Optical spectroscopy of Yb/Er codoped NaY(WO 4 ) 2 crystal

Growth and optical characteristics of Er3+:LiLa(MoO4)2 crystal

“…can be pulled by the Czochralski method, whereas these crystals tend to crack and form color center during the growth process, thus, it is difficulty to obtain large and high-quality single crystals [7][8][9][10][11][12][13]. Bi-based double molybdate and tungstate compounds have lower melting point and no phase transition and can be grown by Czochraski method, whereas they easily erode Pt-crucible during crystal growth [14,15].…”

Polarized spectral analysis of Er3+ ions in Er3+:LiGd(MoO4)2 crystal

“…Er 3+ ion has a favorable energy-level structure with 4 I 15/2 → 4 I 9/2 transition (≈800 nm) and 4 I 15/2 → 4 I 11/2 transition (≈970 nm) in the near-infrared spectral region, which allows the pumping with commercial high power semiconductor lasers. Therefore, the Er 3+ -doped bulk crystals, nano-/micro-materials and glasses have attracted more and more interest [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Investigation on upconversion luminescence in Yb3+/Er3+‐codoped Gd2SiO5 single crystal

“…1 Introduction Yb 3þ /Er 3þ -codoped crystals have attracted great interest due to their efficient 1.55 mm fluorescence and upconversion luminescence in recent years [1][2][3][4][5][6][7][8]. 1.55 mm fluorescence and upconversion laser actions in various materials containing Yb 3þ and Er 3þ ions have been demonstrated [9][10][11][12][13][14][15][16].…”

“…The 99.999% grade raw materials were appropriately predried and weighed according to the formula (Yb 0.05 Er 0.003 Gd 0.947 ) 2 SiO 5 . After the compounds were ground and mixed, they were pressed into pieces, and put into an aluminum crucible.…”

“…So the ET efficiency will play an important role in Yb,Er:GSO crystal. The ET efficiency h can be expressed as [22] [1][2][3] that the green upconversion emission was brighter than the red emission. Figure 3 shows the log-log plot of the upconversion luminescence as a function of pumping power at 940 nm of Yb,Er:GSO crystal.…”