Tellurite glasses with peak absolute Raman gain coefficients up to 30 times that of fused silica

Abstract

An experimental system has been assembled to measure the absolute values of the Raman gain spectrum for millimeter-thick glass samples. Results are reported for two new oxide glasses with Raman gain coefficients as much as 30 times larger than that of fused silica and more than twice its spectral coverage.

Tellurite Glass Fibers for Mid-infrared Nonlinear Applications

“…The damage intensity is estimated to be 18.7 GW/cm 2 . This is consistent with the reported surface damage threshold of tellurite bulk glasses, 15-20 GW/cm 2 using a Nd:YAG laser at 1.064 µm with a similar pulse duration of 25 ps [59]. As a comparison, under similar conditions the surface damage threshold of bulk silica glass is above 300 GW/cm 2 [60].…”

NIR luminescence from Er–Yb, Bi–Yb and Bi–Nd codoped germanate glasses for optical amplification

“…In order to develop the broadband fiber amplifiers and the broadly tunable laser sources for an efficient wavelength division multiplexing system, it is important to explore the new luminescent materials with larger full width at half maximum in the telecommunication wavelength region, especially at 1300 nm and 1550 nm [1][2][3][4][5]. The 1.5 m emission band of Er 3+ dopant corresponding to 4 I 13/2 → 4 I 15/2 transition is a key element of the Er 3+ -doped optical amplifier and other waveguide and bulk optically integrated devices, which operate at 1.5 m wavelength of the telecommunications window, while the large spectral width and flatness of this band are of primary importance.…”

Efficient near-infrared supercontinuum generation in tellurite holey fiber pumped 320nm within the normal dispersion regime

“…Specifically, the first-order Stokes component with two peaks was clearly observed when the launched average pump power was fairly low at just 16.5mW. These two Raman bands at 1.11µm and 1.15µm arise from the Te-O-Te chain unit's symmetric stretching mode with a Raman shift of 440cm -1 and a TeO 4 bipyramidal unit with a Raman shift of 740cm -1 , respectively [5]. When the launched average pump power was increased to 35.6mW, the second-order Stokes component peaking at 1.25µm began to appear.…”