The phenomenon is put forward recently that pulse can selfsimilarly evolve and propagate in optical fibers with normal GVD and gain has a bright prospect for given femtosecond fiber amplifier and lasers. The pulse energy obtained by selfsimilar evolution technique is one or two orders of magnitude larger than that of existing lasers. The pulse will not break at high power level, and it can be dechirped to obtain a femtosecond pulse, from which million watts peak power has been realized. This paper introduces the current situation and progress of amplifiers and lasers using selfsimilar technique.