Thermal Properties of Loose Tube Secondary Coated Optical Fibres Experimentally Discussed by a Relative Light Pulse Delay Technique
Abstract
For silicone primary coated optical fibers in loose tubes it is observed that the 150 C wide temperature interval of no excess loss can be much broader than the temperature interval where the fibre is stress free, and therefore it is most important to be able to control the latter of these intervals as well. The upper limit of this stress free temperature interval is precisely measured by a new interpretation of the temperature versus light propagation time curve, and for the first time it is reported that this upper limit can be controlled over a wide range in agreement with a simple model of the extrusion process. In addition, dynamical relaxation is observed and one result is a shrinkage as low as 0.35 % after 160 hours exposure at 70 C. Loose tube fibres with silicone primary coating and polycarbonate secondary coating show excellent and stable optical and mechanical properties in a large temperature window.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 17, 1983
- Accession Number
- ADP002582
Entities
People
- Hans Damsgard