Threshold effect in properties of limiters for high-intensity laser radiation

Mikhail S. Savelyev; Alexander Yu. Gerasimenko; Ulyana E. Kurilova; Vitaly M. Podgaetsky; Sergey A. Tereshchenko; Sergey V. Selishchev

doi:10.1117/12.2303498

16 April 2018 Threshold effect in properties of limiters for high-intensity laser radiation

Mikhail S. Savelyev, Alexander Yu. Gerasimenko, Ulyana E. Kurilova, Vitaly M. Podgaetsky, Sergey A. Tereshchenko, Sergey V. Selishchev

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Proceedings Volume 10614, International Conference on Atomic and Molecular Pulsed Lasers XIII; 106141O (2018) https://doi.org/10.1117/12.2303498
Event: XIII International Conference on Atomic and Molecular Pulsed Lasers, 2017, Tomsk, Russia

Abstract

Creation of limiters for intensive laser radiation requires the development of effective methods for testing materials to determine the nonlinear optical parameters characterizing their properties. The limiting threshold, linear and nonlinear absorption coefficients can be determined not only from data of Z-scan with open aperture, but also with the help of a fixed location of the limiter. The use of this method makes it possible to determine the output characteristic of the studied material from which nonlinear optical parameters can be calculated. Characteristics of carbon nanotubes and graphene oxide in water were obtained with the fixed location of the limiter. The experiments were performed using an Nd:YAG laser that generates pulses of 16 ns duration at a wavelength of 532 nm with the linearly polarized laser beam in the horizontal plane and a shape closed to Gaussian type. Theoretical curves for method of fixed location of the sample according to threshold model was calculated and compared with the experimental data. Normalized weakening coefficients, limiting threshold, linear and nonlinear absorption coefficients were found for studied dispersions and calculation of Z-scan with open aperture was made. The value of normalized weakening coefficient was higher in dispersed medium of SWСNTs with water (K_norm≈20) in comparison with oxide graphene in water (K_norm≈14). The dependences of normalized weakening coefficient bias input energy were approximately linear in both cases.

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Mikhail S. Savelyev, Alexander Yu. Gerasimenko, Ulyana E. Kurilova, Vitaly M. Podgaetsky, Sergey A. Tereshchenko, and Sergey V. Selishchev "Threshold effect in properties of limiters for high-intensity laser radiation", Proc. SPIE 10614, International Conference on Atomic and Molecular Pulsed Lasers XIII, 106141O (16 April 2018); https://doi.org/10.1117/12.2303498

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KEYWORDS

Absorption

Data modeling

Graphene

Nonlinear optics

Water

Carbon nanotubes

Nanomaterials

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