Abstract
We have investigated a fabricating method for a graded index polymer optical fiber preform using a centrifugal force. When two monomers with different densities and refractive indices are polymerized under a centrifugal force, a concentration gradient is generated due to their density difference. Therefore, a graded refractive index can be obtained according to the concentration gradient. When a monomer is polymerized under a centrifugal force, a preform with a hollow is obtained because of volume shrinkage. To compensate for this practically, additional monomer should be filled into the hollow. Monomer should be fed to obtain a continuous gradient of refractive index at the interface before the first polymerized product is perfectly glassified. Two different types of feeding additional monomer were experimented with: monomer-monomer pair (case I) and monomer-polymer pair (case II). The graded index profile with a proper δn (about 0.01) was successfully obtained in either case.
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Im, S.H., Sun, D.J., Park, O.O. et al. Fabrication of a graded-index polymer optical fiber preform by using a centrifugal force. Korean J. Chem. Eng. 19, 505–509 (2002). https://doi.org/10.1007/BF02697164
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DOI: https://doi.org/10.1007/BF02697164