Z-scan determination of the third-order optical nonlinearities of an azo dye using diode-pumped Nd:Yag laser |
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Authors: | C Gayathri A Ramalingam |
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Institution: | aDepartment of Physics, Centre for Laser Technology, Anna University, Chennai 600 025, India |
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Abstract: | Optical nonlinearity of dye solutions are studied with considerable interest for their wide spread applications ranging from gain media in lasers to all-optical processing signal devices. The third-order nonlinear optical properties of Brilliant Crocein dye was measured by the Z-scan technique and measurements were carried out for different concentrations. The negative sign of the nonlinear refractive index n2 indicates that this material exhibits self-defocusing optical nonlinearity and purely saturation absorption at the wavelength 532 nm of the diode-pumped Nd:YAG. These results show that Brilliant Crocein has potential applications in nonlinear optics. |
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Keywords: | Z-scan Nonlinear refraction index Nonlinear absorption Nonlinear materials Azo dye |
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