26 November 2001 Temporally and spatially resolved diagnostics of nonstationary flames using a kHz disk laser: an intermediate report
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Abstract
A diagnostic system using a kHz solid state laser is under development. The system combines a high power diode pumped solid sate laser system as excitation source with an intensified fast scan camera system. The Yb:YAG disk laser oscillator and a regenerative amplifier generate tunable radiation, spectrally narrowed to $DELTA(lambda) < 5 pm, which will be converted by nonlinear crystal into the VIS and the UV spectral ranges. The excitation of the planar laser induced fluorescence of selected molecules and radicals at wavelengths inside the discussed spectral ranges is demonstrated in preparatory experiments. Examples are the OH radical, NO and formaldehyde molecules excited by a frequency doubled dye laser. From these experiments the needed pulse energies of the solid state laser system for light sheet shaping are derived. The system is under development for investigations of combustion processes under reduced gravity at drop tower Bremen, during parabolic flights and at the ISS.
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Dieter Grebner, Dirk Mueller, Wolfgang Triebel, Jens Koenig, "Temporally and spatially resolved diagnostics of nonstationary flames using a kHz disk laser: an intermediate report", Proc. SPIE 4448, Optical Diagnostics for Fluids, Solids, and Combustion, (26 November 2001); doi: 10.1117/12.449378; https://doi.org/10.1117/12.449378
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