介绍了一种新颖的短腔电光调Q窄脉宽激光器，通过分析影响脉宽的主要因素，确定了激光器的结构及参数。在准连续端面泵浦条件下，采用掺杂原子分数为1.0%、沿a轴切成布儒斯特角的Nd:YVO4晶体作为增益介质，直接获得偏振光振荡，有效缩短了腔长。在物理腔长20 mm时，采用退压式电光主动调Q结构，减小了插入损耗，获得了脉冲宽度为1.049 ns、单脉冲能量为0.32 mJ、光束质量平方因子为1.9的稳定激光输出。

A novel electrooptically Qswitched laser with short cavity was demonstrated. Its optimal structure parameters were determined via the analysis of factors related to output pulse width. Quasicontinuous endpumped Nd:YVO4 crystal with concentration of 1.0 % was cut along Brewster angle in aaxis, in order to ensure polarized oscillation. Thus, the cavity length was shortened efficiently due to the omission of quarter wave plate in voltagedecreased Qswitching structure. In condition of 20 mm physical cavity length, the narrowest output pulse width of 1.049 ns, pulse energy of 0.32 mJ and beam quality factor of 19 were achieved．