Raman spectroscopy and the origin of electrooptical Kerr phenomenon in niobium alkali-silicate glasses

Abstract It is shown that magnitudes of the Kerr coefficient and permittivity of 19Na 2 O–11K 2 O–2B 2 O 3 –2CdO–(66− x )SiO 2 – x Nb 2 O 5 glasses, where 0 x 2 O·Nb 2 O 5 groupings, with that content being estimated by Raman scattering data. This allows assigning to these groupings, or to other structural entities containing such groupings (for example, crystal motifs), the responsibility for high-polarizability and Kerr sensitivity of the glasses.