Spectroscopic studies of radiative transitions and upconversion characteristics of Er^3+ ions in simple pseudoternary fluoride glasses MF_n–BaF_2–YF_3 (M: Zr, Hf, Al, Sc, Ga, In, or Zn)

Spectroscopic properties and energy transfer process in Er3+ doped ZrF4-based fluoride glass for 2.7μm laser materials

“…Therefore, the excellent infrared transmission property provides potential application for mid-infrared laser material. Important spectroscopic and laser parameters of rare earth doped glasses have been commonly analyzed using the Judd-Ofelt theory by many researchers [30][31][32]. Details of the theory and method have been well described earlier [33][34][35], hence only results will be presented here.…”

“…Tanabe et al showed that, for fluoride glasses, X 6 increases due to decreasing local basicity of the ligands [32]. Therefore, X 6 has various values in some kinds of fluoride glasses due to different local basicities of ligands corresponding to the glass compositions.…”

Optical properties and local structure of rare-earth-doped amplifier for broadband telecommunication

“…The important factor dominating the cross-section and its bandwidth is the Judd-Ofelt Ω 6 parameter of Er 3+ ions [7] as well as the refractive index. We also reported a strong correlation between the Ω 6 and the ionicity of Er-ligand bond in various glasses and its origin [8,9]. Therefore, it is interesting to investigate glass systems giving ionic ligand fields, which would attain a large Ω 6 .…”

Optical Properties of Nd3+ Doped Phosphate Glasses at 4F3/2 -> 4I11/2 Hypersensitive Transitions

“…The larger value of  2 for both types reflects on the higher sensitivity of each glass. In addition, the  6 parameter is found higher in [1,10,9,21] glasses than that phosphate glasses indicating a higher of the rigidities of the host matrix due to distance between Nd 3+ ions and the ligands increase [9,25]. The spectroscopic quality factor has been determined by using equation  =  4 / 6 to predict the branching ratios,  R at lasing transitions.…”