The dye used is Coumarin 153 in ethanol which produces
a dye beam with a tunable wavelength (from 350 nm to
610 nm), and is then converted by a Frequency Conversion
Unit (FCU) that comprises of a BBO doubling crystal,
a compensator and a wavelength separator to produce a UV
beam at a wavelength from 175 nm to 305 nm with an average
power of 10 mJ per pulse. The laser goes through the energy
monitor and sheet optics to produce a laser sheet of 30mmin
height, and aligns to pass through the centerline of the burner
nozzle.
LIF signals of OH emission at wavelength around 313 nm