激光技术2012，Vol.36Issue(5)：670-673,4.DOI:10.3969/j.issn.1001-3806.2012.05.024
湍流对激光吸收光谱信号的影响及改善方法研究
Effect of turbulence on laser absorption signal and its improvement method
王立明 1张玉钧 1李宏斌 2周毅 1刘文清1
作者信息
- 1. 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室,合肥230031
- 2. 电子工程学院脉冲功率激光技术国家重点实验室,合肥230037
- 折叠
摘要
Abstract
When tunable diode laser absorption spectroscopy gas sensor is used in open optical path gas measurement, the laser absorption signal can be influenced by atmospheric turbulence. The amplitude of absorption signal varies with the fluctuation of atmospheric turbulence so that the obtained gas absorption spectrum signal is deformed and the measurement accuracy is affected. In order to improve laser absorption spectrum signal quality impacted by atmospheric turbulence and measurement sensitivity, a method, changing the scan frequency of laser wavelength, was put forward. The variance of average signal between adjacent periods of absorption spectrum was less than 0. 1 when the scan frequency of laser wavelength was 2kHz. This method effectively improved the laser absorption spectrum signal quality impacted by atmospheric turbulence.关键词
光谱学/波长快速扫描/湍流影响/吸收光谱/开放光路Key words
spectroscopy/ wavelength quick scan/ turbulence effect/ absorption spectrum/ open optical path分类
数理科学引用本文复制引用
王立明,张玉钧,李宏斌,周毅,刘文清..湍流对激光吸收光谱信号的影响及改善方法研究[J].激光技术,2012,36(5):670-673,4.
