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Insights and Aspects to the Modeling of the Molten Core Method for Optical Fiber Fabrication
- Source :
- Materials, Volume 12, Issue 18, Materials, Vol 12, Iss 18, p 2898 (2019)
- Publication Year :
- 2019
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2019.
-
Abstract
- The molten core method (MCM) is a versatile technique to fabricate a wide variety of optical fiber core compositions ranging from novel glasses to crystalline semiconductors. One common feature of the MCM is an interaction between the molten core and softened glass cladding during the draw process, which often leads to compositional modification between the original preform and the drawn fiber. This causes the final fiber core diameter, core composition, and associated refractive index profile to vary over time and longitudinally along the fiber. Though not always detrimental to performance, these variations must, nonetheless, be anticipated and controlled as they directly impact fiber properties (e.g., numerical aperture, effective area). As an exemplar to better understand the underlying mechanisms, a silica-cladding, YAG-derived yttrium aluminosilicate glass optical fiber was fabricated and its properties (core diameter, silica concentration profile) were monitored as a function of draw time/length. It was found that diffusion-controlled dissolution of silica into the molten core agreed well with the observations. Following this, a set of first order kinetics equations and diffusion equation using Fick&rsquo<br />s second law was employed as an initial effort to model the evolution of fiber core diameter and compositional profile with time. From these trends, further insights into other compositional systems and control schemes are provided.
- Subjects :
- optical fiber
Materials science
Optical fiber
Diffusion equation
dissolution
02 engineering and technology
Refractive index profile
lcsh:Technology
01 natural sciences
Article
law.invention
010309 optics
law
0103 physical sciences
General Materials Science
Composite material
lcsh:Microscopy
Dissolution
lcsh:QC120-168.85
lcsh:QH201-278.5
molten core method
lcsh:T
business.industry
diffusion
Rate equation
021001 nanoscience & nanotechnology
Cladding (fiber optics)
Numerical aperture
Semiconductor
lcsh:TA1-2040
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
lcsh:Engineering (General). Civil engineering (General)
0210 nano-technology
business
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.doi.dedup.....e1d6a0d4f35fac79efdbe9838f9e68ec
- Full Text :
- https://doi.org/10.3390/ma12182898