Experimental and Theoretical Study of the Laser Induced Diffraction Pattern in the Acid Orange 10 Dye: Polyacrylamide Gel | ||
| Journal of Basrah Researches (Sciences) | ||
| Article 1, Volume 39, Issue 2, June 2013, Pages 1-12 PDF (0 K) | ||
| Authors | ||
| ; Y. Al-Ahmad; Hassan A. Sultan; Hussain A. Badran; Chsib Meshari | ||
| Abstract | ||
| We observed and studied diffraction rings generated in an Acid Orange 10 dye doped Polyacrylamide gel (AO10: PAA gel) using cw visible laser beam. The number of rings increases almost exponentially with increasing input power and concentration of the samples. The refractive index change, ∆n, effective nonlinear refractive index, n2, variation of thermo-optic coefficient ,dn/dT, figure of merit ,W, and thermal figure of merit ,H, are found to be 0.004788 , 10-5 cm2/Watt, 1.01×10-4 1/oC, 13.7 and 0.45×10-4 respectively. The effective nonlinear refractive index, n2, was determined based on the observed number of rings. This large nonlinearity is attributed to a thermal effect. Theoretical diffraction patterns that agree well with experimental one are generated using a wave theory. | ||
| Keywords | ||
| Nonlinearity; thermal effect; Wave theory | ||
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