Raman gain measurements of thallium-tellurium oxide glasses

Abstract

Several different compositions of tellurium-thallium oxide glasses were fabricated and tested for their Raman gain performance. The addition of PbO to the glass matrix increased the surface optical damage threshold by 60-230%. The maximum material Raman gain coefficient experimentally obtained was (58 +/- 3) times higher than the peak Raman gain of a 3.18 mm thick Corning 7980-2F fused silica sample (Deltanu = 13.2 THz). The highest peak in the Raman gain spectrum of the tellurium-thallium glass is attributed to the presence of TeO3 and TeO3+1 structural units with thallium ions in the vicinity at a frequency shift near 21.3 THz.

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

“…The third-order nonlinear susceptibility χ (3) was investigated by femto-second Z-scan technique. In the present condition, two photon absorption due to an imaginary part of χ (3) was negligible and so here only a real part of χ (3) is discussed. Figure 3 shows the compositional dependency of Reχ (3) on the content of MO doped.…”

“…In the present condition, two photon absorption due to an imaginary part of χ (3) was negligible and so here only a real part of χ (3) is discussed. Figure 3 shows the compositional dependency of Reχ (3) on the content of MO doped. It is found that the introduction of MO into Nb 2 O 5 -TeO 2 glass generally improved the nonlinearity.…”

“…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 (M 1 Introduction Due to high refractive index and high nonlinear optical properties of tellurite (TeO 2 ) materials [1][2][3], there are a large number of researches on TeO 2 -based glasses carried out to construct very reliable and rapid alloptical networks (AONs). It is reported that third-order nonlinear susceptibilities of the glasses were by several orders of magnitude larger than those of conventional silicate and borate glasses [4,5], and thus several applications to nonlinear optical devices are expected, such as optical frequency converters, optical switching, Raman amplifications and so on.…”

“…Several systems based on a In this study, the third-order nonlinear optical susceptibilities χ (3) of tellurite glass with MO-Nb 2 O 5 -TeO 2 system (M = Zn, Mg, Ca, Sr and Ba) was investigated by Z-scan measurement using Ti:Sapphire femto-second laser. The relationship between the nonlinear optical properties and the glass structure estimated by Raman spectroscopy will be discussed.…”

Raman scattering enhancement characteristic of NbCl5- and Nb2O5-doped silica fibers

“…Thus, silicon dioxide-based glasses, due to their compatibility with existing optical fiber technology and the low loss, are more attractive than tellurite-like materials. In these works, Nb 2 O 5 can be found doped in tellurite classes and silicon dioxide-based glasses, and it can enhance the Raman gain characteristic of the glasses [11,12] . In this Letter, novel specialty fiber, Nb-doped silica fibers were fabricated with the modified chemical vapor deposition method.…”