Intense 2.7 μm Emission, Lifetime and Mechanism of Er³⁺:LaF₃ Nanocrystals Embedded Germanate Oxyfluoride Glass Ceramics

Nonlinear negative transmittance at a CW 980‐nm laser diodes pumping in Yb3+:CaF2 nanocrystals‐embedded glass ceramics

“…To validate whether doping Yb 3+ ions will generate some effect on the diffraction of CaF 2 nanocrystals, we also analyzed the XRD of the GCs doped with Yb 3+ with different concentration. As depicted in Figure S1, we observed that the diffraction peaks shift slightly to lower degrees with increasing Yb 3+ ion concentration, which is similar to the result reported in literatures . What's more, an obvious merit can be found that doping Yb 3+ accelerates the crystallization of CaF 2 nanocrystals.…”

“…As proved by XRD patterns (Figure A), heat treatment at 600°C of the amorphous solid results in the precipitation of CaF 2 nanocrystals, which matches well with the diffraction peaks of CaF 2 (JCPDS [00‐035‐0816]). The mean nanocrystals size can be estimated about 25 nm for the sample heat treated at 600°C through Scherrer's equation . To validate whether doping Yb 3+ ions will generate some effect on the diffraction of CaF 2 nanocrystals, we also analyzed the XRD of the GCs doped with Yb 3+ with different concentration.…”

“…The precursor glasses, with molar composition of 45SiO 2 -25Al 2 O 3 -10Na 2 O-20CaF 2 -xYbF 3 (x=0, 1, 2; in mol%), were fabricated by melt-quenching technique at 1550°C for 1 h according to our previous works. 19 The precursor glasses were then heat treated at 580°C-620°C for 4 h to achieve GCs samples. For further measurements of optical performances, the samples were cut into 10 mm910 mm plates and optically polished with a thickness of 1 mm.…”

Novel Er3+/Ho3+‐codoped glass‐ceramic fibers for broadband tunable mid‐infrared fiber lasers

“…Therefore, it is crucial to rationally design the host materials for realizing efficient MIR emission and laser output. Combining the advantages of the low phonon energy of fluoride nanocrystals and the outstanding chemical durability and thermal stability of the oxide glass matrix, oxyfluoride glass‐ceramics (GCs) have been considered as potential candidates for rare‐earth‐doped fiber lasers . However, regretfully, there is neither report on the fabrication of Er 3+ /Ho 3+ ‐codoped oxyfluoride GC fibers, nor the investigation of broadband tunable MIR spectroscopic properties of these fibers to our best knowledge.…”

Color‐tunable and white emission of Tm3+ doped transparent zinc silicate glass‐ceramics embedding ZnO nanocrystals

“…The intensity of blue emission component increases monotonically with Tm 3+ doing content for 5 minutes heat treatment. No concentration quenching or self‐quenching effect is found as in the literatures, since the concentration of doped Tm 3+ ions is relatively low (≤0.1 mol%) in this work. Luminescence with a wide range of colors, including white, is achieved by combining blue and yellow lights in different intensity ratios through adjusting Tm 3+ content as well as excitation wavelength.…”