Abstract
Wereporton the development of a highly sensitive detection system for measuring atmospheric by means of a laser-induced fluorescence (LIF) technique at using a diode-pumped Nd:YAG laser. A GaN-based laser diode emitting at is also used as an alternative fluorescence-excitation source. For laboratory calibrations, standard gas is diluted with synthetic air and is introduced into a fluorescence-detection cell. The LIF signal is detected by a photomultiplier tube andprocessed by a photon-counting method. The minimum detectable limits of the instrument developed have been estimated to be 0.14 ppbv and 0.39 ppbv (parts per billion, 10−9, by volume) in 60 s integration time (signal-to-noise ratio of 2) for 473 and excitation systems, respectively. Practical performance of the instrument has been demonstrated by the 24 hour continuous measurements of ambient in a suburban area.
© 2007 Optical Society of America
Full Article | PDF ArticleMore Like This
Yutaka Matsumi, Fumikazu Taketani, Kenshi Takahashi, Tomoki Nakayama, Megumi Kawai, and Yuka Miyao
Appl. Opt. 49(19) 3762-3767 (2010)
Patricia A. Cleary, Paul J. Wooldridge, and Ronald C. Cohen
Appl. Opt. 41(33) 6950-6956 (2002)
A. W. Tucker, M. Birnbaum, and C. L. Fincher
Appl. Opt. 14(6) 1418-1422 (1975)