文献类型：期刊文献

英文题名：Improved approach for ultra-sensitive detection of NO

作者：Qian, Yixian[1];Sun, Huijuan[2]

第一作者：Qian, Yixian

通讯作者：Qian, YX[1]

机构：[1]Zhejiang Normal Univ, Inst Informat Opt, Jinhua 321004, Peoples R China;[2]Beijing Union Univ, Basics Courses Dept, Beijing 100101, Peoples R China

第一机构：Zhejiang Normal Univ, Inst Informat Opt, Jinhua 321004, Peoples R China

通讯机构：[1]corresponding author), Zhejiang Normal Univ, Inst Informat Opt, Jinhua 321004, Peoples R China.

年份：2011

卷号：19

期号：2

起止页码：739-747

外文期刊名：OPTICS EXPRESS

收录：;EI(收录号：20110413617958);Scopus(收录号：2-s2.0-78751535822);WOS:【SCI-EXPANDED(收录号:WOS:000286314600035)】；

基金：This work is supported by the Natural Science Foundation of China (NO.60702078) and Zhejiang province Science and Technology Foundation (NO.2010C33162).

语种：英文

外文关键词：Modulation - Refraction

摘要：An improved approach has been developed for ultra-sensitive detection of the concentration of NO using Faraday Modulation spectrometry (FAMOS) combined with the strong electronic transition. By changing the modulating magnetic field attributing to linear absorption and refraction of gas sample, the polarized laser was rotated and absorbed by the complex refraction index of NO. We confirm the relation between the magnitudes of absorption and the optimum modulation magnetic field. Also, the accuracy and the precision of the technique have been evaluated at different pressures. It is shown that the system is capable of detecting NO concentration down to 0.34 ppb.m. (C)2011 Optical Society of America