激光吸收光谱法实时监测原子蒸气密度

采用固体激光器泵浦环形染料激光器作为光源，通过激光吸收光谱法对钆原子蒸气密度进行实时监测。应用光纤远距离传输提高光路稳定性，采用多步吸收光程技术，并引入参考光消除激光功率不稳定因素影响。实验结果表明：采用该方法建立的原子蒸气密度实时监测系统标准误差约为4%，可为激光同位素分离过程提供可靠数据，从而提高分离效率。

Real-Time Monitoring of Atom Vapor Concentration With Laser Absorption Spectroscopy

The technology of laser absorption spectroscopy was used for real-time monitoring of gadolinium atom vapor concentration measurement and the solid state laser pumped ring dye laser was used as optical source.The optical fiber was taken to improve the stability of laser transmission.The multi-pass absorption technology combined with reference optical signal avoided the influence of laser power fluctuation.The experiment result shows that the system based on this detection method has a standard error of 4%.It is proved that the monitoring system provides reliable data for atom vapor laser isotope separation process and the separation efficiency can be improved.