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Absorption band saturation in the near-IR spectrum of molybdenum blue

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Abstract

Nonlinear absorption of a picosecond laser pulse in an aqueous solution of a partly reduced heptamolybdate and citric acid was studied. We report on the first observations of the absorption band saturation in the near-IR spectrum of molybdenum blue and its relaxation on a picosecond time scale. A stepwise character of the intensity dependence of the absorption band saturation is demonstrated. Qualitative interpretation of the experimental results is based on the concept of self-defocusing in a three-level system that exhibits two-photon transitions via an intermediate level upon high-power excitation.

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Authors and Affiliations

  1. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia

    A. A. Bugaev & S. E. Nikitin

Authors
  1. A. A. Bugaev
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  2. S. E. Nikitin
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 26, No. 14, 2000, pp. 91–96.

Original Russian Text Copyright © 2000 by Bugaev, Nikitin.

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Bugaev, A.A., Nikitin, S.E. Absorption band saturation in the near-IR spectrum of molybdenum blue. Tech. Phys. Lett. 26, 634–636 (2000). https://doi.org/10.1134/1.1262938

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  • DOI: https://doi.org/10.1134/1.1262938

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