Trace Gas Sensing Based on Laser Photoacoustic Spectroscopy

There is significant meaning for the development of trace gas detection in the atmospheric environment monitoring, long distance detection of explosives and the physiological state of biont. For example, the trace gas of atmosphere, however, always exists with the concentration of pptv-ppmv. Although the concentration is very low, it has a great impact on the environment. Detecting this trace gases’ component, concentration and its variation in the interspaces and period precisely have an extraordinary meaning, especially in the basic research fields and applied technique domain.