Abstract

A variety of laser-induced fluorescence schemes were examined experimentally in atmospheric pressure flames to determine their use for sodium atom and salt detection in high-pressure, optically thick environments. Collisional energy transfer plays a large role in fluorescence detection. Optimum sensitivity, at the parts in 10⁹ level for a single laser pulse, was obtained with the excitation of the 4p–3s transition at 330 nm and the detection of the 3d–3p fluorescence at 818 nm. Fluorescence loss processes such as ionization and amplified spontaneous emission were examined. A new laser-induced atomization/laser-induced fluorescence detection technique was demonstrated for NaOH and NaCl. A 248-nm excimer laser photodissociates the salt molecules present in the seeded flames prior to atom detection by laser-induced fluorescence.

© 1993 Optical Society of America

Two-photon laser-induced fluorescence of sodium in multiphase combustion

Keke Zhu, Stuart J. Barkley, Chloe E. Dedic, Travis R. Sippel, and James B. Michael
Appl. Opt. 59(18) 5632-5641 (2020)

Laser-induced fluorescence measurement of oxygen atoms above a catalytic combustor surface

Mark J. Dyer, Lisa D. Pfefferle, and David R. Crosley
Appl. Opt. 29(1) 111-118 (1990)

Photolysis–laser-induced fluorescence diagnostic for GaCl

Angelo J. Alfano and David J. Benard
Appl. Opt. 32(27) 5373-5378 (1993)

Strategies for laser-induced fluorescence detection of nitric oxide in high-pressure flames. I. A–Xexcitation

Wolfgang G. Bessler, Christof Schulz, Tonghun Lee, Jay B. Jeffries, and Ronald K. Hanson
Appl. Opt. 41(18) 3547-3557 (2002)

Strategies for laser-induced fluorescence detection of nitric oxide in high-pressure flames. II. A–X(0,1) excitation

Wolfgang G. Bessler, Christof Schulz, Tonghun Lee, Jay B. Jeffries, and Ronald K. Hanson
Appl. Opt. 42(12) 2031-2042 (2003)