Anti-video surveillance optical transceiver technology

As the name implies, optical transceivers are terminal devices for optical signal transmission. Due to the substantial price reduction of optical fiber and its wide range of applications in various fields, the use of optical transceivers is increasing, and manufacturers of optical transceivers have mushroomed. However, because some of these technologies are relatively mature when the optical transceiver market is still very small, the development of new technologies requires a lot of manpower and material resources. Therefore, most of the manufacturers of optical transceivers are mainly small and medium-sized enterprises. Various brands are emerging one after another, but the quality is very different. The optical transceivers of some well-known foreign brands (such as IFS, fiber, options, etc.) have entered the Chinese market with their good performance and have become the designated brands of some large projects. However, their expensive prices make it unacceptable to some users. Some domestic companies in this environment Influential manufacturers of optical transceivers have begun to shift their products to digital optical transceivers, in order to not lose their performance to foreign brands, and the price will allow users to accept it. These domestic enterprises start from their own, from the quality of the practice to let the optical transceiver market become more standardized, but also to allow people from the new domestic brands have a new understanding.

In the long-distance optical fiber transmission, the optical fiber cable has little influence on the signal transmission. The transmission quality of the optical fiber transmission system mainly depends on the quality of the optical transceiver. Because the optical transceiver is responsible for the photoelectric conversion and the optical transmission and the optical reception, its advantages and disadvantages directly affect the entire system. Many new users or interested users need to understand the performance and application of optical transceivers to better configure and purchase.

The application of Optical Multiplexer is classified according to the current application of Optical Multiplexer:

1. Optical monitor for monitoring: It is used to transmit video signals (such as ordinary video camera output is a video signal), and can simultaneously transmit audio, control data, switch signals and Ethernet signals, mainly used in highways, urban transport, and communities. Security and all areas that need to be monitored;

2. Radio and television optical transceivers: used to transmit RF signals, and its end-to-end non-point-to-point transmission, it is directly branched in the optical path, and can be used by multiple transmitters for one transmitter, mainly used in the optical transmission field of cable TV;

3. Telecommunication Optical Transceivers: Each basic channel of its terminal is 2M, which is also commonly referred to as 2M. Each 2M channel can transmit 30 telephone lines or transmit 2M bandwidth network signals. It is only a fixed-bandwidth channel, and its use depends mainly on The supporting device connected to the optical transceiver is G. The 703 protocol is mainly applied to the fixed bandwidth telecommunications optical communications field.

Based on the different applications of these fields, the optical transceivers used by radio and television and telecommunications are relatively fixed and have fewer varieties. This is not detailed here. This chapter mainly introduces the configuration of optical transceivers used in the surveillance field.