How Does Optical Cable Transmission Use The Principle Of Total Reflection Of Light？
Light is an electromagnetic wave. The visible light part has a wavelength range of 390~760nm, the part greater than 760nm is infrared light, and the part less than 390nm is ultraviolet light. The optical fibers used are 850nm, 1300nm, 1310nm, and 1550nm.
In the optical fiber communication system, the input signal sent to the optical transmitter, the optical power output by the light source varies with the current of the input signal, that is, the light source completes the electrical/optical conversion, and the corresponding optical power signal is sent into the optical fiber for transmission; After the signal reaches the receiving end, the input optical signal is directly detected by the photodetector, and the optical/electrical conversion is completed. Then complete certain processing to make it return to the original electrical signal, thus completing the entire transmission process.
The manufacturing process of optical fibers is usually divided into two steps: the production of optical fiber preforms and the drawing of optical fibers: there are four main production processes of optical fiber preforms: chemical vapor deposition (MCVD), axial vapor deposition (VAD), and out-rod chemical vapor deposition. The optical fiber preform of our company adopts the OVD+OVD process; the optical fiber drawing is to clamp one end of the optical rod in the drawing furnace, place it vertically, and heat the lower end in the heating furnace To about 2100°C, the ends are melted and then drawn into an optical fiber.
The bare fiber is generally divided into three layers: a high-refractive-index glass core in the center, a low-refractive-index silica glass cladding in the middle, and a resin coating for reinforcement at the outermost. Fiber diameters are typically 245 μm (0.245 mm).
As a communication carrier linking base stations, communication optical cables play a vital role. According to various applications and environmental conditions, outdoor optical cables can be designed into different structures, so as to be suitable for overhead, direct burial, pipeline, underwater and other laying methods. If necessary, my country’s “eight vertical and eight horizontal” optical cable backbone network and various access networks, a total of 79,000 kilometers of laying mileage.
Indoor optical cables are not only used for user entry, but also used for indoor wiring, communication equipment, data equipment, computers, switches, end-user equipment and optical fiber active connectors. A wide range of application scenarios has effectively promoted cloud computing, big data, physical The development of emerging technologies such as networking.
The outer sheath of the butterfly drop cable has the advantages of waterproof, anti-ultraviolet, flame retardant, environmental protection, etc., and meets the requirements of fiber-to-the-home (FTTH), fiber-to-the-office (FTTO) and fiber-to-the-building (FTTB) fiber access network connections, as PITH The optical cable line from the user access point to the user terminal in the network is currently the largest customer demand.
In the big data industry, the company has provided one-stop optical interconnect solutions and products for data centers, providing end-to-end services from design to product selection in terms of chips, packaging, optical interconnection, and wiring systems, with distinctive technical characteristics. Big data industry.
Post time: Feb-02-2021