Crystallisation effects on rare earth dopants in oxyfluoride glass ceramics

Transparent oxyfluoride glass-ceramic materials are of significant interest for the production of new optoelectronic devices. In this paper we report measurements of the detailed spectroscopy of rare earth dopants in both an oxyfluoride transparent glass ceramic and its glass precursor. We show that several spectroscopically different sites exist for the rare earth even in the glass precursor material, where a significant amount of the rare earth is already coordinated with fluorine. In the glass-ceramic material, these glassy fluorine-coordinated sites are replaced with crystalline sites, but a significant fraction of the rare earth ions are still within the glass phase. The fraction of rare earth ion that is incorporated into the crystalline phase is estimated from the rare earth spectroscopy, and the role of the rare earth coordination in the precursor glass is discussed.

[1]  David N. Payne,et al.  New class of fibre laser based on lead-germanate glass , 1992 .

[2]  Anne C. Tropper,et al.  Thulium-doped fluorozirconate fibre lasers , 1992 .

[3]  W. H. Lowdermilk,et al.  Multiphonon relaxation of rare-earth ions in oxide glasses , 1977 .

[4]  M. J. Weber,et al.  Probabilities for Radiative and Nonradiative Decay of Er 3 + in La F 3 , 1967 .

[5]  Nicholas F. Borrelli,et al.  Transparent glass ceramics for 1300 nm amplifier applications , 1995 .

[6]  G. Baxter,et al.  Thermalization effects between upper levels of green fluorescence in Er-doped silica fibers. , 1994, Optics letters.

[7]  Junichi Ohwaki,et al.  New transparent vitroceramics codoped with Er3+ and Yb3+ for efficient frequency upconversion , 1993 .

[8]  A. Kaminskiĭ,et al.  Laser Crystals: Their Physics and Properties , 1990 .

[9]  B. Judd,et al.  Optical Spectra of Transparent Rare Earth Compounds , 1978 .

[10]  B. Warren,et al.  X-Ray Diffraction , 2014 .

[11]  P. A. Tick,et al.  Efficient neodymium-doped glass-ceramic fiber laser and amplifier. , 2001, Optics letters.

[12]  Yoji Kawamoto,et al.  Upconversion luminescence of Er3+ in transparent SiO2—PbF2—ErF3 glass ceramics , 1998 .

[13]  W. Krupke.  OPTICAL ABSORPTION AND FLUORESCENCE INTENSITIES IN SEVERAL RARE-EARTH-DOPED Y$sub 2$O$sub 3$ AND LaF$sub 3$ SINGLE CRYSTALS , 1966 .

[14]  W. Brocklesby,et al.  Spectroscopic evaluation of the vibrational coupling of Er3+ ions in phospho-aluminosilicate fibres and an explanation of compositional variations in Er-Yb 1.5 μm amplifier performance , 1994 .

[15]  R M Macfarlane,et al.  Spectral hole burning in thulium-doped glass ceramics. , 2001, Optics letters.

[16]  Ian M. Reaney,et al.  The relationship between structure and transparency in glass-ceramic materials , 2000 .

[17]  Anne C. Tropper,et al.  Time resolved and site selective spectroscopy of thulium doped into germano- and alumino-silicate optical fibres and preforms , 1991 .

[18]  R. Kanno,et al.  Up-conversion characteristics of Er3+ in transparent oxyfluoride glass–ceramics , 1998 .

[19]  Zdeněk Strnad,et al.  Glass ceramic materials , 1965 .

[20]  Richard S. Quimby,et al.  Quantum efficiency of Pr3+ doped transparent glass ceramics , 1998 .