Views:0 Author:Site Editor Publish Time: 2021-07-22 Origin:Site
In order to meet the needs of high-speed and high-capacity data transmission of telecommunication/data communication networks, optical fiber communication system has replaced the traditional electrical communication technology. Compared with traditional electrical communication, the optical fiber communication not only has a very large bandwidth, but also has the advantages of no electromagnetic interference, no crosstalk, low loss and high reliability. Because of these advantages, long-distance communication, LAN, video relay, cable TV and sensor all use optical fiber as the communication medium. As a very important module in optical fiber communication system, the optical receiver naturally attracts people's attention and expectation.
Here is the content list:
What are the components of the outdoor optical receiver?
Where can an outdoor optical receiver be applied?
What is the benefit of outdoor optical receivers?
The complete optical fiber communication system consists of two parts: the upper part is the optical transmitter, which is mainly composed of the multiplexer, frequency synthesizer, laser driver and laser diode; the lower part is the optical receiver, which is mainly composed of the photodiode, preamplifier, main amplifier, clock and data recovery (CDR) circuit and tap changer.
The preamplifier converts the weak current signal detected by the photodiode into the voltage signal, and provides sufficient amplification function. The main amplifier completes the further amplification of several to tens of millivolts voltage signal output by the preamplifier, so that the output voltage signal with fixed amplitude and swing of several hundred millivolts can be used for subsequent circuits. CDR circuit is used to extract the clock signal of the detected pseudo-random data and provide clock for the decision circuit and the tap circuit. The tap changer converts a single channel high-speed pseudo-random signal into a multi-channel low-speed pseudo-random signal, which can reduce the difficulty of subsequent circuit design. The tap changer is equivalent to a series of the parallel converter.
The outdoor optical receiver is mainly used in the field of optical fiber communication, which has profound and far-reaching significance for the development of the optical fiber communication industry. Outdoor optical receiver is mainly used in buildings, communities or villages where users are concentrated, high-rise multi output distribution networks, and where a single device drives multiple users. At the same time, it is also widely used in various cable TV systems, two-way cable TV modems, cable TV systems, satellite TV systems, community closed-circuit TV, community closed-circuit TV monitoring systems, hotel audio-visual systems, military, school audio-visual systems and other educational audio-visual systems. If it is used in FTTB, fttn, FTTC network, it can realize the analog and digital signal transmission to users, and also realize the network integration with ONU or EOC.
The goal of optical fiber communication is to realize long distance and large capacity data communication. For example, telephone communication between Europe and the United States is achieved through an optical fiber system installed in the Atlantic Ocean. In order to ensure the transmission quality of optical fiber communication system, optical receiver retains many advantages in the continuous development.
Firstly, the outdoor optical receiver has high sensitivity and fast response. It can match with the existing high-speed transmission optical fiber network, and ensure to realize the function of detecting weak optical signal, amplifying, adjusting and regenerating the original transmission signal. Secondly, the optical receiver needs to transform and amplify the signal with minimum additional noise in the optical fiber system. Therefore, in the case of high background noise, outdoor optical receiver should have the characteristics of low noise to avoid more additional noise. Finally, the outdoor optical receiver has the advantage of high reliability. Because the optical receiver is mainly used in long-distance and high-capacity optical fiber communication, outdoor optical receiver must have high reliability for long-distance communication transmission.
In modern society, the information interaction presents explosive growth, which puts forward higher requirements for the transmission speed and quality of optical fiber transmission systems. Therefore, even if the outdoor optical receiver has many advantages, we must pay attention to its research and optimization 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 excellent team of responsible engineers. If you are engaged in outdoor optical receiver related business, you can consider our low-cost but high-quality products.