激光瓦斯检定器是利用激光的吸收波长来检定瓦斯浓度。为了提高感度,把激光引入谐振器中。该谐振器具有两个共通上限的转换点,如3S_2→2P_4和3S_2→3P_1。可观测二转换点之一的波长上的幅射强度3S_2→2P_4。转换点的上限即为瓦斯吸收波长。根据《苏联发明公报》224879号和《SMRE》transl.№ 5804号 译出 Laser gas detector is the use of laser absorption wavelength to determine gas concentration. In order to improve the sensitivity, the laser is introduced into the resonator. The resonator has two common upper transition points, such as 3S_2 → 2P_4 and 3S_2 → 3P_1. The radiation intensity at the wavelength of one of the two transition points can be observed 3S_2 → 2P_4. The upper limit of the conversion point is the gas absorption wavelength. Translated according to “Soviet Bulletin of Inventions” No. 224879 and “SMRE” transl. № 5804