Chirpedpulse mismatching amplification of ytterbium doped fiber amplifier

Theory analysis were performed for ytterbium doped fiber amplifier(YDFA) on its characteristics of mismatching amplification on chirpedpulse with mid wavelength around 1 053nm. An excellent pulse can be achieved with optimistic input intensity and spectrum width. On the other end, by analyzing the phasemode of YDFA's mismatch amplication, a good result was found. Although the phasemodulate was serious, the phasemodulate during YDFA mismatch amplification affected the quality of pulse after compression weakly.