Table of Contents
Journal of Photonics
Volume 2016 (2016), Article ID 2781392, 11 pages
Research Article

End Face Damage and Fiber Fuse Phenomena in Single-Mode Fiber-Optic Connectors

Ofra Project, Iruma 358-0023, Japan

Received 17 January 2016; Revised 22 May 2016; Accepted 30 May 2016

Academic Editor: Roberto Proietti

Copyright © 2016 Yoshito Shuto. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The evolution of both the core melting and fiber fuse phenomena in a single-mode fiber-optic connector was studied theoretically. Carbon black was chosen as a light-absorbent material. A thin absorbent layer with a thickness of 1 μm order was assumed to be formed between the fiber end faces in the connector. When a high-power laser operating at 1.48 or 1.55 μm was input into the connector, the temperature on the fiber core surface increased owing to heat conduction from the light-absorbent material. The heat flow process of the core, which caused the core to melt or the fiber fuse phenomenon, was theoretically calculated with the explicit finite-difference method. The results indicated that initial attenuation of less than 0.5 dB was desirable to prevent core fusion in the connectors when the input 1.48 μm laser power was 1 W. It was found that a core temperature of more than 4000 K was necessary to generate and maintain a fiber fuse.