标题：Application of wavelength scanning for measuring water vapour concentration by distributed laser diodebxy55
作者：Chang, Jun; Lv Guangping; Zhou, Guoqing; Chen, Kun; Zhang, Yan; Wang, Zhongliang; Zhang, Shicong; Wang, Qiang; Song, Fujun
作者机构：[Chang, Jun; Lv Guangping; Zhou, Guoqing; Zhang, Yan; Wang, Zhongliang; Zhang, Shicong; Wang, Qiang; Song, Fujun] Shandong Univ, Sch Informat Sci & En 更多
会议名称：Conference on Photonic Fiber and Crystal Devices - Advances in Materials and Innovations in Device Applications V
会议日期：AUG 21-22, 2011
来源：PHOTONIC FIBER AND CRYSTAL DEVICES: ADVANCES IN MATERIALS AND INNOVATIONS IN DEVICE APPLICATIONS V
关键词：Water vapor measurement; Distributed Feedback laser; Optical absorption
摘要：A technique which takes advantage of distributed feedback laser diode (DFB-LD) wavelength scanning to measure water vapor concentration is presented. Concentration is gotten by peak absorption rate according to Beer-Lambert law and absorption coefficient of water vapor in HITRAN database. Theoretical work on the pressure affection to light intensity absorption rate has been done, a scheme is presented to cope with the affection of overlap of two adjacent lines, it takes advantage of the peak absorption difference between 1368.597nm and 1367.862 nm, and the difference value is used to calculate the water-vapor concentration.