A simple effective photoacoutic probe employing the acoustic waveguide effect in quartz substrate is described. The photoacoustic probe consists of a quartz rod to the upper end of which a PZT-5A piezoelectric ceramic disk is attached. The probe was used in the acquisition of a dye-laser-excited photoacoustic spectrum of 10-μg/ml 9,10-dimethylanthracene in ethanol at room temperature. With the probe system, the spectrum was found to be essentially identical with the corresponding spectra obtained with a standard cuvette cell/attached PZT disk and a cylindrical cell/attached PZT tube detection systems; the observed relative sensitivities were 1.6:1.0:4.4, respectively.
© 1982 Optical Society of America
Original Manuscript: May 3, 1982
Published: September 1, 1982
E. P. C. Lai, E. Voigtman, and J. D. Winefordner, "Photoacoustic probe for spectroscopic measurements in condensed matter: convenient and corrosion-resistant," Appl. Opt. 21, 3126-3128 (1982)