Estimation of the nonlinear-optical coefficient of GaSe:S crystals according to electro-optical measurements

Olesya N. Shevchenko; Nazar A. Nikolaev; Valery D. Antsygin

doi:10.1117/12.3009853

2 November 2023 Estimation of the nonlinear-optical coefficient of GaSe:S crystals according to electro-optical measurements

Olesya N. Shevchenko, Nazar A. Nikolaev, Valery D. Antsygin

Author Affiliations +

Proceedings Volume 12920, XVI International Conference on Pulsed Lasers and Laser Applications; 129200G (2023) https://doi.org/10.1117/12.3009853
Event: XVI International Conference on Pulsed Lasers and Laser Applications, 2023, Tomsk, Russian Federation

Abstract

Based on electro-optical measurements in the THz region and comparison with data from other authors, estimates of the nonlinear optical coefficient of GaSe crystals with varied degrees of sulfur doping are provided. The d22 value for GaSe was 13.9 pm/V at a laser wavelength of 1.55 microns. The acquired data are compared with the values of nonlinear coefficients for undoped GaSe samples provided in the works of other authors. The qualitative correspondence of experimental measurements of the nonlinearity coefficient and the empirical model based on Miller's rule in the range of 0.63 – 1.55 microns is shown. The inaccuracy of theoretical curve in comparison to the experimental one is around 10%. The techniques described in the paper for calculating the nonlinear optical coefficient's magnitude and the results obtained will make it possible to establish the foundation for the creation of radiophotonics devices based on unalloyed and sulfur-doped GaSe crystals.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Olesya N. Shevchenko, Nazar A. Nikolaev, and Valery D. Antsygin "Estimation of the nonlinear-optical coefficient of GaSe:S crystals according to electro-optical measurements", Proc. SPIE 12920, XVI International Conference on Pulsed Lasers and Laser Applications, 129200G (2 November 2023); https://doi.org/10.1117/12.3009853

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