Pulsed photoacoustic technique to study nonlinear processes in liquids: Results in toluene |
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| Authors: | C V Bindhu S S Harilal Riju C Issac Geetha K Varier V P N Nampoori C P G Vallabhan |
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| Institution: | (1) Laser Division, School of Photonics, Cochin University of Science and Technology, 682 022 Cochin, India |
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| Abstract: | Pulsed photoacoustic measurements have been carried out in toluene at 532 nm wavelength using a Q-switched frequency doubled
Nd:YAG laser. The variation of photoacoustic signal amplitude with incident laser power indicates that at lower laser powers
one photon absorption takes place at this wavelength while a clear two photon absorption occurs in this liquid at higher laser
powers. The studies made here demonstrate that pulsed photoacoustic technique is simple and effective for the investigation
of multiphoton processes in liquids. |
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| Keywords: | Photoacoustics multiphoton phenomena |
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