Absorption measurements for highly sensitive diode laser of CO2 near 1.3μm at room temperature

• 来源期刊: 中国物理（英文版）
• 关键词: absorption spectroscopy wavelength modulation harmonic detection
• 年，卷（期）: 2005,（3）
• 页码范围: 482-486
• 页数: 5页
• 语种: 英文

摘要

Fifteen new absorption lines were observed when studing CO2 absorption spectroscopy by wavelength modulation technique with a distributed feedback lase. The overtone spectra of CO2 around 1.3μm and the corresponding spectral parameters (i.e. positions, intensities, self-broadening coefficients) are presented. The intensity of the weakest line detected is 2.25163×-27cm-1/(molecule·cm-2) at the pressure of 667Pa, with a corresponding absorption of 3.88×10-8.