Analysis of the principle of security video surveillance optical transceiver

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 good performance and have become the designated brands for some large projects. However, their expensive prices make it unacceptable to some users. The influential manufacturers of optical transceivers began to shift their products to digital optical transceivers in order to not lose their performance to foreign brands, and the price could be accepted by users. 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.

Optical transceiver application classification

According to the application field, the current optical transceiver equipment has the following types:

1. Monitoring optical transceiver: used to transmit video signals (such as ordinary video camera output is a video signal), and can simultaneously support the transmission of audio, control data, digital signals and Ethernet signals, mainly used in highways, urban transport, community Security and all areas that need to be monitored;

2. Optical transceivers for radio and television: used to transmit RF signals, and their end-to-end transmission is not point-to-point. It branches directly in the optical path and can be used by a single transmitter to multiple receivers. It is mainly used in the optical transmission field of cable TV;

3. Telecom 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 equipment connected to the optical transceiver is G.703 protocol, which is mainly applied to the fixed bandwidth telecommunication 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.

Release date:2011/12/22 15:57:34

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