Abstract

We use the recently developed technique of pulsed dye-laser optoacoustic spectroscopy of liquids to study the weak 607-nm absorption band of benzene dissolved in various concentrations CCl₄. The technique involves the use in of submersed piezoelectric transducer and gated detection of the transient acoustic signal. With increasing dilution, the peak of the 607-nm band is observed to be more blue-shifted, and the linewidth and asymmetry of the band decrease. We verify that the present technique can detect absorption coefficients of 10⁻⁶ cm⁻¹ and absorbed energy of 10⁻⁹ J. With these high sensitivities, we show that nonlinear optical processes such as multiphoton absorption and stimulated Raman scattering in liquids should be readily observable with our optoacoustic method.

© 1979 Optical Society of America

Ultimate corrosion-resistant optoacoustic cell for spectroscopy of liquids

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