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Thermally stable IR-transmitting chalcogenide glass

Patent image
NRL

A thermally stable chalcogenide glass, a process for making the same, and an optical fiber drawn therefrom are provided. A chalcogenide glass having the composition Ge(5−y)As(32−x)Se(59+x)Te(4+y) (0≦y≦1 and 0≦x≦2) is substantially free from crystallization when it is heated past the glass transition temperature Tg or drawn into optical fibers. A process for making the thermally stable chalcogenide glass includes purifying the components to remove oxides and scattering centers, batching the components in a preprocessed distillation ampoule, gettering oxygen impurities from the mixture, and heating the components to form a glass melt. An optical fiber formed from the chalcogenide glass is substantially free from crystallization and exhibits low signal loss in the near-infrared region, particularly at wavelengths of about 1.55 μm.

Inventors: 
Nguyen, Vinh Q.; Sanghera, Jasbinder S.; Aggarwal, Ishwar D.
Patent Number: 
Technical domain: 
Machines and Processing
FIle Date: 
2010-06-18
Grant Date: 
2011-02-22
Grant time: 
249 days
Grant time percentile rank: 
4
Claim count percentile rank: 
3
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY