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Proceedings Paper

Impedance spectroscopy for measuring low optical absorption coefficients of nonlinear optical crystals
Author(s): Aleksey V. Pigarev; Aleksey V. Konyashkin; Oleg A. Ryabushkin
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Paper Abstract

Novel piezoelectric resonance laser calorimetry technique, based on impedance spectroscopy, is introduced for measuring low optical absorption coefficients of nonlinear-optical crystals. This method exploits dependence of crystal piezoelectric resonance frequencies on its temperature. Nonuniform temperature of the crystal heated by laser radiation is characterized by equivalent temperature that is directly determined by measuring frequency shift of certain piezoelectric resonance calibrated on temperature. Kinetics of crystal equivalent temperature during its interaction with laser radiation is obtained by measuring frequency kinetics of piezoelectric resonance. It is demonstrated that optical absorption coefficient can be determined from the linear slope of initial part of temperature kinetics. Basing on experiments with LiB3O5 and LiNbO3 crystals it was proved that values of optical absorption coefficients determined from initial part and full time kinetics of equivalent temperature have almost the same values.

Paper Details

Date Published: 27 April 2016
PDF: 7 pages
Proc. SPIE 9894, Nonlinear Optics and its Applications IV, 98941T (27 April 2016); doi: 10.1117/12.2227731
Show Author Affiliations
Aleksey V. Pigarev, Moscow Institute of Physics and Technology (Russian Federation)
Aleksey V. Konyashkin, Moscow Institute of Physics and Technology (Russian Federation)
Kotelnikov Institute of Radioengineering and Electronics (Russian Federation)
Oleg A. Ryabushkin, Moscow Institute of Physics and Technology (Russian Federation)
Kotelnikov Institute of Radioengineering and Electronics (Russian Federation)


Published in SPIE Proceedings Vol. 9894:
Nonlinear Optics and its Applications IV
Benjamin J. Eggleton; Neil G. R. Broderick; Alexander L. Gaeta, Editor(s)

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