.

Classification of mineralsin sedimentary rocks. , silica minerals occur mainly in clastic and siliceous rocks.

It can be used as a terrestrial mineral or as an autogenous mineral. The origins of these two silica minerals are very different, and skin rot must distinguish them.

Optical fibers areSilicon dioxide. 。Optical fibers can be used as light conduction tools, and the transmission principle is "optical."Total reflection

A light fiber is a glass fiber filament thinner than a human hair. Optical fibers were developed in the 20s of the 20th century, using ultra-pure quartz glass.

It is drawn at high temperature and has a good ability to guide light. Quartz optical fiber uses silica (SiO2) as the main raw material, and the refractive index of the core and cladding is controlled according to different doping amounts.

Distributed fibers.

Classification of optical fibers

There are two main types of optical fibers, gradient fibers and mutant fibers. The refractive index of the former is graded, while the refractive index of the latter is abrupt. It is also divided into single-mode fibers.

and multimode fiber. In recent years, new photonic crystal fibers have been introduced.

The optical fiber is a dual structure, the core part is high refractive index glass, and the surface part is low refractive index glass or plastic, and the light is transmitted in the fiber core, and the total reflection is continuously carried out at the junction of the surface layer, and it is transmitted forward along the zigzag shape of Ano Hui. This fiber, which is slightly thicker than a human hair, is a very amazing technology for such a thin fiber to have a dual structural distribution with a very different refractive index.

The above content refers to Encyclopedia - Optical Fibers.

Silica is transparent, has a suitable refractive index, and is capable of total reflection. And the reserves are abundant, and the cost is relatively low.

The so-called optical fiber is a medium that relies on the total internal reflection in the optical cable to achieve the transmission of information with light. Since it is transmitted with light, it is required that the medium should be as transparent as possible, silica is quartz, the transparency is very high and the cost is low, so it is a good light guide material, as for the conductivity, it does not conduct electricity, and the reason why it becomes a light guide fiber is not because of electrical conductivity, ordinary cables need to consider conductivity.

First of all, the material must be able to transmit light, and the refractive index must be appropriate to be able to fully reflect. Second, silica reserves are abundant and the cost is low; So choose silica.

An optical fiber is a communication line used to transmit optical signals and is made of materials such as alpha polysilicon or silicon dioxide. Among them, bicircular cluster silica is one of the main materials of optical fiber, which has the following advantages.

First, silica has a high permeability and a low refractive index. Due to its high transparency, optical signals can be transmitted efficiently. In addition, its refractive index is very low, so that the light is transmitted within the optical fiber without orange distortion, making the signal transmission more stable.

Secondly, silica has high strength and resistance to heavy pressure. Since optical fibers are often laid in harsh environments such as underground or subseabed, the fiber materials used need to be strong and durable. Silica filament has high strength and compressive properties, and can withstand the test of various environments.

Finally, silica materials** are relatively low. Compared with other optical fiber materials, the characteristics of silica are relatively low, which greatly reduces the cost of communication construction.

In short, silica material has the advantages of high transparency, good compressive resistance, high strength and low quality, and becomes an ideal bridge choice for optical fiber manufacturing. With the continuous progress of communication technology and the continuous improvement of optical fiber materials, the speed and quality of signal transmission will be further improved.

The optical fiber is silicon dioxide.

The main component of the optical fiber is pure simple silicon dioxide, which is high-purity Huisun silica, which uses the principle of total reflection of light. Optical fiber is an optical fiber with silicon dioxide (SiO2) as 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 the characteristics of low consumption and broadband, have been widely used in cable TV and communication systems.

Optical fiber is silicon dioxide, and optical fiber is the abbreviation of optical fiber, but optical communication systems often simplify (optical fiber) to fiber, because the technology to produce it can make it as thin as a hair. Silica transmits light, has a suitable refractive index, can produce total reflection, and has abundant silica reserves and low cost.

Optical fiber function

As the working wavelength of quartz series optical fibers developed in the field of optical communication, infrared optical fibers can only be used for 2pm even if they are used for a short transmission distance. For this purpose, it is possible to work in the longer infrared wavelength range, and the developed optical fiber is called an infrared optical fiber. Infrared optical fibers are mainly used for light energy transmission.

For example, there are: temperature measurement, thermal image transmission, laser scalpel medical, thermal processing, etc., and the penetration rate is still low.

Composite FiberComposite Fiber is an optical fiber made of multi-component glass with oxides such as sodium oxide (Na2O), boron oxide (B2O2), potassium oxide (K2O2), etc., which is characterized by a lower softening point of multi-component glass than quartz and a large difference in the refractive index between the core and the cladding. The main front trouser chain is used in the medical business of fiber optic endoscopes.

The above content refers to Encyclopedia - Fiber Optic Filament.

The optical fiber is silicon dioxide.

Optical fiber, or fiber for short, is a fiber made of glass or plastic that acts as a light conduction tool. The main use of optical fiber is communication. At present, optical fibers used in communication are basically quartz optical fibers, and their main components are high-purity quartz glass, that is, silicon dioxide (SiO2).

Silica is a raw material for the manufacture of glass, quartz glass, water glass, optical fibers, important components of the electronics industry, optical instruments, handicrafts and refractory materials, and is an important material for scientific research. When silica crystallizes perfectly, it is crystal; After silica gelatinization and dehydration, it is agate; The aqueous colloids of silica become opal when solidified; When the silica grains are less than a few microns, chalcedony, flint, and secondary quartzite are formed.

The principle of fiber optic communication

The principle of optical fiber communication is to make use of the phenomenon of total reflection. Total reflection is not the same thing as reflection from a mirror. Total reflection occurs during the propagation of light from a dense medium to a less dense medium, while the opposite is true for ordinary specular reflection.

At the transmitter end, the transmitted information (such as voice) should first be turned into an electrical signal, and then modulated to the laser beam emitted by the laser, so that the intensity of the light changes with the amplitude (frequency) of the electrical signal, and is sent out through the optical fiber; At the receiving end, the detector receives the optical signal and converts it into an electrical signal, which is demodulated and restored to the original information.

The optical fiber is silicon dioxide.

Optical fiber is the abbreviation of optical fiber, but optical fiber is often simplified to fiber in optical communication systems, because the technology to produce it can make it as thin as a hair. The classification of optical fibers includes optical fiber amplifiers or optical fiber trunks, etc., and some people ignore that although fiber has the meaning of fiber, it refers to optical fiber in the optical system.

The optical fiber actually refers to the fiber core made of transparent materials and the cladding layer made of materials with a slightly lower refractive index than the fiber core around it, and the optical signal injected into the fiber core is reflected through the cladding interface, so that the optical signal propagates forward in the fiber core. There are many types of optical fibers, and the functions and performance required vary depending on the application.

Fiber Classification:

1. Infrared optical fiber.

The working wavelength of the quartz series optical fibers, developed by the Institute of Optical Communications, can only be used for 2 PM even though they are used for short transmission distances. Infrared optical fiber is mainly used for light energy transmission, such as temperature measurement, heat map tung fiber pin image transmission, laser scalpel medical, thermal energy processing, etc., and the penetration rate is still low.

2. Plastic optical fiber.

This is an optical fiber made of plastic with both the core and cladding, and the early products were mainly used in optical communication for decoration and light guide lighting and close optical key paths. The raw materials are mainly plexiglass, polystyrene and polycarbonate, and the loss is restricted by the inherent CH bonding structure of plastics, which can generally reach tens of dB per km, and the connection is simple, and it is easy to bend and easy to build.