14 May 2018 Piezoelectric resonance spectroscopy for measuring surface temperature distribution of optical materials interacting with laser radiation
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Abstract
We propose a novel technique for measuring the surface temperature distribution of optical elements interacting with high power laser radiation. This technique is based on measuring the temperature sensitive piezoelectric resonance frequencies of nonlinear-optical crystals that are transparent at involved laser radiation wavelengths. Using small thermoresonators made of lithium niobate (LiNbO3) crystals the kinetics of the surface temperature distribution of the silica lens heated by 11W CW laser radiation at 1064 nm was measured. Modeling of the experiment results reveal the optical absorption coefficient of the lens to be 6×10-5 cm-1.
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N. Kovalenko, N. Kovalenko, G. Aloian, G. Aloian, I. Shebarshina, I. Shebarshina, A. Konyashkin, A. Konyashkin, O. Ryabushkin, O. Ryabushkin, } "Piezoelectric resonance spectroscopy for measuring surface temperature distribution of optical materials interacting with laser radiation", Proc. SPIE 10684, Nonlinear Optics and its Applications 2018, 106841S (14 May 2018); doi: 10.1117/12.2306678; https://doi.org/10.1117/12.2306678
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