Abstract

Light scattering from laser-induced electrostrictive gratings has been used for simultaneous, instantaneous, nonintrusive, and remote measurements of temperature and velocity in a submerged air jet. We accomplished phase-sensitive detection of scattered light by superimposing two signal beams whose frequencies were Doppler shifted by the movement of the grating. Temperatures in the range 295–600 K and flow velocities in the range $10–100 \mathrm{m}/\mathrm{s}$ were measured.

© 2000 Optical Society of America

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