| Operating under the marketing label Draka Comteq, Draka Fibre Technology B.V, the Netherlands, develops, produces and markets optical fibres under two different production processes. One of the two processes is a unique system developed in-house by the company's own engineers: the PCVD process (Plasma-activated Chemical Vapour Deposition). The PCVD process is acknowledged world-wide as the best production method for optical fibres, especially the multimode version. The other fibre manufacturing process is MCVD (Modified Chemical Vapour Deposition). Draka Fibre Technology's expert knowledge of the MCVD process results in low-loss single-mode fibres that form the building block for countless high-speed optical communication networks all over the world.
The company has recently introduced a new graded-index 50/125�m multimode fibre, product code 409, that features a 50�m core diameter and a 125�m cladding diameter. The fibre is designed for use at 850nm and/or 1,300nm. This 50/125�m fibre is suitable for use in premises wiring applications, such as LAN (including backbone, riser and horizontal) with video, data and/or voice services using LED, VCSEL and Fabry-Perot laser sources at 850nm or 1,300nm. The multimode fibre is coated with a dual layer UV-curable acrylate, type DLPC9. Designed for more stringent tight-buffer cable applications, the fibre also performs perfectly in loose-tube buffer constructions and demonstrates a high-resistance to micro-bending. The coating offers an excellent stable coating strip force over a wide range of environmental conditions and coating stripping leaves no residues on the bare glass fibre. In tight-buffer applications the entire coating construction (tight buffer and primary coating) can in general very easily be stripped off. The DLPC9 coated fibres show unique high and stable values for the dynamic stress corrosion susceptibility parameter, which offers a greatly improved mechanical protection to the optical fibre when used in harsh environments.
The new graded-index 50/125�m multimode fibre assures full compatibility with legacy systems, such as Ethernet, FDDI, ATM and fibre channel. Because of the nature of the PCVD manufacturing process, this fibre offers the highest bandwidth available in the market. The fibre complies with or exceeds the ITU Recommendation G.651 or the IEC 60793-2-10 type A1a.1 optical fibre specification.
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