ABSTRACT In this paper the results from investigations of the nonlinear refractive index and nonlinear absorption coefficient of Bromophenol Blue using the Z-scan technique with a continuous wave laser beam at wavelengths 488 nm and 514 nm are presented. It was observed that the material exhibited reverse saturation absorption and self defocusing behavior. It was found that the increase in solution concentration resulted in linear increase of the nonlinear refractive index. A pump and probe technique was used to obtain the absorption spectrum of triplet state. Furthermore the nonlinear absorption effect was used to demonstrate all optical switching.
Cite this paper
Henari, F. (2011) Nonlinear characterization and optical switching in bromophenol blue solutions. Natural Science, 3, 728-732. doi: 10.4236/ns.2011.38096.
 Nalwa, H.S. and Miyata, S. (1997) Nonlinear Optics of Organic molecules and Polymers, Chemical Rubber Company, Florida.
 Tutt, L.W. and Kost, A. (1992) optical limiting performance of C-60 and C-70 solutions, Nature, 356, 225.
 Henari, F.Z. (2001) Optical switching in organometallic phthaylocyanine, Journal Optics A: Pure Applied Optics, 3, 188-190. doi:10.1088/1464-4258/3/3/306
 Huang T., Hao, Z., Gong, Liu, H.Z., Xiao S., Li, S., zhai, Y., You, S., Wang, Q. and Qin J. (2008) Third-order nonlinear optical properties of a new copper coordination compound: A promising candidate for all-optical switching Chem, Physical Letters, 452, 213-217.
 Ogusu, K., Yamasaki, J., Maeda, S., Kitao, M. and Minakata, M. (2004) Linear and nonlinear optical properties of Ag-As-Se chalcogenide glasses for all-optical switching, Optics Letters, 29, 265-267.
 Prasad, P.N. and Williams, D.J. (1991) Introduction to Nonlinear Optical Effects in Molecules and polymers, Wiley-Interscience, NewYork.
 Agrawal, G.P. (1989) Nonlinear Fibre Optics, Academic Press, Boston.
 Xiujuan J, Qi, G., Huagang L. and Wei H. (2004) Induced focusing from counter-propagation of two optical beams in self-defocusing media, Optics Communications, 233, 1-6. doi:10.1016/j.optcom.2004.01.014
 Sheik-Bahae M., Said A.A, Wei T.H. and Hagan D.J. (1990) Sensitive measurement of optical nonlinearities using a single beam, IEEE Journas ofl Quant Electronic, 6, 760-769. doi:10.1109/3.53394
 Qureshi, F.M., Martin, S.J., Long, X., Bradley, D.D.C., Henari, F.Z., Blau, W.J.; Smith, E.C., Wang, C.H., Kar, A. K. and Anderson, (1998) Optical limiting properties of a zinc porphyrin polymer and its dimer and monomer model compounds, Chemical Physical, 231, 87-94.
 Geethakrishnan, T. and Palanisamy, P.K. (2007) Z-scan determination of the third-order optical nonlinearity of a triphenylmethane dye using 633 nm He-Ne laser, Optics Communications, 270, 424-428.
 Ghaleh, K.J., Salmani, S. and Ara, M.H.M. (2007) Non-
linear responses and optical limiting behaviour of fast green FCF dye under a low power CW He-Ne laser irradiation, Optics Communications, 271, 551-554.
 Henari, F.Z., MacNamara, S., Stevenson, O., Callaghan, J., Weldon, D. and Blaue, W. (1993) Low power nonlinear optical response of C60 and C70 fullerene solutions Adv Mater, 5, 930-934. doi:10.1002/adma.19930051212
 Rekha, R.K. and Ramalingam, A. (2009) Nonlinear characterization and optical limiting effect of carmine dye, Indian Journals of Science and Technology, 2, 27-31.
 Khoo, I.C. (1995) Liquid crystals physical properties and nonlinear optical phenomena, (Wiley, New York).
 Gomez, S.L., Cuppo, F.L.S. and Figueiredo Neto, A.M. (2003) Nonlinear optical properties of liquid crystals probed by z-scan, Brazilian Journal of Physical, 33, 813-819. doi:10.1590/S0103-97332003000400035