Release time:

2023-08-16

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1. what is optical communication? Optical communication is a communication method that uses optical signals to transmit information. It is a high-speed, large capacity, low loss, strong anti-interference ability of communication, has become one of the important technologies in the field of modern communication. In optical communication, the light source converts information into an optical signal, transmits it through an optical fiber, and the receiving end converts the optical signal into an electrical signal for decoding. Optical communication is widely used in telecommunications, the Internet, data centers, medical, radio and television and other fields. With the continuous advancement of technology, the transmission rate and capacity of optical communication continue to increase, bringing more convenience to people's lives and work. The advantages of optical communication: (1) huge communication capacity In theory, an optical fiber can transmit 10 billion channels at the same time. At present, the experiment of transmitting 500000 channels at the same time has been successful, which is thousands or even hundreds of thousands of times higher than traditional coaxial cable and microwave. (2) Long relay distance Optical fiber has a very low attenuation coefficient. With appropriate optical transmission, optical receiving equipment, optical amplifier, forward error correction and other technologies, the relay distance can reach thousands of kilometers, while the traditional cable can only transmit 1.5km and microwave 50km, which can not be compared with it at all. (3) strong adaptability It has the advantages of not afraid of strong external electromagnetic field interference and corrosion resistance. (4) good confidentiality performance (5) Small size and light weight Disadvantages of optical communication: (1) The optical fiber structure is relatively fragile, the mechanical strength is poor, and it needs protection (2) High technical requirements for fiber cut and connection operations (3) Shunt, coupling operation is more cumbersome Development History of 2. Optical Communication Optical communication began to develop in the 1960 s and grew rapidly in the coming decades. The following are the key historical nodes of optical communication: In the 1960 s, the development of optical communication began in the 1960 s, starting with point-to-point communication through laser beams in the air. In the early 1970 s, optical communication began to be used for long-distance telephone communication, but the manufacture of optical fiber materials and the progress of light source technology are still the main difficulties. In the 1980 s, optical communication entered a period of rapid development. With the manufacture of optical fiber materials and the continuous improvement of light source technology, the transmission rate and transmission distance of optical communication have been significantly improved. In the 1990 s, optical communication technology was widely used, especially in the development of the Internet. In 1997, the global optical communications market was worth more than $10 billion billion. In the 2000 s, optical communication technology further improved the transmission rate and transmission distance, such as Wavelength Division Multiplexing(WDM) technology, which can simultaneously transmit multiple optical signals of different wavelengths on an optical fiber, greatly improving the transmission capacity and efficiency of the optical fiber. In the 2010 s, optical communication technology has become an indispensable part of modern communication field, widely used in telephone, broadband, mobile communication and other fields. At the same time, optical communication technology has also begun to be applied to smart home, intelligent transportation, smart home and other fields. Principles of 3. Optical Communication Optical communication uses the transmission characteristics of light to convert information into optical signals, transmit them through optical fibers, and then convert the optical signals into electrical signals for decoding. The main equipment of optical communication includes light source, optical fiber, optical receiver and so on. The light source may be a laser, a light emitting diode, or the like. The light pulse signal is generated by controlling the switching of the light source and the intensity of the light through an electrical signal. These signals are transmitted through the optical fiber to the receiving end, and the optical signal is converted into an electrical signal through the optical receiver. Application Scenarios of 4. Optical Communication Telecommunications: Optical communication technology has become one of the important technologies in the field of telecommunications, widely used in telephone, broadband, mobile communications and other fields. Data center: Data center needs high-speed and large-capacity data transmission. Optical communication technology can meet this demand and improve data transmission rate and capacity. Medical field: optical communication technology can be used for medical diagnosis and treatment, such as optical coherence tomography (OCT) technology can be used for diagnosis in ophthalmology, dermatology and other fields.

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