Abstract

Sequential two-photon-laser-induced fluorescence (TP-LIF) in NO has been achieved by using 226-nm radiation to excite the X2Π → A2Σ transition followed by excitation of the A2Σ → D2Σ transition using the fundamental output of a Nd:YAG laser at 1064 nm. The resulting fluorescence was monitored at wavelengths as low as 187 nm (D2Σ → X2Π transition), thus permitting major discrimination against conventional noise sources as encountered in single-photon-laser-induced fluorescence (SP-LIF) systems. Also, since the 226-nm radiation used in the TP-LIF method is generated in the same manner as in the SP-LIF technique (i.e., the sum-frequency mixing of 288-with 1064-nm radiation), the two-photon sequential-pumping scheme requires no major extra optical hardware. Although the final optimization of the TP-LIF NO method has not yet been completed, extrapolations based on currently measured signal and noise levels suggest a detection sensitivity level of 3 parts in 1013 (0.3 pptv) under atmospheric conditions. This would represent approximately a 25-fold increase in sensitivity over the SP-LIF NO technique.

© 1982 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Sequential two-photon laser-induced fluorescence detection of mercury

M. O. Rodgers, J. D. Bradshaw, K. Liu, and D. D. Davis
Opt. Lett. 7(8) 359-361 (1982)

Single photon laser-induced fluorescence detection of NO and SO2 for atmospheric conditions of composition and pressure

J. D. Bradshaw, M. O. Rodgers, and D. D. Davis
Appl. Opt. 21(14) 2493-2500 (1982)

Sequential two-photon laser-induced fluorescence: a new technique for detecting hydroxyl radicals

J. D. Bradshaw, M. O. Rodgers, and Douglas D. Davis
Appl. Opt. 23(13) 2134-2145 (1984)

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 (4)

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 (9)

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