Main types like EDFA, SOA, and Raman Amplifiers help you fix signal loss in long fiber networks. They do this without changing light into electricity. They utilize a piece of optical fiber doped with. Optical amplifiers are used to create laser guide stars which provide feedback to the adaptive optics control systems which dynamically adjust the shape of the mirrors in the largest astronomical telescopes. Nowadays, SOAs have been considered as one of the key solutions to for number functionalities in the evolution of electronic as well as communication systems. e external pumping principles and gain mechanisms.