Numerical calculation of Z-scan measurements for nonlinear media with large phase shift

We have reported the characteristics of a Z-scan for the poly(azaneylylidene-acylene) (DAZA) polymer, as nonlinear medium with a large nonlinear phase shift using continuous-wave (CW) laser beam. It has been verified that the Fresnel diffraction model is applicable for analyses of Z-scan measurement...

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Bibliographic Details
Published in:Optoelectronics letters 2024-03, Vol.20 (3), p.177-182
Main Authors: Zidan, M. D., Allahham, A.
Format: Article
Language:English
Subjects:
Continuous radiation
Fresnel diffraction
Laser beams
Lasers
Luminous intensity
Optical Devices
Optics
Phase shift
Photonics
Physics
Physics and Astronomy
Polymers
Wave diffraction
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Summary:We have reported the characteristics of a Z-scan for the poly(azaneylylidene-acylene) (DAZA) polymer, as nonlinear medium with a large nonlinear phase shift using continuous-wave (CW) laser beam. It has been verified that the Fresnel diffraction model is applicable for analyses of Z-scan measurements with DAZA polymer at high laser power. It was found that Z-scan curves with peak-to-valley features appear as the applied light intensity increases in the case of a large nonlinear phase shift. The Z-scan experiments were carried out using a CW laser to verify the theoretical calculations in the case of a large nonlinear phase shift model. Our results show good agreements between the experimental data and the proposed theoretical models.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-024-3123-4