The gain characteristics of a CO₂ laser pumped by a longitudinal pulsed discharge were investigated to develop a compact He-free CO₂ laser operating at a high repetition rate. The longitudinal discharge tube had an inner diameter of 0.8 cm and a length of 45 cm. High-voltage pulses with a discharge starting voltage of 13.4–30.2 kV at a rise time of about 321 ns were applied to the discharge tube. CO₂/N₂ mixture gas with mixing ratios of 1:0, 1:1, 1:2 and 1:3 was used. The small signal gain coefficient was measured by inputting a seed CO₂ laser pulse into the longitudinal discharge tube. The small signal gain coefficient depended on the delay time between the start of the discharge in the longitudinal discharge tube and the input of a seed CO₂ laser pulse, the gas mixing ratio, the gas pressure, the repetition rate and the input energy to the longitudinal discharge tube. In this work, in He-free gas, the maximum small signal gain coefficient at a repetition rate of 300 Hz was 2.11%/cm with a delay time of 30.4 μs, a CO₂/N₂ gas mixing ratio of 1:2, a gas pressure of 2.6 kPa and an input energy of 191 mJ.

_{研究了由纵向脉冲放电泵浦的CO 2}激光器的增益特性，以开发在高重复率下工作的紧凑型无氦CO _{2激光器。}纵向放电管的内径为0.8cm，长度为45cm。对放电管施加放电起始电压为 13.4-30.2 kV、上升时间约为 321 ns 的高压脉冲。使用混合比为1:0、1:1、1:2和1:3的CO ₂ /N _{2混合气体。}通过将种子CO ₂激光脉冲输入纵向放电管来测量小信号增益系数。小信号增益系数取决于纵向放电管中放电开始和种子CO ₂激光脉冲输入之间的延迟时间、气体混合比、气体压力、重复率和输入能量。纵向放电管。本工作在无He气体中，重复频率为300 Hz、延迟时间为30.4 μs、CO ₂ /N ₂气体混合比为1:2时的最大小信号增益系数为2.11%/cm，气体压力为 2.6 kPa，输入能量为 191 mJ。