Q-switched cryogenically cooled slab RF discharge CO laser operating in multi-line mode, single-line mode with a diffraction grating, and also with frequency selection by special spectral filters situated both outside and inside the laser cavity was experimentally studied. Characteristics of CO lasing on individual ro-vibrational spectral lines produced by this laser with various cavities under the same active medium and pump parameters were compared. Application of output couplers with a relatively narrow spectral band of high transmittance compared to the non-selective CO laser range of operation, but with high reflection in the rest of the range, was effective for obtaining narrow-band multiline lasing. For selection of the long-wave part of Q-switched CO laser spectrum, which was needed for frequency conversion into the long-wave mid-IR when mixing with CO₂ laser emission, application of a broadband spectral filter with a very low reflection coefficient in the spectral range where lasing was necessary to be suppressed (sort of a step function) proved to be efficient being installed outside the laser cavity.

实验研究了Q开关深冷平板RF放电CO激光器，该激光器工作在多线模式，带衍射光栅的单线模式以及通过位于激光器腔体内外的特殊光谱滤波器进行频率选择。比较了在相同的活性介质和泵浦参数下，由具有各种腔体的该激光器产生的单个旋转振动光谱线上的CO激光发射特性。与非选择性CO激光器工作范围相比，输出耦合器具有相对较窄的高透射率光谱带，但在其余范围中具有高反射率，对于获得窄带多线激光有效。为了选择调Q CO激光光谱的长波部分，_在图2的激光发射中，在需要抑制激射的光谱范围（阶跃函数的种类）中应用反射系数非常低的宽带光谱滤光片被证明是有效地安装在激光腔体外部的。