Thermal Characteristics of Access Cables Composed of Newly Designed Coated Fibers


IEICE TRANSACTIONS on Communications   Vol.E89-B   No.3   pp.709-714
Publication Date: 2006/03/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.3.709
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Optical Fiber for Communications
FTTH,  optical fiber cable,  fiber strain,  temperature dependence,  photon counting OTDR,  

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The changes in fiber strain and fiber loss with temperature are quantitatively evaluated for 0.5 mm UV-coated fiber and three kind of fiber-optic access cables, for dropping and indoor wiring, employing 0.5 mm UV-coated fiber. Measurements of the fiber strain and loss increase are conducted using a quasi-heterodyne interferometer method and a photon-counting optical-time-domain-reflectmeter, respectively, at 1.3 and 1.55 µ m. From the strain characteristics, the following observations are made: (a) In the temperature range from -40 to 20 the fiber strain followed the cable strain quite closely, thus maintaining a tight cable structure and (b) from 20 to 80, the fiber exhibited a lower strain than the cable strain. Furthermore, no loss increase due to temperature change was observed for the 0.5-mm diameter coated fiber and the three type of optical cables.