文档介绍：The highly sensitive detection of NO using FAMOS
by a fully-diode-laser-based UV system
Jie Shao, Hui Wang, Weidong Zhou, Baojing Peng, Chaofu Ying
Institute of Information Optics of Zhejiang Normal University, Jinhua, China
E-mail: shaojie@
Abstract—A spectrometer for detection of nitric oxide (NO) of these bands, and significant spectroscopic interferences,
by Faraday Modulation spectrometry in the sub-ppb range primarily with water [15].
Q
on its overlapped Q22() and R12() electronic
transition in X2Π(υ”=0)-A2Σ+(υ’=0) band has been Based upon the fundamental fact that the linestrengths
constructed using mercially available fully-diode-laser- of electronic transitions in molecules are in general
based laser system producing mW powers of ultraviolet light significantly larger than those of various types of
at ~ nm and its analytical performance has been vibrational transitions in the IR region [16,17], the present
evaluated. It is shown that the system is capable of detecting work constitutes a first evaluation of the performance of a
NO down to ppb·m under low pressure conditions (at prototype instrumentation for TDLAS built by a
S/N = 3 for a signal averaging of 5 sec). Also the accuracy mercially available diode laser system producing mW
the technique has been assessed at different pressure. power of deep UV laser with F