As we all know, the DWDM technology the most common way used for increasing the capacity of optical fiber communication network. But do you know the main types of optical amplifiers used in DWDM network? This article will tell you all about pre-amplifier, booster amplifier, and line amplifier.

Firstly, we need to know that optical amplifiers are invented for extending the distance of signal transmission and saving the expensive cost of building many optical regenerator stations. The amplifiers can enlarge the optical small signals into big signals which are much easier to transmit and more difficult to lost. And in different places, we put different kinds of amplifiers: pre-amplifier, booster amplifier and line Amplifier.

Pre-amplifier always be placed in front of the signal receiver to amplify the optical signal, making sure the signal is detectable even after huge power loss. Because of the distance during signal transmission, the pre-amplifier is necessary in DWDM system. A pre-amplifier should provide high gain.

Booster amplifier can launch the optical signal into the transmitting fiber. It usually be installed in the transmitting side, ensuring the signal quality, and provides low gain and high output power.

After previous introduction, line amplifier is much easier to understand. Line amplifier is designed for providing the gain and output power which is required for long distance transmission. It usually be installed in the fiber links, almost every 90 km.

Knowing the basic information and differences between these three types of optical amplifiers must make you feel more clear about the DWDM system. Kindly visit our website page to see more details.