Accession Number N20120016709
Title Eliminating Crystals in Non-Oxide Optical Fiber Preforms and Optical Fibers.
Publication Date 2012
Media Count 24p
Personal Author D. S. Tucker M. R. LaPointe
Abstract Non-oxide fiber optics such as heavy metal fluoride and chalcogenide glasses are extensively used in infrared transmitting applications such as communication systems, chemical sensors, and laser fiber guides for cutting, welding and medical surgery. The addition of rare earths such as erbium, enable these materials to be used as fiber laser and amplifiers. Some of these glasses however are very susceptible to crystallization. Even small crystals can lead to light scatter and a high attenuation coefficient, limiting their usefulness. Previously two research teams found that microgravity suppressed crystallization in heavy metal fluoride glasses. Looking for a less expensive method to suppress crystallization, ground based research was performed utilizing an axial magnetic field. The experiments revealed identical results to those obtained via microgravity processing. This research then led to a patented process for eliminating crystals in optical fiber preforms and the resulting optical fibers. In this paper, the microgravity results will be reviewed as well as patents and papers relating to the use of magnetic fields in various material and glass processing applications. Finally our patent to eliminate crystals in non-oxide glasses utilizing a magnetic field will be detailed.
Keywords Chalcogenides
Configurations
Crystallization
Fiber lasers
Fiber optics
Glass
Heavy metals
Light amplifiers
Magnetic fields
Metal fluorides
Microgravity
Optical fibers
Space processing
Telecommunication


 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 71F - Composite Materials
84 - Space Technology
Corporate Author National Aeronautics and Space Administration, Huntsville, AL. George C. Marshall Space Flight Center.
Document Type Journal article
Title Note N/A
NTIS Issue Number 1316
Contract Number N/A

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