Spectroscopic properties of Er3+–Yb3+ co-doped glass ceramics containing BaF2 nanocrystals

Nano-crystals precipitation and upconversion luminescence properties in Er3+/Yb3+ co-doped fluoride phosphate glass-ceramics

“…Subsequently, the Er 3+ could easily absorb energy from another adjacent Yb 3+ , then transit to excited state 4 F 7/2 [15,16]. A fast non-radiative relaxation from 4 F 7/2 to 2 H 11/2 and 4 S 3/2 occurs, then Er 3+ relaxes to the ground state and emits the green luminescence [17,18].…”

Optical applications of glass-ceramics

“…Various types of materials doped with Er 3+ ions are intensively studied as possible media for lasers emitting at eye-safe wavelength around 1.5 μm, among them glass-ceramics with Er-doped nanocrystals [17,19,25,121,122]. Rare-earth titanates with pyrochlore structure attract attention as materials with unusual properties, their optical properties were studied elsewhere [123].…”

“…There are transparent low thermal expansion glass-ceramics based on the LAS system for large type telescope mirror blanks, for ring laser gyroscopes and optical parts [5][6][7]. Transparent glass-ceramics based on fluoride [8][9][10][11][12], oxyfluoride [13][14][15][16][17][18][19][20][21][22][23][24][25][26], chalcogenide [27,28] glasses, and doped by rare-earth ions are successfully used for wavelength up-conversion devices, for erbium doped waveguide amplifiers [29]. Transparent mullite [30][31][32][33], spinel [33][34][35][36][37][38], gahnite [3,33,35,39], willemite [39,40], forsterite [41] and gehlenite [42] based glass-ceramics doped with transition metal ions were developed for use in broadband optical amplification, tunable and infrared lasers and in solar collectors [43][44][4...…”

The thermal study of oxyfluoride glass with strontium fluoride

“…Trivalent lanthanide ions could be substituted for the divalent alkaline-earth cations, what gave probabilities of preparing lanthanide doped glass ceramics containing alkaline-earth fluoride nanocrystals e.g. SrF 2 [20][21][22][23][24][25][26][27]. In the present work the compositional dependence of thermal stability and some optical properties on SrF 2 content in oxyfluoride glasses was studied.…”