Maximum range , as a combination property for evaluating ranging performance of a laser range finder , one of the important factors that affect the operational effectiveness of weapon systems , is paid more and more attention .In order to realize high beam quality and narrow pulse width seed source of the laser ranging system , the electro-optic Q-switch rubidium titanyle phosphate RbTiOPO 4 ( RTP) crystal used to be used in the low-repetition-rate Q-switch was used in high repetition rate laser.A laser at 1064nm was obtained at repetition rate of 25Hz,pulse width of 1.8ns,pulse energy of 1.5mJ,beam quality of M2 <1.3.The results show that this laser provides a qualified seed source for narrow pulse width of 1ns~3ns,pulse energy of 200mJ and no water-cooled all-solid-state laser ranging system.These results are helpful to the laser design with high beam quality and narrow pulse width .%最大测程作为评估测距性能的综合性指标，成为影响武器系统作战效能的重要因素。为了研制满足作战效能的远程激光测距系统的高光束质量窄脉冲宽度种子源，采用将传统高重频电光调Q磷酸钛氧铷晶体应用于低重频调Q的方法，实现了重复频率25Hz、脉冲宽度1.8ns、单脉冲能量1.5mJ的输出，光束质量M2＜1.3。结果表明，该研究为远程激光测距系统所需窄脉冲宽度1ns～3ns、大脉冲能量200mJ、高光束质量的1064nm无水冷全固态激光源提供了合格的种子源。这一结果对高光束质量窄脉冲宽度的激光器的设计是有帮助的。
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