Generally, laser amplification systems can be divided into two types, high peak power laser systems and high average power laser systems. In recent years, there are more and more applications which need the characteristics of the above two systems at the same time. That is to say, the system is required to be able to output high peak power laser and to work efficiently with high repetition frequency, as well as with high energy conversion efficiency. According to the increasing application demand, the coherent amplification network (ICAN) plan solves the key problems limiting power increase, such as nonlinear damage of high power laser pulse in fiber, based on chirped pulse amplification, fiber beam splitting, fiber amplification and coherent beam combination techniques. The waveform distortion caused by the nonlinear effect in fiber is avoided, while the higher energy and peak power are obtained. It offers a solution to break through some key barriers which limit the development of high peak power, high repetition frequency pulse laser system. The scaling amplification characteristics of fiber amplification network provide solutions for many new applications, such as laser-based particle accelerator, laser-driven spent fuel transmutation, orbital debris removal, laser-driven fusion energy and so on.