We describe a new optoacoustic technique for liquids that utilizes a quartz cuvette to contain the sample and an externally coupled piezoelectric transducer for gated detection of the optoacoustic signal produced by a pulsed dye laser. Such a technique is characterized by ultimate corrosion resistance, absence of contamination of the sample, and ease of sample change. With this technique, we measure quantitatively the weak absorption profiles that are due to the sixth harmonic of the C—H stretch in a series of halogen- and methyl-substituted benzenes. Also, optoacoustic spectra of ions dissolved in a strong acid (H2SO4) are observed for the first time.
© 1980 Optical Society of America
A. C. Tam and C. K. N. Patel, "Ultimate corrosion-resistant optoacoustic cell for spectroscopy of liquids," Opt. Lett. 5, 27-29 (1980)