Optical properties of Er3+-Yb3+ codoped CdF2 single crystals

Determination of charge-compensated C 3υ (II) centers for Er3+ ions in CdF2 and CaF2 crystals*

“…g ⊥ = −15.42∆Z 3 + 5.40∆Z 2 − 0.1108∆Z + 8.557, (15) g av = 4.166∆Z 3 + 0.141∆Z 2 − 0.3796∆Z + 6.448, (16) where the maximal root-mean-squqre (RMS) deviation from the calculated values is less than 0.01. Up to now, the reason appears to be clear.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Weakly interacting dopants with rare-earth ions are favourable for the possibility of production of the compact laser. [10][11][12][13] In particular, the case of Er 3+ is of considerable interest, [14][15][16][17][18][19][20][21] since it has been found that the visible and infrared photoluminescence spectra of Er 3+ ions with low concentration in MF 2 -type fluorides are closely related to the different charge compensation centers, mainly resulting from the modification of local site symmetry and local lattice distortion.…”