摘要
基于连续可调谐的钛宝石激光光源,建立了光腔衰荡光谱(CRDS)装置,实验表明,其不但具有10-4cm-1的光谱分辨率,测量灵敏度也好于10-10.cm-1。通过对C2H2气体在12 696.4cm-1附近的吸收光谱测量,验证了该装置的定量测量能力,并通过对混有痕量C2H2气体的氮气样品的光谱测量,表明该装置对C2H2气体的检测限为0.2ppmv。
A cavity ring-down spectrometer was built up using a CW tunable Ti： sapphire laser.The experiments show that not only the spectral resolution is up to the 10-4 cm-1 level,but the detecting sensitivity also exceeds 10-10 cm-1.With the measurements of the absorption spectroscopy of C2H2 near 12 696.4 cm-1,the quantitative capability of the instrument was demonstrated.Through the spectroscopy of the samples mixed with trace C2H2 in N2 gas,the detection limit of C2H2 was determined to be 0.2 ppm.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第3期835-838,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(10728408,20902085)
国家重点基础研究发展计划项目(2007CB922001)资助
关键词
光腔衰荡光谱
振转光谱
痕量检测
乙炔
Cavity ring down
Ro-vibration spectroscopy
Trace detection
C2H2
