A Chalcogenide glass is a glass containing a chalcogenideelement (sulphur, selenium or tellurium) as a substantial constituent. The materials definition of a glass is a uniform amorphous solid material, usually produced when a suitably viscous molten material cools very rapidly, thereby not giving enough time for a regular crystal lattice to form. ... The chalcogens are the name for the periodic table group 16 (old-style: VIB or VIA) in the periodic table. ... Generally, an element is a basic part that is the foundation of something. ... For the chemical element see: sulfur. ... General Name, Symbol, Number selenium, Se, 34 Series nonmetals Group, Period, Block 16 (VIA), 4, p Density, Hardness 4790 kg/m3(300K), 2 Appearance grey, metallic lustre Atomic properties Atomic weight 78. ... General Name, Symbol, Number tellurium, Te, 52 Series metalloids Group, Period, Block 16 (VIA), 5, p Density, Hardness 6240 kg/m3, 2. ...
Chalcogenideglasses are glasses containing as a main component(s) sulfur (S), selenium (Se) and/or tellurium (Te), and their IR radiation transmitting range is shifted to the longer wavelength side by increasing the concentration of Be which has the largest atomic weight.
The cylindrical chalcogenideglass fiber preform which is vertically placed in the cylindrical crucible is heated at the vicinity of the nozzle such that the viscosity of the glass at the vicinity of the nozzle is within the range of 10.sup.3 to 10.sup.7.5 poises and preferably from 10.sup.5.5 to 10.sup.6.8.
An additional disadvantage is that the components of the chalcogenideglass may evaporate during the heating operation to cause potential fluctuations in the composition of the chalcogenideglass.
A glass composition consisting essentially of silver, thallium, and sulfur in a ratio of x moles of silver, y moles of thallium, and z moles of sulfur, where x +y +z is about 4 and z=about 2x and about 2y.
The present invention provides a chalcogenideglass composition of silver, thallium and sulfur in a glass formable ratio of x moles of silver, y moles of thallium and z moles of sulfur, where x +y +z is about 4 and z=about 2x and about 2y.
Glass prepared according to this invention can be used in a variety of optical, acoustic, and acousto-optical devices including optical spectrometers, nonlinear optical devices and the infrared, such as laser frequency converters, optical parametric oscillators, mixers and harmonic generators.
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