Precautions for Using Optical Fiber
Due to the advantages of long transmission distance, small signal attenuation and strong anti-interference ability, optical fiber is widely used in monitoring projects, so what should be paid attention to when using optical fiber in video surveillance projects?
Learn about fiber optic accessories
When using optical fiber for engineering, you must first understand optical fiber and supporting products, such as optical fiber terminal boxes, optical fiber splicing boxes, optical fiber pigtails, optical fiber couplers, ODF distribution frames, etc., to understand how these supporting products are applied. Only by fully understanding the supporting products can a detailed equipment list be provided for purchase.
Understand the difference between optical transceivers and fiber optic transceivers
In analog monitoring, the optical fiber supporting equipment is an optical transceiver, which converts optical signals into BNC interface signals, while the optical fiber supporting equipment used in digital monitoring is a fiber optic transceiver, which converts optical signals into RJ45 interface signals. Therefore, according to different types of monitoring The project selects the appropriate fiber optic supporting equipment.
Pigtail interface type
The commonly used interface types of optical fiber pigtails are ST, FC, SC, FC/APC, SC/APC, etc., and the corresponding pigtail interface of the interface should be selected according to the optical fiber interface type of the optical transceiver or optical fiber transceiver used.
Fiber classification
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 the transmission distance of single-mode optical fiber can reach tens of kilometers. Therefore, single-mode optical fiber is mostly used in monitoring projects. Therefore, when purchasing optical fiber supporting equipment, it is also necessary to choose equipment that supports single-mode optical fiber. According to the materials used in the manufacture 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 the fiber referred to in the future mainly refers to silica fiber.
According to the working wavelength, it can also be divided into short-wavelength optical fiber and long-wavelength optical fiber.
Fiber splicing method
Fiber splicing can be divided into two methods: thermal fusion and cold splicing. Hot fusion is to fuse two optical fibers through an optical fiber fusion splicer, while cold splicing is to splice two optical fibers together through optical fiber cold splices. However, the cold joint is less stable than the hot melt method, so it is recommended to use the hot melt method.
Fiber laying method
The outdoor optical fiber can be laid overhead or buried. Since the optical fiber is made of optical fiber, do not twist the optical fiber hard during the laying process to avoid breaking the optical fiber inside.
