Abstract
The saturation characteristics of 3-pentanone fluorescence were investigated in an ambient temperature and pressure cell by imaging the fluorescence produced by a focused quadrupled Nd:YAG laser beam. The onset of fluorescence saturation was observed at laser fluences around 0.06 J/cm2, which is only about 1.3% of estimates that assume a two-level model and use measured values of the fluorescence lifetime and absorption cross-section. A spatially resolved model indicated that the saturation fluence changed only 10% when a Gaussian profile was used instead of a top-hat profile. Laser sources with significantly different temporal profiles will have different threshold fluence levels, but the present results suggest that saturation effects should be monitored in planar laser-induced fluorescence imaging experiments using 3-pentanone.
References
M.S. Tsurikov, N.T. Clemens, The structure of dissipative scales in axisymmetric turbulent gas-phase jets, in 40th AIAA Aerospace Sciences Exhibit, AIAA Paper 2002. Reno, NV (2002)
Y. Haas, Photochem. Photobiol. Sci. 3, 6 (2004)
R. Stevens, H. Ma, C.R. Stone, H.L. Walmsly, R. Cracknell, Proc. Inst. Mech. Eng. D. J. Automob. Eng. 221, 713 (2007)
A. Lozano, B. Yip, R. Hanson, Exp. Fluids 13, 369 (1992)
W.E. Moerner, J. Phys. Chem. B 106, 910 (2002)
J.W. Daily, Appl. Opt. 17, 225 (1978)
R. Martinez, A.A. Buitrago, N.W. Howell, C.H. Hearn, J.A. Joens, Atmos. Environ. A Gen. Top. 26, 785 (1992)
A.E. Siegman, How to (Maybe) measure laser beam quality. Presented at OSA TOPS (1998)
A.E. Siegman, M.W. Sasnett, J. Quantum Electron. 27 (1991)