Optical properties of Er3+-Yb3+ codoped Cd.7Sr.3F2 mixed single crystals

Luminescence properties of CdF2 single crystals co‐doped with Er3+ and Y3+ ions

“…We detailed the J-O formalism protocol in our previous works [6][7][8][9] and, through a least squares fit, we determined Ω t (t = 2, 4, 6) intensity parameters. The fit was done with good residuals (Table 1).…”

“…MF 2 fluorides with a fluorite‐type structure, where M is an alkaline‐earth element (Ba, Ca, Sr), Pb or Cd, doped with RE ions have enabled the development of efficient laser sources for both near‐infrared and ultraviolet regions of the spectrum. BaF 2 , CaF 2 , and SrF 2 have been thoroughly investigated [6–10] in comparison with CdF 2 . This seems to have been very little studied, although it has some advantages: CdF 2 exhibits a wider transparency range and low‐maximum phonon energy (384 cm −1 ) [7], which makes it suitable for applications that require ultraviolet (UV) light transmission, such as UV optics and detectors.…”

Optical properties investigation and multicolor behavior of neodymium (Nd3+)‐doped oxyfluoride silicate glasses SiO2‐PbO‐PbF2

“…As shown in Figure 6, the absorption cross-section spectrum exhibits three high bands corresponding to the transition from the ground state 4 The overlapping absorption bands are taken together, and their matrix element is considered the sum of each squared matrix element.…”

“…Particular attention is also paid to transitions emitting in IR around 2625 and 2350 nm corresponding to 4 τ rad = 0.0621 ms). It is well known that an emission transition having a higher fluorescence branching ratio (β ≥ 50%) and relatively high transition probabilities can emit laser radiation more efficiently [57].…”

“…These elements function as active constituents in materials, finding applications in diverse areas such as phosphors for fluorescent lamps, plasma displays, sensitizers, and lasers. Additionally, rare earth ions play a crucial role in high‐energy radiation detectors, contributing to applications like digital radiography imaging, positron emission tomography (PET), and high‐energy particle physics [1–7].…”