Patent ID: 8995802
Filing Date: 2015-03-31
Classification: C03C,G02F,H01S,Y10T

Abstract:
1. An oxide glass composition for transmission of light over an IR spectral band having an upper edge of at least 3.5 microns, comprising: a network former of 45 to 90 mole percent of an oxide formed from Tellurium (Te), Lead (Pb), Tantalum (Ta), Bismuth (Bi), Gallium (Ga), Antimony (Sb), Arsenic (As), or combinations thereof, a glass intermediate or modifier of 0.2 to 45 mole percent of an oxide formed from Lanthanum (La), Thallium (Tl), Yttrium (Y), Tantalum (Ta), Bismuth (Bi), Gallium (Ga), Antimony (Sb), Arsenic (As), Titanium (Ti), Zirconium (Zr), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), Zinc (Zn), Lead (Pb) or Cadmium (Cd) or combinations thereof, and a non-zero amount of halide less than 0.5 mole percent, wherein said network former, intermediate or modifier, and any said halide or any other passive glass constituent of at least 0.2 mole percent each have an absorption wavelength corresponding to an energy of the third phonon peak that is approximately at or longer than the upper edge of the IR spectral band, wherein said heavy metal oxide glass is substantially free comprising less than 0.1 mole percent of Hydroxide (OH—), said glass exhibiting an optical loss of less than 2 dB/m from 0.6 microns to 4.5 microns.