December 02, 2023
ForewordHi everyone, I'm Mr. Lin, optical fiber is a fiber that can transmit light waves and various optical signals. In today's information age, people have a lot of information and data to process and process in economic activities and scientific research, and optical fiber is an ideal tool for information transmission. Compared with a traditional cable system, an information system based on optical communication technology can transmit more volume and more types of information in same time. One fiber optic cable carries as much information as 100 coaxial cables used by phones. At same time, transmission losses are low, and number of contacts can be reduced by 1/20. The wavelength range of light guide system is very wide, from tens of MHz/km to hundreds of GHz/km, and it can prevent noise of electrical signals. In addition, optical fiber consumes less material and saves a lot of non-ferrous metals compared to coaxial cables. Text
With advantages of long distance transmission, low signal attenuation and strong anti-interference ability, it is widely used in monitoring projects, so what should I pay attention to when using optical fibers in video surveillance projects?
More about ancillary fiber products
When using optical fiber for engineering purposes, you must first understand what is optical fiber and related products, such as optical fiber terminal boxes, optical fiber splice boxes, optical fiber pigtails, fiber optic connectors, ODF distribution frames, etc. to understand how these ancillary products are applied. Only with a full understanding of ancillary products can a detailed list of equipment for purchase be provided.
Understand difference between optical transceivers and fiber optic transceivers
In analog monitoring, supporting fiber optic equipment is an optical transceiver that converts optical signals to BNC interface signals, and supporting fiber optic equipment used in digital monitoring is a fiber optic transceiver that converts optical signals to RJ45 interface signals. , Select appropriate fiber optic auxiliary equipment for category monitoring project.
Pigtail interface type
Commonly used fiber optic pigtail interface types: ST, FC, SC, FC/APC, SC/APC, etc. Optical transceiver or fiber optic transceiver used.
Optical fiber is divided into two types: multi-mode optical fiber and single-mode optical fiber. The transmission distance of multi-mode optical fiber is short, and transmission distance of single-mode optical fiber can reach tens of kilometers. Therefore, single-mode optical fiber is mainly used in monitoring projects. Therefore, when purchasing equipment to support optical fiber, it is also necessary to select equipment that supports single-mode optical fiber. According to materials used in production of optical fibers, there are four types: quartz series, plastic-clad quartz core, multi-component glass fiber, and all-plastic optical fiber. Silica fiber is mainly used in optical communication, and fiber mentioned in future mainly refers to silica fiber.
When divided by working wavelength, it can also be divided into short wavelength optical fiber and long wavelength optical fiber.
Optical fiber fusion method
The welding of optical fibers can be divided into two methods: thermal welding and cold welding. Hot splicing is to fuse two optical fibers through an optical fiber splicer, and cold splicing is to join two optical fibers together through optical fiber cold splices. However, cold joint is less stable than hot melt method, so hot melt method is recommended.
Fiber laying method
Outdoor optical fiber can be laid overhead or underground. Since optical fiber is made of optical fiber, do not twist it strongly during installation, so as not to break optical fiber inside.