Air Pollutants Study by Differential Optical Absorption Spectroscopy with Transmit-Receive Fibers

作者：Wei Yong-jie^*; Geng Xiao-juan; Chen Bo; Liu Cui-cui; Chen Wen-liang

来源：Spectroscopy and Spectral Analysis, 2013, 33(10): 2783-2786.

DOI：10.3964/j.issn.1000-0593(2013)10-2783-04

• Differential optical absorption spectroscopy
• Transmit-receive fibers
• Air quality monitoring

The differential optical absorption spectroscopy system is presented to monitor air pollutants, such as SO2, NO2, etc. The system employs a reflective telescope to collimate light source and focus absorbed light. A combined transmitting and receiving fiber bundle is set to the focus of a concave mirror. A Xenon lamp works as the light source. The light is coupled into the transmitting fiber, and then collimated by the reflective telescope system. After absorbed by the pollutants, the light is reflected by a pyramid mirror far away the telescope. Then the absorbed light is incident on the concave mirror the second time, and focused on the focal plane again. The receiving fiber induces the light which carries the information of the measured gas into a spectrometer. We can get the concentration of the pollutants by DOAS algorithm. Experimental results show that the proposed method can be adopted to measure some pollutants in air quality monitoring.

• 出版日期2013-10
• 单位河北工业大学