Raman spectra and third‐order nonlinear optical Z‐scan properties of MO‐Nb₂O₅‐TeO₂ (M=Zn, Mg, Ca, Sr, Ba) glasses

Abstract

In this paper, the third‐order nonlinear optical susceptibilities, χ(3), of tellurite glasses with MO‐Nb2O5‐TeO2 system (M = Zn, Mg, Ca, Sr, Ba) was investigated by Z‐scan measurement using Ti:Sapphire femtosecond laser pulses. The relationship between the nonlinear optical properties and the glass structures, estimated by Raman spectroscopy, was discussed. The experimental results revealed that when alkaline‐earth ions (M2+) was doped in Nb2O5‐TeO2 binary network system the break in TeIV‐eqOax‐TeIV chain structure necessarily occurred but the terminations of –TeIV‐Oeq‐NbVI‐O‐ + M2+ + ‐Oax‐TeIV‐ or –TeIV‐Oeq‐ + M2+ + ‐O‐NbVI‐Oax‐TeIV‐ were more preferentially induced with an assist of NbO6 polyhedron, which produced TeO3+1 units or stabilized TeIVO4 units (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Optical properties of Nd3+-doped TeO2-TiO2-ZnO glasses with lower hydroxyl content

“…[15,19,20] Thus, a second component of alkali, alkaline-earth and transition metal oxides like WO3, TiO2, Nb2O5, Bi2O3, ZnO etc is intentionally used to obtain stable tellurite-based glasses. [21][22][23][24] To obtain a much higher refractive index, compounds such as BaO, PbO and Bi2O3 are used. [25][26][27] To extend the glassforming ability an intermediate oxide of ZnO can also be used.…”

Glass Structures and Linea/Nonlinear Optical Properties of Ag₂O-Doped TeO₂ Glasses

“…On the contrary, the addition of transition metal oxides with d 0 state (TiO2, Nb2O5, WO3 and MoO3) gave positive effects on the third-order nonlinearities to TeO2-based glasses [2,4]. Our research group recently found that the third-order nonlinear susceptibility χ (3) of xMO-20Nb2O5-(80-x)TeO2 glasses (x < 4) was higher than that of 20Nb2O5-80TeO2 glass [5]. For these backgrounds, we started to estimate optical properties of Nb2O5-TeO2 glasses containing Ag2O which provided higher third-order nonlinear susceptibility χ (3) in binary system (A2O-TeO2; A = Na, K, Cs, Ag) [4] and would rather offer more intriguing effects on linear/nonlinear optical properties.…”

“…TeO2-based glasses have low phonon energy (600~700 cm -1 ), large third-order nonlinear susceptibility χ (3) , low melting temperature, low glass transition temperature (Tg), good chemical resistance, good optical transmission for infrared light with a wide range of wavelength and high refractive indices [1][2][3][4][5][6]. For these reasons, the glasses have been studied for many years and have received considerable attentions in view of their potentials for use as nonlinear optical devices, such as optical wavelength converters, optical switching, Raman amplifications and so on [3].…”