Abstract
A criterion is proposed for determining laser breakdown in nonlinear optical crystals, based on measuring the absorption coefficient of optical radiation. A possibility of using a Pierce oscillator is demonstrated to determine the optical absorption coefficient in real time. The proposed criterion is applied to find the optical damage threshold of a lithium niobate crystal, which is 500 mJ/cm2, taking into account the self-focusing effect.
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The work was performed within the framework of state assignment no. FFWZ-2022-0004 “Space-2.”
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Translated by I. Ulitkin
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Zotov, K., Tereshchenko, N., Ostapiv, A. et al. A New Criterion for Determining Optical Damage of Nonlinear Optical Crystals, Based on the Use of an RF Oscillator Circuit. Bull. Lebedev Phys. Inst. 51 (Suppl 1), S51–S57 (2024). https://doi.org/10.3103/S1068335624600165
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DOI: https://doi.org/10.3103/S1068335624600165