Citation:
James B. Kelman, Douglas A. Greenhalgh, Euan Ramsay, Dong Xiao, Derryck T. Reid, Flow imaging by use of femtosecond-laser-induced two-photon fluorescence, Optics Letters, Volume 29, Issue 16, 1873-1875, August 2004
Abstract:
A novel technique is demonstrated for the imaging of turbulent flows in which a
single window to the flow is the only optical access required. A femtosecond laser is used
to excite two-photon fluorescence in a disodium fluorescein-seeded water jet. The
fluorescence signal is generated only at the focal point of the laser due to the highly nonlinear
nature of the two-photon absorption and is collected in a direction counterpropagating
to the excitation beam. Tight focusing of the laser is used to limit the probe
volume and the two dimensional mean and RMS concentration images are collected by
raster scanning the laser.
