25 September 2013 Piezoelectric resonance calorimetry of nonlinear-optical crystals under laser irradiation
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Novel method is proposed for determination of nonlinear-optical crystal both heat transfer and optical absorption coefficients by measuring kinetics of the laser-irradiated crystal temperature-dependent piezoelectric resonance frequency. When laser radiation propagates through the crystal its temperature evaluation with time is directly determined from crystal piezoelectric resonance frequency shift, which is precisely measured by analyzing crystal response to the applied ac electric voltage. Heat transfer and optical absorption coefficients are obtained using measured characteristic time of crystal laser heating kinetics by solving nonstationary heat conduction equation. Experiments were performed with nonlinear-optical α-quartz, lithium triborate (LBO) and periodically poled lithium niobate (PPLN) crystals.
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Oleg A. Ryabushkin, Oleg A. Ryabushkin, Aleksey V. Konyashkin, Aleksey V. Konyashkin, Daniil V. Myasnikov, Daniil V. Myasnikov, Valentin A. Tyrtyshnyy, Valentin A. Tyrtyshnyy, Oleg I. Vershinin, Oleg I. Vershinin, "Piezoelectric resonance calorimetry of nonlinear-optical crystals under laser irradiation", Proc. SPIE 8847, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VII, 88470Q (25 September 2013); doi: 10.1117/12.2023285; https://doi.org/10.1117/12.2023285

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