Spectral properties of Er3+-doped gallium lanthanum sulphide glass

Optical properties and infrared-to-visible upconversion in Er3+-doped GeO2–Bi2O3 and GeO2–PbO–Bi2O3 glasses

“…These effective linewidth are in agreement with the ones of the binary system (GeO 2 -PbO) that vary from 52.5 to 58.1 nm as the lead content decrease from 50 to 40 mol%. Table 4 compares GB and GPB glasses with the results of recently published papers [27][28][29][30][31]. The most important characteristic of these glasses is that they present a high index of refraction, of the same order of magnitude of GaLa-S, Ge-Ga-S and GeO 2 -PbO glasses, but they also present large lifetimes for 4 I 13/2 !…”

Optical properties and applications of chalcogenide glasses: a review

“…But if we replace silica with GaLaS as the host, radiative transitions from other upper levels to the next lower level are possible (the energy gap between upper levels is smaller than the energy corresponding to 1.55 lm). Absorption and emission cross sections of Er 3þ -doped GaLaS glasses have been found [56] to be 2.5 times higher than in silica glasses, whereas the multiphonon decay rates can be orders of magnitude lower for levels with small energy gaps, reflecting the high refractive index and the low phonon energy of the glass. Schweizer et al [57] have found that the absorption spectrum of a 9.7 mol% Er 3þ -doped GaLaS glass showed excellent rare-earth solubility and the potential for high doping concentrations and hence short devices; this represents a major advantage of GaLaS glass compared with conventional chalcogenide glasses, which suffer from very low rareearth solubilities.…”

Glass formation, physico-chemical properties, and structure of glasses based on Ga2S3–GeS2–Sb2S3 system

“…Various kinds of chalcogenide systems have been used as host glasses for rare-earth ions, including Ge-S (Se) [12], As-S (Se) [13,14], Ga-Ge-S (Se) [15][16][17][18], Ge-Sb-S [19], Ga-La-S [20][21][22][23][24][25][26][27][28], and Ga-Na-S [29] systems. Among them, the Ga-La-S system is one of the most attractive because of its high solubility of rare-earth ions and its wide transmission wavelength range.…”