Nonlinear optical properties of Congo red in aqueous solution and PVA film

Shengwen Qi; Chunping Zhang; Xiuqin Yang; Kuan Chen; Lianshun Zhang

doi:10.1117/12.569563

16 December 2004 Nonlinear optical properties of Congo red in aqueous solution and PVA film

Shengwen Qi, Chunping Zhang, Xiuqin Yang, Kuan Chen, Lianshun Zhang

Proceedings Volume 5621, Optical Materials in Defence Systems Technology; (2004) https://doi.org/10.1117/12.569563
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

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.

Citation Download Citation

Shengwen Qi, Chunping Zhang, Xiuqin Yang, Kuan Chen, and 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); https://doi.org/10.1117/12.569563

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