A diode-pumped CW mode-locked Nd∶YVO4 laser with a repetition rate of 1 GHz was demonstrated. The laser was passively mode locked by a semiconductor saturable absorber mirror (SESAM). The QML operation was successfully suppressed by using an output coupler with very low transmission (0.8%) and a 2 W LD pump source introducing a small pump spot in the laser crystal. The lasing oscillation threshold was 35 mW and CW mode locking threshold was 0.8 W. The maximum average output power was 210 mW with 1.6 W pump power.彭继迎（中国科学院长春光学精密机械与物理研究所,长春,130033;中国科学院研究生院,北京,100039）檀慧明（中国科学院长春光学精密机械与物理研究所,长春,130033）王保山（中国科学院长春光学精密机械与物理研究所,长春,130033;中国科学院研究生院,北京,100039）苗杰光（中国科学院长春光学精密机械与物理研究所,长春,130033;中国科学院研究生院,北京,100039）钱龙生（中国科学院长春光学精密机械与物理研究所,长春,130033）王勇刚（中国科学院半导体研究所,北京,100083）马骁宇（中国科学院半导体研究所,北京,100083）