What is the function of optical multiplexer
Writer：Fctel Time：2019-06-19 15:22 Browse：
Many people have never heard of an optical multiplexer. Even some of them don't know what it is. In fact, an multiplexer is a terminal device for optical signal transmission. In short, the multiplexer is a signal converter, with one at the beginning and one at the end. The starting end converts the electrical signal into the optical signal, and the terminal converts the optical signal into the electrical signal, which is the optical terminal. So there are three parts: starting end (optical transmitter), transmission medium and terminal (optical receiver). However, what is the function of the multiplexer for such frequent signal conversion?
As we all know, the speed of light is the fastest. This high-intensity transmission efficiency will ensure the effectiveness and timeliness of some of our work, such as video surveillance. Ordinary signals can not carry the rapid spread of big data, and real-time monitoring video must ensure the timely, smooth and high-definition picture. But the camera and computer display can not directly generate or receive optical signal, so the application value of optical terminal is reflected.
It is worth mentioning that optical terminals are divided into analog optical terminals and digital optical terminals, which are also called video optical terminals.
Analog optical terminal needs to modulate the amplitude or frequency of the signal to convert the electrical signal into optical signal. After receiving the optical signal at the terminal, it also needs to demodulate to restore the data and image information.
The digital optical terminal is to use such numbers as 0 and 1 to digitize the data and images, compile them into multi-channel low-speed signals, then convert them into optical signals, restore them into multi-channel low-speed signals at the terminal, and finally convert them into video, images, data, etc.