The Rosencwaig-Gersho equation for the photoacoustic signal is recast in a manner that emphasizes the crucial role thermal wave interference plays in the production of the photoacoustic signal. This formalism is then used to suggest a technique for extracting thermal information from the structure in the photoacoustic signal resulting from thermal wave interference. Experimental measurements illustrating this technique are presented.
© 1982 Optical Society of America
C. A. Bennett, Jr. and R. R. Patty, "Thermal wave interferometry: a potential application of the photoacoustic effect," Appl. Opt. 21, 49-54 (1982)