WATER VAPOR DETECTION SYSTEM BASED ON TERAHERTZ AND DETECTION METHOD

摘要

Provided are a water vapor detection system (100) based on terahertz and detection method, the water vapor detection system (100) includes a laser (110), a terahertz emission unit (120), a vapor container (130) to be detected and a terahertz detection unit (140), the terahertz emission unit (120) and the terahertz detection unit (140) are oppositely arranged, the vapor container (130) to be detected is arranged between the terahertz emission unit (120) and the terahertz detection unit (140), and the vapor container (130) to be detected contains hot vapor; wherein, the laser (110) is used to emit pump light and detection light, the pump light is transmitted to the terahertz emission unit (120), so that the terahertz emission unit (120) radiates a terahertz wave and transmits it to the vapor container (130) to be detected, the detection light and the terahertz wave with water vapor information after passing through the vapor container (130) to be detected are transmitted to the terahertz detection unit (140), the terahertz detection unit (140) analyzes and processes the detection light and the terahertz wave to obtain the frequency domain spectrum of the water vapor around the vapor container (130) to be detected, thus, the detection of water vapor leakage of the vapor container (130) is realized.