腔增强拉曼光谱方法检测痕量氢气
Chinese Journal of Quantum Electronics（2021）
Abstract
氢气作为潜在的能源载体和工业材料,在众多领域发挥着日益重要的作用.在很多应用中,对氢气的检测需要有更高的灵敏度、更快的响应和更大的动态测量范围.腔增强拉曼光谱法(CERS)通过Pound-Drever-Hall(PDH)稳频技术将激光和高精细度的光学谐振腔锁定,实现了1900倍的腔内功率增益,用于痕量氢气的检测.在7 mW的激光输入功率下,当积分时间为100 s时,自行搭建的腔增强拉曼光谱装置对H2的检测限为2 Pa.实验结果还表明拉曼散射强度与激光功率和气体压力具有良好的线性关系,示范了CERS方法高精度气体定量分析的潜力.
MoreKey words
Gas Sensing,Raman Spectroscopy,Coherent Anti-Stokes Raman Scattering Microscopy,Cavity Ring-Down Spectroscopy,High-Temperature Molecular Spectroscopy
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