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A platform for research: civil engineering, architecture and urbanism
Monolithic Silica Glass Cylinders for Optical Fiber
Abstract The emergence of optical communication in the 1970’s led to a search for a means to produce “waveguide quality silica”. Such silica is characterized by having extremely low loss resulting from the lack of a combination of optical absorption (Fe, Co, Ni, Cr, OH- contamination) and scattering (striations, bubbles, etc) as well as freedom from insoluble refractory oxide particles which induce low stress mechanical breaks in fiber. Vapor deposition techniques (OVD [1], MCVD [2], VAD [3]) were the early winners but the glass produced was expensive. So there ensued a search for other processing means. These included “double crucible” melts [4], microporous cylinders made by leaching of phase separated cast glass bodies [5], mechanical compaction [6], centrifugation [7] and sol-gel [8, 9]. Of these, only colloidal-gel bodies reached the stage of commercialization [10] and that after some time. However, there exists the belief that the processes initially developed for the most demanding application will find wider use in the future.
Monolithic Silica Glass Cylinders for Optical Fiber
Abstract The emergence of optical communication in the 1970’s led to a search for a means to produce “waveguide quality silica”. Such silica is characterized by having extremely low loss resulting from the lack of a combination of optical absorption (Fe, Co, Ni, Cr, OH- contamination) and scattering (striations, bubbles, etc) as well as freedom from insoluble refractory oxide particles which induce low stress mechanical breaks in fiber. Vapor deposition techniques (OVD [1], MCVD [2], VAD [3]) were the early winners but the glass produced was expensive. So there ensued a search for other processing means. These included “double crucible” melts [4], microporous cylinders made by leaching of phase separated cast glass bodies [5], mechanical compaction [6], centrifugation [7] and sol-gel [8, 9]. Of these, only colloidal-gel bodies reached the stage of commercialization [10] and that after some time. However, there exists the belief that the processes initially developed for the most demanding application will find wider use in the future.
Monolithic Silica Glass Cylinders for Optical Fiber
MacChesney, J. B. (author) / Johnson, D. W. Jr. (author)
2004-01-01
6 pages
Article/Chapter (Book)
Electronic Resource
English
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