31 August 2009 Sensitive measurement of rotational lifetime of toluene using time-resolved 4ƒ imaging technique
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Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 73824D (2009) https://doi.org/10.1117/12.835669
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China
Abstract
Using time-resolved pump-probe system based on nonlinear image technique with phase object, we determine the rotational lifetime of toluene with 19-ps laser pulse at 532 nm. The system can be applied to both degenerate and non-degenerate beams in any polarization states. The proposed method is advantageous and imposes a lower stress in the cases of fragile materials, since a single shot of laser pulse is enough for the definition of their nonlinear refractive indices and absorption coefficients. Advantages of this scheme are relative ease of producing the steady probe beam with top-hat profile. The coupling theory of the pump beam and the probe beam in perpendicular linear polarizations states is used to interpret the experimental results. With the help of coupling equations we numerically fitted our experimental results. Good agreement is obtained between the theory and the experiment. Additionally, we derive the rotational lifetime of toluene τrot=4.8 ps with the help of theoretical fit.
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Xiao Jin, Min Shui, "Sensitive measurement of rotational lifetime of toluene using time-resolved 4ƒ imaging technique", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73824D (31 August 2009); doi: 10.1117/12.835669; https://doi.org/10.1117/12.835669
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