开展了HF/DF激光器谐振腔内基态分子光吸收对其输出性能影响的实验研究,测量并分析了从不同位置注入H2/D2时激光器的输出功率和光谱变化。结果表明:振动基态HF(ν=0)/DF(ν=0)分子通过单光子共振机制吸收1P支谱线,通过双光子共振机制吸收2P支谱线;振动-转动激射带间存在一定程度的级联跃迁效应;在基态分子与激发态分子数量相当(1···1)的情况下,HF激光器输出功率降低了50%左右,DF激光器输出功率降低了90%左右;利用传统的燃料组合研制燃烧驱动HF-DF双波段化学激光器是不可行的。 The experimental study on the influence of ground molecular absorption in the cavity of HF / DF laser on its output performance was carried out. The output power and spectral change of the laser when H2 / D2 was injected from different positions were measured and analyzed. The results show that the 1P branch line is absorbed by one-photon resonance mechanism and the 2P branch line is absorbed by the two-photon resonance mechanism. The vibration-rotation lasing band has a certain The output power of HF laser is reduced by about 50% and the output power of DF laser is reduced by about 90%. With the traditional method of Fuel Combustion Development HF-DF dual-band chemical laser combustion is not feasible.