Highly Sensitive Tunable Diode Laser Absorption Spectroscopy of CO2 Around 1.57 μm

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2005,（1）
• 页码范围: 57-60
• 页数: 4页
• 语种: 英文

摘要

The absolute absorption spectrum intensities of carbon dioxide samples has been recorded with a tunable diode laser spectrometer in the spectral range 6350-6364 cm-1, which is suitable for the in-situ sensing of carbon dioxide in the lower stratosphere studied using a commercial telecommunication-type diode laser. It was found that the typical uncertainty of experimental line intensities is about 1% compared with the values listed in the HITRAN database, which are calculated by direct numerical diagonalization. The intensity of the weakest line we detected in this experiment is 1.116 × 10-26 cm-1/(molecule, cm-2) at the pressure of 0.5 Torr, and the corresponding absorption is 3.2 × 10-6 with SNR of 4.53.