19 PROPERTIES OF 180µm-COATED BEND-INSENSITIVE FIBRE WITH 125µm CLADDING DIAMETER: \ Fully compliant with ITU-T recommendations G.652.D and G.657.A2 \ Microbending sensitivity similar / better than 245μm and 200μm coated fibres. \ Can be spliced with legacy fibres using conventional tools and fusion splicers. Fusion splicing tests proved full backward compatibility with legacy fibres. Tests ensured that no problems exist with the 180μm coated G.657.A2 trench fibre and verify backward compatibility with 245μm- and 200μm coated fibres. \ Excellent mechanical reliability. The 180μm-coated G.657.A2 trench fibre meets all existing requirements for stripping, tensile strength, and fatigue properties (in accordance with IEC 60793-2- 50 for type B fibres). There was no difficulty in cleanly stripping the 180μm coatings with commonly used tools. \ Strength at 50% probability of breakage was always above the 550kpsi lower limit specified by the Standard, before and after aging treatments. \ The smallest 180μm diameter has a cross-section about half of that of 245μm coated fibres, for tighter fibre packing densities and cable miniaturization. \ A 576-fiber micro-duct cable with a diameter of 8.2mm, yielding a record fibre density of 10.9fiber/mm² for such cables, was successfully fabricated. Given the excellent optical and mechanical performance of the 180μm coated bendinsensitive fibre, we fabricated several microduct cables with 192 to 576 of such fibres. Their standard structures are based on loose tubes with a diameter of just 1.2mm, each containing 24 fibres, around a central strength member. The 576-fibre cable has a 8.2mm diameter and yielded a density of 10.9 fibre/mm² – a record for such cables - and a weight of only 66kg/km. It is compliant with IEC 60794-1-21 optical and mechanical specifications. INSIGHT | Tracking the Future
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