二维振镜调谐TEA CO_2激光器

Tunable TEA CO_2 Laser by a Two-Dimensional Scanning System

报道一种快速调谐TEA CO2激光器。该激光器采取紧凑式Ernst电极,火花阵列放电紫外预电离方式,采用二维振镜扫描衍射光栅的方案实现了激光的调谐输出。激光器可输出谱线75支,其中55支谱线输出能量超过1 J,当激光器高重复频率运转时,10P（20）谱线基模能量大于300 mJ,脉冲宽度约为70 ns。这种激光器可以在10 ms内实现9.2～10.8μm范围内任意两条谱线的调谐输出。

A rapidly tunable TEA CO, laser is reported. The main electrodes of the laser take the form of Ernst with the spark array preionization. With the method of a two-dimensional （2D） scanning system and a diffraction grating, rapidly tuned TEA CO2 laser output is realized. Laser with 75 emission lines of the CO2 molecule rotational transition is obtained, and there are 55 lines, whose pulse energy of laser radiation exceeds 1 J. The pulse energy of 10P（20） line is over 300 mJ in single-transverse mode at a repetition rate of 100 Hz, and the width of the light pulse is 70 ns. The system can be tuned between two different rotation lines spanning the wavelength range from 9.2 to 10.8 μm within 10 ms.