Laser applications and system components

Modulation piezoelectric resonance laser calorimetry for precision measurement of optical absorption kinetics in nonlinear optical crystals

N. V. Kovalenko, A. V. Konyashkin, R. I. Shaidullin, K. Kartashov, S. V. Dolgolenok, A. V. Vorob'ev, O. A. Ryabushkin

Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences

Abstract: We report the method of modulation piezoelectric resonance laser calorimetry (MPLC) for studying the interaction of nonlinear optical crystals with laser radiation. The kinetics of the crystal heating power is measured during laser radiation propagation, and the method is based based on periodic irradiation of the sample and the isolation of the amplitude of its equivalent temperature oscillations. The theoretical justification for the MPLC technique and its approbation was performed by studying LBO crystal degradation under UV irradiation.

Keywords: lithium triborate, laser calorimetry, piezoelectric resonance, optical absorption, degradation, UV radiation.

Received: 26.02.2025
Revised: 27.02.2025
Accepted: 10.04.2025

 English version: Quantum Electronics, 2025, 52:suppl. 7, S775–S782