Double-pulsed time differential holographic interferometry
- 1 January 1977
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 16 (1) , 229-232
- https://doi.org/10.1364/ao.16.000229
Abstract
A unique method for double-pulsed holographic interferometry has been developed and employed in a meter-long theta-pinch experiment. Q-switching of two orthogonally polarized ruby laser beams, using the same lasing medium but different laser cavities, allows pulse separations of 0.2–100 μsec. The double-pulse operation with short pulse separation avoids many temporal aberrations seen in single-pulse systems and allows time differential interferograms of transient phenomena such as seen in theta-pinch plasmas. Orthogonal polarization of the two beams permits background fringe construction without the need for a mechanically introduced planar phase shift.Keywords
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