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.
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