By using a Cr4+:YAG chip in the laser cavity as a saturable absorber, a laser diode continuously pumped Nd: YVO4 laser is passively Q- switched for the first time.

• 在Nd：YVO4激光谐振腔内采用Cr4＋：YAG作为饱和吸收体，实现了激光二极管连续泵浦Nd：YVO4高重复率被动调Q激光运转。