Abstract

The traveling thermal lens technique is a new all-optical method for probing concentration and velocity patterns in flowing media. A thermal lens created by absorption of a short laser pulse moves with the flow and can be probed by a cw laser beam further downstream as a deflection signal. This technique permits optical measurements of the flow-velocity component perpendicular to the probe laser at high spatial resolution. Its application requires no seeding with particulates, as is needed in most other optical techniques.

© 1985 Optical Society of America

Time-resolved crossed-beam thermal lens measurement as a nonintrusive probe of flow velocity

Wayne A. Weimer and Norman J. Dovichi
Appl. Opt. 24(18) 2981-2986 (1985)

Application of photothermal deflection technique to flow-velocity measurements in a flame

A. Rose and R. Gupta
Opt. Lett. 10(11) 532-534 (1985)

Gas velocity measurements using photothermal deflection spectroscopy

Jeffrey A. Sell
Appl. Opt. 24(22) 3725-3735 (1985)

Two-frequency laser-induced fluorescence technique for rapid velocity-field measurements in gas flows

B. Hiller and R. K. Hanson
Opt. Lett. 10(5) 206-208 (1985)

Time-resolved temperature measurements in a laboratory flame using the optoacoustic beam-deflection method

Dennis F. Grosjean, Benjamin Sarka, and Larry P. Goss
Opt. Lett. 10(7) 324-326 (1985)