16 December 2004 Nonlinear optical properties of Congo red in aqueous solution and PVA film
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Abstract
The absorption spectra of Congo red (CR) in aqueous solution and PVA film are measured, respectively. With the Z-scan method, the nonlinear optical properties of CR are investigated, and experimental data on the nonlinear refractive index and the change of refractive index are obtained. As a result, the intensity dependent index n2 of CR has been determined to be in the range from 10-10 to 10-9 m2/W. The nonlinear absorption of CR aqueous film and CR-doped PVA film for three wavelengths is measured respectively. Under the condition of that the two samples are irradiated by 443nm or 535nm, the characteristics of absorption as function of the power of 633nm are determined. Finally, the experimental results are analyzed.
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Shengwen Qi, Shengwen Qi, Chunping Zhang, Chunping Zhang, Xiuqin Yang, Xiuqin Yang, Kuan Chen, Kuan Chen, Lianshun Zhang, Lianshun Zhang, } "Nonlinear optical properties of Congo red in aqueous solution and PVA film", Proc. SPIE 5621, Optical Materials in Defence Systems Technology, (16 December 2004); doi: 10.1117/12.569563; https://doi.org/10.1117/12.569563
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