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Pulsed photoacoustic technique to study nonlinear processes in liquids: Results in toluene
C V Bindhu S S Harilal Riju C Issac Geetha K Varier V P N Nampoori C P G Vallabhan
Volume 44 Issue 3 March 1995 pp 231-235
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Keywords
Photoacoustics ;multiphoton phenomena -
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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Author Affiliations
C V Bindhu1 S S Harilal1 Riju C Issac1 Geetha K Varier1 V P N Nampoori1 C P G Vallabhan1
- Laser Division, School of Photonics, Cochin University of Science and Technology, Cochin - 682 022, India
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Dates
- Published
- March 1995
- Manuscript received
- 11 July 1994
- Manuscript revised
- 12 December 1994
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Pramana – Journal of Physics
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