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Islam, M. & Saleem, M. R. (2012) Composition-Property Correlation in B2O3-SiO2 Preform Rods Produced Using Modified Chemical Vapor Deposition Technique. J. Mater. Eng. Perform. 21 202–207. 
Added by: Laurent Cournède (2016-03-10 21:28:40)
Type de référence: Article
DOI: 10.1007/s11665-011-9902-7
Numéro d'identification (ISBN etc.): 1059-9495
Clé BibTeX: Islam2012
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Catégories: PCM
Mots-clés: advanced characterization, behavior, dip, Electron microscopy, electronic materials, fiber, films, polarization, silica
Créateurs: Islam, Saleem
Collection: J. Mater. Eng. Perform.
Consultations : 16/458
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
Due to unique optical properties of high birefringent (Hi-Bi) fibers for sensing and coherent optical communications, there is a strong interest in process optimization at preform fabrication and fiber drawing stages. Boron-doped silica cladding acts as stress-applying part resulting in polarization properties of Hi-Bi fibers that are strongly dependent on chemical composition. Using modified chemical vapor deposition (MCVD) technique, B2O3-doped silica preform rods were synthesized under different precursor gas flow conditions. Qualitative information about B2O3-SiO2 system composition was derived from etching behavior in nonbuffered HF solution and subsequent microstructural examination using scanning electron microscope. Significant degree of B2O3 incorporation was seen in case of high BCl3:SiCl4 ratio and mild oxygen-deficient processing conditions. Increasing the B2O3 content to similar to 26 mol\% led to a corresponding increase in coefficient of thermal expansion (CTE) to a maximum value of 2.35 ppm/K. The value of refractive index (RI), on the other hand, was found to decrease with increased B2O3 incorporation. A qualitative correlation between B2O3 and SiO2 system composition and physical properties such as CTE and RI was established.
Added by: Laurent Cournède  
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