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介绍了一种腔内光强增强型凹面光栅选线法的热带连续波CO2激光器的设计及实验参数。在腔内不加CO2热吸收池,采用总气压为1 074.9 Pa、体积分数为13%CO2,15%N2和72%He的混合气体,放电电流为25 mA的情况下,除了在常规带0001-[1000,0200]Ⅰ,Ⅱ内观察到从R(56)到P(60)的100多条谱线以外,还得到11μm附近的其它谱线18条,其中0111-0310谱带9条,0111-1110谱带9条。实验发现,当激光器中氦气的比例升高时,激光的输出功率随之下降。每条谱线的腔内单程功率都超过35 W,足够满足大多数腔内光化学研究方面的需要。
The design and experimental parameters of a tropical continuous wave CO 2 laser with an optical cavity enhanced by concave grating are introduced. In the absence of CO2 heat absorption cell in the cavity, the total gas pressure of 1 074.9 Pa, the volume fraction of 13% CO2, 15% N2 and 72% He mixed gas discharge current of 25 mA, except in the conventional band 0001 - [1000,0200] In addition, more than 100 lines from R (56) to P (60) were observed in Ⅰ and Ⅱ, and 18 other lines near 11 μm were obtained, of which 9 bands were 0111-0310, 9 bands. The experiment found that when the proportion of helium in the laser increases, the laser output power decreases. The in-lumen one-way power of each line exceeded 35 W and was sufficient for most intracavity photochemical studies.