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M. D. ZIDAN1,* , A. W. ALLAF2, A. ALLAHAM1, A. AL-ZIER2
- Department of Physics, Atomic Energy Commission, P. O. Box 6091, Damascus, Syria
- Department of Chemistry, Atomic Energy Commission, P. O. Box 6091, Damascus, Syria
We report the observation of the far field self-diffraction rings patterns in Poly(azaneylylidene-acylene) "DAZA" polymer under the influence of the dual laser beams. The incident pump laser beam was varied as: 10mW, 20mW, 30mW, 40mW and 50mW in order to study the effect of the laser power on the number of the rings. Also, the difference between the ring shapes in both sides with respect the beam curvature was observed. The Fresnel-Kirchhoff diffraction formula was applied to perform simula-tion of the self-diffraction rings patterns with different laser power used as a pump power at two sample positions before and after beam focal point with respect to the geometrical pumping. Our results are in good agreements between the experimental data and the propose model based on the Fresnel-Kirchhoff diffraction formula..
Diffraction ring patterns, Poly(azaneylylidene-acylene), Nonlinear optical properties, Fresnel-Kirchhoff theory, Spatial cross-phase modulation.
Submitted at: April 3, 2023
Accepted at: Oct. 6, 2023
M. D. ZIDAN, A. W. ALLAF, A. ALLAHAM, A. AL-ZIER, Observation of the far field diffraction patterns of divergent and convergent probe laser beam in DAZA polymer, Journal of Optoelectronics and Advanced Materials Vol. 25, Iss. 9-10, pp. 438-443 (2023)
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