在放电激励重复频率气体激光研究中，激光器重复频率运行能量稳定输出是提高其输出平均功率及其实用化的基础。利用实验室已建立的单脉冲输出能量焦耳级的放电激励重复频率脉冲HF激光装置，通过调节气体介质循环速率及优化实验条件，开展激光器重复频率运行稳定输出实验研究，获得激光器重复频率运行时能量稳定输出的最佳工作条件。研究结果表明：随着运行频率的上升，激光输出能量衰减较快；增大气体介质循环速率有利于改善放电稳定性，提高激光器重复频率运行时输出能量稳定性。当混合气体工作介质以3.5 m/s的流速循环时，激光器可实现1~50 Hz重复频率激光输出，在重复频率50 Hz运行时稳定输出能量约130 mJ，能量波动约5%。

In the investigation of gas laser pumped by electric discharge, the stability of laser output energy in repetition rate mode is the foundation of increasing its output average power and its application in practice. By adjusting the velocity of gas flow and optimizing the operating condition of laser, the output energy stability of laser in repetition rate mode is studied experimentally with joule level discharged-pumped pulsed HF laser, and the optimal operating condition of laser is obtained. The experimental results show that laser output energy decreases quickly with the repetition rate increasing; and increasing gas circulating velocity is beneficial to improve the discharge stability and the stability of laser output energy in repetition rate mode. When the gas mixture circulates at 3.5 m/s flowing velocity, laser can operate at repetition rate from 1 Hz to 50 Hz and operating stability keeps well. Under these conditions, each laser pulse of 130 mJ is obtained stably, and the fluctuation of output energy is about 5%.