Preparation of high purity glasses in the Ga–Ge–As–Se system

Abstract Small additions of Ga to Ge–As–Se glasses are known to enhance rare earth ion solubility in Ge–As–Se chalcogenide glasses designed for active optical applications. The effect of variants and conditions for producing samples of an exemplar Ge 16 As 17 Se 64 Ga 3 (atomic%) glass on optical transmission, and the content of limiting impurities, is investigated. To prepare the high-purity glass samples, chemical distillation for purification of the Ge–As–Se base-glass is used. Next, a new vapor phase transport approach of metallic Ga transfer in a GaI 3 flow is developed to purify and add the batch of metallic gallium into the silica-glass reactor for the Ge–As–Se–Ga glass synthesis. A thermodynamic equilibrium based vapor phase transport model is discussed. In the best examples of these glasses, the content of residual impurities is: hydrogen – 0.15 ppm, oxygen –

[1]  E. M. Dianov,et al.  Recent advances in preparation of high-purity glasses based on arsenic chalcogenides for fiber optics , 2011 .

[2]  Jean-Luc Adam,et al.  GeSe4 glass fibres with low optical losses in the mid-IR , 2009 .

[3]  Valentina F. Kokorina,et al.  Glasses for Infrared Optics , 1996 .

[4]  E. M. Dianov,et al.  High-purity chalcogenide glasses for fiber optics , 2009 .

[5]  B. Park,et al.  1.6 μm emission from Pr3+: (3F3,3F4)→3H4 transition in Pr3+- and Pr3+/Er3+-doped selenide glasses , 2001 .

[6]  Victor G. Plotnichenko,et al.  Chalcogenide glasses doped with Tb, Dy and Pr ions , 2003 .

[7]  M. Horiguchi,et al.  Preparation of Ge-S Glass Fibers with Reduced OH, SH Content , 1981 .

[8]  Takashi Yamagishi,et al.  Optical and thermal properties of chalcogenide Ge-As-Se-Te glasses for IR fibers , 1987 .

[9]  Jean-Luc Adam,et al.  Infrared fibers based on Te–As–Se glass system with low optical losses , 2004 .

[10]  Leslie Brandon Shaw,et al.  Rare-earth doped selenide glasses and fibers for active applications in the near and mid-IR , 1999 .

[11]  S. Sakka,et al.  Relation between apparent glass transition temperature and liquids temperature for inorganic glasses , 1971 .

[12]  Jean-Luc Adam,et al.  Recent progress in preparation of chalcogenide As-Se-Te glasses with low impurity content , 2005 .

[13]  Ishwar D. Aggarwal,et al.  Fabrication of Arsenic Sulfide Optical Fiber with Low Hydrogen Impurities , 2002 .

[14]  Slawomir Sujecki,et al.  Progress in rare-earth-doped mid-infrared fiber lasers. , 2010, Optics express.

[15]  P. Němec,et al.  Synthesis and properties of Pr3+-doped Ge–Ga–Se glasses , 2002 .