Maximizing the signal in nonlinear beam-deflection technique

Sanaz Faryadras; Eric Van Stryland; David Hagan

doi:10.1117/12.2685217

24 November 2023 Maximizing the signal in nonlinear beam-deflection technique

Sanaz Faryadras, Eric Van Stryland, David Hagan

Author Affiliations +

Proceedings Volume PC12726, Laser-Induced Damage in Optical Materials 2023; PC1272616 (2023) https://doi.org/10.1117/12.2685217
Event: SPIE Laser Damage, 2023, Dublin/Livermore, California, United States

Conference Poster

Abstract

Nonlinear index of refraction is of great importance in evaluation of laser-induced damage threshold, as it relates to parameters defining self-focusing critical power and avalanche breakdown. An accurate method to measure the nonlinear refraction can help restrict the damage caused by these mechanisms. Beam-Deflection (BD) method is a useful tool to calculate nonlinear refractive index. The critical parameters in the calculations are probe-to-excitation spot size ratio, r, and the relative displacement of the two overlapping beams. Similar to the Z-Scan method, an empirical function, solely dependent on r, is obtained which provides a relation between the BD signal and the phase shift.

Citation Download Citation

Sanaz Faryadras, Eric Van Stryland, and David Hagan "Maximizing the signal in nonlinear beam-deflection technique", Proc. SPIE PC12726, Laser-Induced Damage in Optical Materials 2023, PC1272616 (24 November 2023); https://doi.org/10.1117/12.2685217

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