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Title:
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Simultaneous determination of nonlinear optical and thermo-optic parameters of liquid samples |
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Author:
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Santhi, A; Vinu V, Namboodiri; Radhakrishnan, P; Nampoori, V P N
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Abstract:
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The authors apply the theory of photothermal lens formation and also that of pure optical nonlinearity to account for the phase modulation in a beam as it traverses a nonlinear medium. It is used to simultaneously determine the nonlinear optical refraction and the thermo-optic coefficient. They demonstrate this technique using some metal phthalocyanines dissolved in dimethyl sulfoxide, irradiated by a Q-switched Nd:YAG laser with 10 Hz repetition rate and a pulse width of 8 ns. The mechanism for reverse saturable absorption in these materials is also discussed. |
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URI:
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http://dyuthi.cusat.ac.in/purl/2575
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Date:
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2006 |