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Low loss chalcogenide glass and process for making same using arsenic monochalcogenide

Patent image
NRL

This invention pertains to a chalcogenide glass of low optical loss that can be on the order of 30 dB/km or lower, and to a process for preparing the chalcogenide glass. The process includes the steps of optionally preparing arsenic monochalcogenide precursor or the precursor can be provided beforehand; dynamically distilling the precursor in an open system under vacuum from a hot section to a cold section to purify same; homogenizing the precursor in a closed system so that it is of a uniform color; disposing the distilled or purified precursor and at least one chalcogenide element at a hot section of an open distillation system; dynamically distilling under vacuum in an open system so that the precursor and the at least one chalcogenide element are deposited at a cold section of the open system in a more purified state; homogenizing the precursor and the at least chalcogenide element in a closed system while converting the precursor and the at least one chalcogenide element from crystalline phase to glassy phase.

Inventors: 
Nguyen, Vinh Q.; Sanghera, Jasbinder S.; Aggarwal, Ishwar D.
Patent Number: 
Technical domain: 
Materials and Coatings
FIle Date: 
2004-04-15
Grant Date: 
2008-09-02
Grant time: 
1,601 days
Grant time percentile rank: 
29
Claim count percentile rank: 
5
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US NAVY