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Super Radiation-Hardened Fibers
Sep 2011
Draka Fibre Technology BVRequest Info
AMSTERDAM, Sept. 30, 2011 — Draka Holding NV, part of the Prysmian Group, is introducing two radiation-hardened fibers, the Super RadHard single-mode (SRH-SMF) and Super RadHard multimode (SRH-MMF).

They are built using fluorine as a dopant in the core region, replacing the germanium used in previous versions. Fluorine improves the radiation-induced attenuation (RIA). For the SRH-MMF, the refractive index profile still has a graded-index design, combining high bandwidth (even during and after irradiative circumstances) with low RIA.

RadHard single-mode (RH-SMF) and graded-index multimode fibers have been approved by the US Department of Defense, complying with MIL-PRF-49291 specifications. The company’s Eindhoven fiber plant is MIL-790 quality assurance certified.

The fibers are used in irradiative environments including CERN's Large Hadron Collider (LHC) in Geneva, besides military applications.Within CERN, the company has installed more than 1500 km of RH-SMF inside the LHC tunnel, which is 27 km long and 100 m underground. The RH-MMF has been used in the LHC Atlas detector.

Both fibers are designed for applications in high-energy physics as well as the nuclear industry for uranium enrichment and recycling.


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