Optical Diagnostics
An important element of the OSU program in nonequilibrium thermodynamics is the extensive integration of advanced laser-based optical diagnostics, which provides our students with a unique set of experimental tools. As an example, we are in the process of developing a MHz repetition rate flow imaging system, which allows one, for the first time, to capture planar images of turbulent and unsteady supersonic flow phenomena in real time.
Other diagnostic systems available for student research include: Molecular Tagging Velocimetry (MTV) for microscale flows; spectrally filtered Raman/Thomson scattering; Two-Photon Absorption Laser Induced Fluorescence (TALIF); step-scan Fourier transform infrared spectroscopy; spontaneous Raman spectroscopy; UV, visible, and IR emission spectroscopy; and Schlieren photography.
Major laser / optical systems include: multiple pulsed Nd:YAG lasers, pulsed Titanium:Sapphire Laser, single frequency external cavity diode laser, tunable excimer laser, multiple Fourier transform infrared spectrometers, multiple Optical Multichannel Analyzer (OMA) systems, scientific and intensified CCD cameras.
Other diagnostic systems available for student research include: Molecular Tagging Velocimetry (MTV) for microscale flows; spectrally filtered Raman/Thomson scattering; Two-Photon Absorption Laser Induced Fluorescence (TALIF); step-scan Fourier transform infrared spectroscopy; spontaneous Raman spectroscopy; UV, visible, and IR emission spectroscopy; and Schlieren photography.
Major laser / optical systems include: multiple pulsed Nd:YAG lasers, pulsed Titanium:Sapphire Laser, single frequency external cavity diode laser, tunable excimer laser, multiple Fourier transform infrared spectrometers, multiple Optical Multichannel Analyzer (OMA) systems, scientific and intensified CCD cameras.
A recent presentation gives an overview of our recent advances in this field:
Optical Diagnostics in Weakly Ionized Plasmas (by Walter R. Lempert): presented to Aerodynamic Measurement Technology Technical Committee, 45th AIAA Aerospace Sciences Meeting