Study of ellipsoidal inclusions in elastically strained optical fiber

2023 Fiscal Year Final Research Report

• Project/Area Number: 18KK0401
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))
• Allocation Type: Multi-year Fund
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: The University of Electro-Communications
• Principal Investigator: Furukawa Rei 電気通信大学, 大学院情報理工学研究科, 准教授 (50589695)
• Project Period (FY): 2019 – 2023
• Keywords: プラスチック光ファイバー / 異方性介在物 / 配向 / マイクロメカニックス / 応力-ひずみ

Outline of Final Research Achievements

Inclusions with strong shape anisotropy were dispersed in a polymer optical fiber with a copolymer core, and the orientation of the inclusions under fiber deformation was investigated. Due to travel restrictions during the period, the destination was changed to Professor Onur Cem Namli's lab at Yeditepe University, Turkiye. At Yeditepe University, the stress distribution of a cylindrical cross section was analyzed. This result suggests that the terpolymers prepared using the interfacial gel polymerization method, which is the method used to construct the core and cladding of fiber preforms, are not ideal random copolymers. Based on this result, a dynamic scattering analysis was conducted in our group in Chofu, which showed that diffusion among the solidified layer and the unreacted monomer contributes to the generation of heterogeneity.

Free Research Field

材料工学

Academic Significance and Societal Importance of the Research Achievements

建物やボンベなどの変形を簡便な方法で随時監視できれば、いろいろな活用法が出てくる。本研究は、そのような構造物の変形検知を、介在物を担持させたプラスチック光ファイバーを使って実現することを目標として実施したものである。プラスチック光ファイバー内の異方性介在物の配向解析において、荷重試験とモデリング双方から実施した。結果、プラスチック担体に１００ nm程度の微視的な異方性があることがわかった。