Abstract

Holographic interferometry measurements have been performed on high-speed, high-temperature gas flows with a laser output tuned near a resonant sodium transition. The technique allows the detection and quantification of the sodium concentration in the flow. By controlling the laser detuning and seeded sodium concentration, we performed flow visualization in low-density flows that are not normally detectable with standard interferometry. The technique was also successfully used to estimate the temperature in the boundary layer of the flow over a flat plate.

© 2003 Optical Society of America

Near-resonant holographic interferometry and absorption measurements of seeded atomic species in a flame

Alexis I. Bishop, Timothy J. McIntyre, Bradley N. Littleton, and Halina Rubinsztein-Dunlop
Appl. Opt. 43(17) 3391-3400 (2004)

OH concentration and temperature measurements by use of near-resonant holographic interferometry

Alexis I. Bishop, Timothy J. McIntyre, Bradley N. Littleton, and Halina Rubinsztein-Dunlop
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Simultaneous two-wavelength holographic interferometry in a superorbital expansion tube facility

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Diode-laser-based near-resonantly enhanced flow visualization in shock tunnels

Robert Hruschka, Sean O'Byrne, and Harald Kleine
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Flow visualization of Bénard convection using holographic interferometry

Masahiro Ueda, Kiichiro Kagawa, Koichi Yamada, Chiyozo Yamaguchi, and Yoshifumi Harada
Appl. Opt. 21(18) 3269-3272 (1982)