Mechanical and ∼2μm emission properties of Tm3+-doped GeO2–TeO2 (or SiO2)–PbO–CaO glasses

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr3+ and Tm3+ ions

“…Previously published studies for glass systems containing Tm 3+ ions compared with presented data for titanate‐germanate glasses give interesting results. It can be stated that the stimulated emission cross‐section and the gain bandwidth for 3 F 4 → 3 H 6 transition of Tm 3+ ions in the studied system (GeO 2 :TiO 2 = 1:2) are similar to values reported by Gao et al 56 . for glass based on GeO 2 –TeO 2 –PbO–CaO.…”

“…Previously published studies for glass systems containing Tm 3+ ions compared with presented data for titanate-germanate glasses give interesting results. It can be stated that the stimulated emission cross-section and the gain bandwidth for 3 F 4 → 3 H 6 transition of Tm 3+ ions in the studied system (GeO 2 :TiO 2 = 1:2) are similar to values reported by Gao et al 56 for glass based on GeO 2 -TeO 2 -PbO-CaO. On the other hand, the values of laser parameters are large compared with borate 60 and phosphate glasses 61 but are less than those calculated for another germanate 55 and tellurite glass systems.…”

“…Finally, Tables 14 and 15 present a comparison of spectroscopic parameters in various inorganic systems doped with praseodymium [51][52][53][54] and thulium. [55][56][57][58][59][60][61] It was found that the stimulated emission cross-section, gain bandwidth, and FOM for the 1 D 2 → 1 G 4 transition of Pr 3+ ions are comparable to those of other germanate glasses. 51 Additionally, values of σ em × FWHM (233 × 10 −27 cm 3 ) and FOM σ em × τ m (102 × 10 −26 cm 2 s) are greater than those obtained for tellurite 46 and borate 54 systems.…”

Luminescence investigations of rare earth doped lead-free borate glasses modified by MO (M = Ca, Sr, Ba)

“…Similar to GeO 2 -TeO 2 (or SiO 2 )-PbO-CaO glasses [37], the absence of crystallization temperatures (T x and T p ) in DSC curves of the glass samples suggests that thermal stability parameters DT defined as difference between the crystallization onset and the glass transition temperature (DT ¼ T x À T g ) are relatively large. From literature data it is generally known that the thermal stability DT of the glass sample should be higher than 100 C to obtain a wide operating temperature range and to avoid crystallization during fiber drawing [37]. From DSC curves glass transition temperatures T g were evaluated for glass samples containing different modifiers MO (M ¼ Ca, Sr or Ba).…”

Optical characterization of Tm3+ doped Bi2O3-GeO2-Ga2O3 glasses in absence and presence of BaF2

“…However, it is still higher than of fluoride28, tellurite29 glasses, this results show that the glasses have good thermal shock resistance performance under the condition of high power pump. Generally, the ΔT of the glass sample should be higher than 100 °C to obtain a better thermal stability and to avoid crystallization during the optical fiber drawing process3031. After the addition of BaF 2 , the thermal stability ( ΔT ) of Bi 2 O 3 -GeO 2 -Ga 2 O 3 glass is increased quite significantly.…”