Nonlinear refraction and absorption spectra of GaP crystal measurements for all-optical switches figure-of-merit determination

R. M. Moysés; L. Misoguti

doi:10.1117/12.2650493

15 March 2023 Nonlinear refraction and absorption spectra of GaP crystal measurements for all-optical switches figure-of-merit determination

R. M. Moysés, L. Misoguti

Author Affiliations +

Proceedings Volume 12419, Ultrafast Phenomena and Nanophotonics XXVII; 124190L (2023) https://doi.org/10.1117/12.2650493
Event: SPIE OPTO, 2023, San Francisco, California, United States

Conference Poster

Abstract

Measuring the material’s third-order nonlinear optical refraction (NLR) and absorption (NLA) spectra over a broad wavelength range remains challenging and time consuming. Nevertheless, it is crucial to know these spectra to establish the material’s potential for photonic applications, the best spectral range for a specific application, etc. GaP is an important nonlinear material which its NLR and NLA still not fully determined over a broad wavelength range for all-optical switching (AOS) applications, for instance. Here, we have determined the figure-of-merit (FOM) spectrum of a GaP crystal (100-cut) for ultrafast AOS applications based on its nonlinear properties. Using ultrafast laser pulses from an optical parametric amplifier, we performed openaperture Z-scan measurements associate to the nonlinear ellipse rotation (NER) effect to determine simultaneously the NLR and NLA spectra. In addition, besides its wavelength dependence, we measured the FOM as a function of the crystal orientation. We observed that the crystal orientation is very critical to attains high or low FOM values.

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R. M. Moysés and L. Misoguti "Nonlinear refraction and absorption spectra of GaP crystal measurements for all-optical switches figure-of-merit determination", Proc. SPIE 12419, Ultrafast Phenomena and Nanophotonics XXVII, 124190L (15 March 2023); https://doi.org/10.1117/12.2650493

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