Nonlinearity of refractive index in glasses based on heavy metal oxides with different lead and tellurium contents
We have studied the nonlinearity of the refractive index at a wavelength of 1.08 µm for optical lead silicate and lead phosphate tellurite glasses of different compositions. We have shown that the nonlinear refractive index n2 increases as the lead content increases in lead silicate glasses and as the tellurium content increases in lead phosphate tellurite glasses, where the latter are typically have higher values of n2, as high as 24·10−13 cgs units (47·10−16 cm2/W), and lower Rayleigh losses. We have established a correlation between the nonlinear refractive index and the microstructure of the studied glasses. The highly nonlinear glasses are distinguished by extensive fluctuations in the heavy metal oxide concentration which are “frozen” during cooling of the glass melt.
Key wordsnonlinear refractive index lead silicate glass lead phosphate tellurite glasses Rayleigh scattering “frozen” density fluctuations Landau-Placzek ratio
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- 1.H. Tichá and L. Tichý, J. Optoelectron. and Adv. Mater., 4, 381–386 (2002).Google Scholar
- 4.W. L. Smith, Handbook of Laser Science and Technology, Chemical Rubber Co., Boca Raton (1986), Vol. 3, Pt. 1.Google Scholar
- 7.H. Rawson, Inorganic Glass Forming Systems, Academic Press, London/New York (1967).Google Scholar
- 10.I. L. Fabelinskii, Molecular Light Scattering [in Russian], Nauka, Moscow (1965).Google Scholar
- 11.G. O. Karapetyan and L. V. Maksimov, Kvant. Elektron., 11, 1840–1842 (1984).Google Scholar
- 13.J. Schroeder, Treatise on Materials Science and Technology, 12, Glass 1, Academic Press, New York (1975).Google Scholar
- 15.M. F. Vuks, Light Scattering in Gases, Liquids, and Solutions [in Russian], Izdat. Leningr. Univ., Leningrad (1977).Google Scholar