【摘要】 本文报导将 Herriott 多程反射室与高灵敏光声光谱术结合为一体的共振多程光声检测技术。用功率5W 的 CO₂激光器作光源,测量了 CO₂、C₂H₄、SF₆气体相对浓度与光声信号关系曲线、最低检测灵敏度可达0.06 ppb(6×10^-11)。与一般单程非共振光声池比较,找们设计的光声池灵敏度可提高2～3个数量级。更多还原

【Abstract】 This paper reported on new acoustically resonantmultipass cell combining theHorriott optics with high sensitivity optoacoustic detection technique.Using a 5 W CO₂ laser as asource,we determined the microphone output voltage as a function of thc relative concentrationsof CO₂,C₂H₄ and SF₆ in N₂,respectively.The minimum detectable sensitivity is 0.06 ppb (6×10^-11),which has been increased 2-3 order of magnitude compared with that obtained in nonreso-nant single pass cell.更多还原