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We report an LD side-pumped continuous-wave passive mode-locked Nd:YA G laser with a Z-type folded cavity based on a semiconductor saturable absorber mirror (SESAM).The average output power 2.95 W of mode-locked laser with electro-optical conversion efficiency of 1.3% and high beam quality (M2x=1.25 and M2y=1.22) is achieved.The repetition rate of mode-locked pulse of 88 MHz with pulse energy of 34 nJ is obtained.