we present an all-fiber all-polarization-maintaining (pm) single mode (sm) fiber pulse nonlinear amplification system. the seed laser with a repetition rate of 200 mhz is amplified by two-section erbium-doped pm gain fibers with different peak-absorption rate. the amplified pulse duration can be compressed into 34-fs with 320-mw output power, which corresponds to 1.6-nj pulse energy and approximate 23.5-kw peak power. in addition, the amplified and compressed pulse is further coupled into the high nonlinear fiber and an octave-spanning supercontinuum generation can be obtained. to the best of our knowledge, it is the highest peak power and the shortest pulse duration obtained in the field of all-fiber all-pm sm pulse-amplification systems. (c) 2016 optical society of america