Views:0 Author:Site Editor Publish Time: 2021-06-09 Origin:Site
With the rapid development of network communication, people put forward higher requirements for the capacity and quality of communication. The advantages of an optical communication system in cost and transmission capacity make it the main body of information superhighway. As an indispensable part of optical fiber communication, the optical receiver has received extensive attention and research. With the application of new technology and the proposal of a new circuit structure, the optical receiver has been developed rapidly. After that, due to the endless outdoor demand, outdoor optical receivers as a special purpose optical receiver came into being.
Here is the content list:
What is the basic structure of an optical receiver?
What is the function of the optical receiver?
What are the application fields of outdoor optical receivers?
The optical receiver is a machine that receives the optical signal transmitted from the optical fiber and converts it into the electrical signal for amplification. The construction of a complete optical receiver can be roughly divided into three parts. Only by having three parts at the same time, can the optical receiver finally realize the function of detecting the weak optical signal, amplifying, shaping and regenerating the original transmission signal.
The first part is a photodetector. The main function of the photodetector is to use the photoelectric effect to transform the optical signal into an electrical signal, and the basic principle of its detection process is optical absorption. In the optical communication system, the requirements for photodetectors are high sensitivity, fast response, low noise, low cost and high reliability.
The second part is the optical receiving system. The components of the optical receiving system are usually placed at the receiving end, and the function of receiving antenna is to collect and gather the light field propagating in space to the detector surface.
The last part is signal processing. In the space optical communication systems, the signal received by the optical receiver is very weak, and in the case of high background noise field interference, the signal-to-noise ratio of the receiver will be low, so signal processing is very necessary. The components of this part generally include preamplifier, main amplifier, equalizer, decider, decoding circuit and so on.
Because the optical signal in the optical fiber is very weak, the electrical signal converted by the optical detector is very small, and the noise in the optical receiver will have a great impact on the optical receiver and even the whole optical fiber communication system. Therefore, the noise in the optical receiver should be as small as possible to ensure that the sensitivity of the optical receiver is high enough, and the optical fiber communication system can work normally.
In the optical fiber communication system, the task of the optical receiver is to recover the information carried by the optical carrier with minimum additional noise and distortion. Therefore, the output characteristics of the optical receiver comprehensively reflect the performance of the whole optical fiber communication system. After the optical signal transmitted by the optical transmitter is transmitted, not only the amplitude is attenuated, but also the pulse waveform is broadened. The function of the optical receiver is to detect the weak optical signal transmitted, amplify, shape and regenerate it into the original transmission signal.
The outdoor optical receiver is mainly used in buildings, communities or villages where users are concentrated, and high-level multi output distribution network. It is also suitable for use in places where it is not convenient to power on and a single device drives many users. If it is used in FTTB, FTTN, FTTC networks, it can realize the analog and digital signals to users. At the same time, it is also used in various two-way cable TV modems, CATV systems, satellite TV systems, residential CCTV monitoring systems, hotel audio-visual systems, military units, schools and other educational audio-visual systems. The outdoor optical receiver can also realize network integration with ONU or EOC.
In modern society, information interaction is showing explosive growth, which puts forward higher requirements for the transmission speed and quality of optical fiber transmission systems. Therefore, more attention should be paid to the research and optimization of the optical receiver to make it develop forward. Hengchi Electronic Equipment Co., Ltd. has more than 15 years of manufacturing experience, excellent test platform and equipment, and an outstanding team of responsible engineers. If you are engaged in outdoor optical receiver related business, you can consider our low-cost but high-quality products.