Abstract

Wereporton the development of a highly sensitive detection system for measuring atmospheric NO2 by means of a laser-induced fluorescence (LIF) technique at 473  nm using a diode-pumped Nd:YAG laser. A GaN-based laser diode emitting at 410  nm is also used as an alternative fluorescence-excitation source. For laboratory calibrations, standard NO2 gas is diluted with synthetic air and is introduced into a fluorescence-detection cell. The NO2 LIF signal is detected by a photomultiplier tube andprocessed by a photon-counting method. The minimum detectable limits of the NO2 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 410  nm excitation systems, respectively. Practical performance of the instrument has been demonstrated by the 24 hour continuous measurements of ambient NO2 in a suburban area.

© 2007 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (353)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription