High Resolution and High Sensitivity Measurement of Methane at 1.51 μm

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2006,（9）
• 页码范围: 2415-2417
• 页数: 3页
• 语种: 英文

摘要

The high-resolution absorption spectrum of CH4 at 1.51 μm is observed by direct absorption spectroscopy technique with a White absorption cell. Multi-peak fitting technique is adopted to reveal line positions and line intensities of CH4 from 6608 cm-1 to 6625 cm-1. Special attention is paid on the determination of the line positions, and the accuracy is better than ±0.002 cm-1. A minimum measurable absorption of 2.1 × 10-s (3σr) has been achieved based on the measured direct absorption spectroscopy.