La fibre multimode à gradient d'indice et insensible à la courbure de la série Verrillon VHM7000 d'AFL est adaptée aux températures moyennes où le revêtement de carbone constitue une véritable barrière contre la diffusion d'hydrogène qui provoque une absorption optique indésirable dans la région spectrale de fonctionnement de la plupart des capteurs optiques. Il présente l'avantage supplémentaire d'une faible perte de courbure, ce qui permet de l'utiliser dans des applications à courbure extrêmement serrée.
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1 Specialty Optical Fiber © 2020, AFL, all rights reserved. PP-6-00009, Revision 1, 5.7.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 Features • 50/125 μm graded-index multimode fiber • Suitable for use in low/mid-temperature, low hydrogen environments • Highly bend- insensitive for tight bend applications • Carbon coating provides exceptional resistance to H2 and moisture ingression • Wide range of protective coatings available, depending on application requirements VHM7000 Series Fibers AFL's Verrillon VHM7000 Series graded-index, bend-insensitive multimode fiber is suitable for mid-range temperatures where the carbon coating is a true barrier against hydrogen diffusion that causes undesirable optical absorption in the operating spectral region of most optical sensors. It has the added benefit of low bend loss for use in tight bend applications. With their optimized optical design, VHM7000 fibers are engineered to operate under extremely small bend radii down to 7.5 mm. The low bend loss provided by VHM7000 Series fiber makes it the fiber to use in tight bend applications. VHM7000 is available with polyimide, silicone-PFA, silicone-MTA, MTDA and carbon coatings which allow it to withstand high temperatures and hydrogen-containing atmospheres. Carbon coating can be applied to provide hermeticity against water and hydrogen in downhole applications and for fatigue resistance in long-term deployments. VHM7000 is available at prooftest levels of 100 kpsi and 200 kpsi. Specifications PART NO. MMF-50-7-CMTDA-125-2 MMF-50-7-CMTDA-125-7 Description 50/125/245 μm Carbon/Mid-Temp Dual Acrylate Bend Insensitive, Multimode Fiber, 200 kpsi 50/125/245 μm Carbon/Mid-Temp Dual Acrylate Bend Insensitive, Multimode Fiber, 100 kpsi PARAMETER VALUE VALUE Material Hermetic Coating Carbon Carbon Coating Mid-Temp Dual Acrylate Mid-Temp Dual Acrylate Geometry Core Diameter (μm) 50 ± 2.5 50 ± 2.5 Clad Diameter (μm) 125 ± 2 125 ± 2 Core Non-Circularity (%) < 5 < 5 Clad Non-Circularity (%) < 1 < 1 Core/Clad Offset (μm) < 1.5 < 1.5 Coating Diameter (μm) 245 ± 10 245 ± 10 Optical NA (nominal) 0.20 0.20 Attenuation 1 @ 850 nm (dB/km), @ 1300 nm (dB/km) < 2.5, < 0.7 < 2.5, < 0.7 Bandwidth @ 850 nm (MHz-km), @ 1300 nm (MHz-km) > 500, > 500 > 500, > 500 Bend Loss 2 @ 850 nm (dB), @ 1300 nm (dB) < 0.2, < 0.5 < 0.2, < 0.5 continued
© 2020, AFL, all rights reserved. PP-6-00009, Revision 1, 5.7.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 2 Specialty Optical Fiber Specifications PART NO. MMF-50-7-P-125-7 MMF-50-7-CP-125-7 Description 50/125/155 μm Polyimide coated Bend Insensitive, Multimode Fiber 50/125/155 μm Carbon/Polyimide coated Bend Insensitive, Multimode Fiber PARAMETER VALUE Material Hermetic Coating — Carbon Coating Polyimide Polyimide Geometry Core Diameter (μm) 50 ± 2.5 50 ± 2.5 Clad Diameter (μm) 125 ± 2 125 ± 2 Core Non-Circularity (%) < 5 < 5 Clad Non-Circularity (%) < 1 < 1 Core/Clad Offset (μm) < 1.5 < 1.5 Coating Diameter (μm) 155 ± 5 155 ± 5 Polyimide Coating Concentricity 1 (%) > 80 > 80 Optical NA (nominal) 0.20 0.20 Attenuation 2 @ 850 nm (dB/km), @ 1300 nm (dB/km) < 3.0, < 1.2 < 3.0, < 1.2 Bandwidth @ 850 nm (MHz-km), @ 1300 nm (MHz-km) > 500, > 500 > 500, > 500 Bend Loss 3 @ 850 nm (dB), @ 1300 nm (dB) < 0.2, < 0.5 < 0.2, < 0.5 Mechanical Proof Test (kpsi) > 100 > 100 Operating Temperature (°C) -65 to +300 -65 to +300 1 Measured as (Min Wall/Max Wall) x 100 2 Measured on loose coil 3 Two turns on 7.5 mm radius mandrel VHM7000 Series Fibers PART NO. MMF-50-7-CMTDA-125-2 MMF-50-7-CMTDA-125-7 Description 50/125/245 μm Carbon/Mid-Temp Dual Acrylate Bend Insensitive, Multimode Fiber, 200 kpsi 50/125/245 μm Carbon/Mid-Temp Dual Acrylate Bend Insensitive, Multimode Fiber, 100 kpsi Mechanical Proof Test (kpsi) > 200 > 100 Operating Temperature (°C) -40 to +150 -40 to +150 1 Measured on loose coil 2 Two turns on 7.5 mm radius mandrel Specifications (cont.)
3 Specialty Optical Fiber © 2020, AFL, all rights reserved. PP-6-00009, Revision 1, 5.7.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 VHM7000 Series Fibers Specifications PART NO. MMF-50-7-MTDA-125-7 Description 50/125/245 μm Mid-Temp Dual Acrylate coated Bend Insensitive, Multimode Fiber PARAMETER VALUE Material Coating Mid-Temp Dual Acrylate Geometry Core Diameter (μm) 50 ± 2.5 Clad Diameter (μm) 125 ± 2 Core Non-Circularity (%) < 5 Clad Non-Circularity (%) < 1 Core/Clad Offset (μm) < 1.5 Coating Diameter (μm) 245 ± 10 Optical NA (nominal) 0.20 Attenuation 1 @ 850 nm (dB/km), @ 1300 nm (dB/km) < 2.5, < 0.7 Bandwidth @ 850 nm (MHz-km), @ 1300 nm (MHz-km) > 500, > 500 Bend Loss 2 @ @ 850 nm (dB), @ 1300 nm (dB) < 0.2, < 0.5 Mechanical Proof Test (kpsi) > 100 Operating Temperature (°C) -40 to +150 1 Measured on loose coil 2 Two turns on 7.5 mm radius mandrel
Caractéristiques :
- Fibre multimode à gradient d'indice 50/125 µ
m - Convient pour une utilisation dans des environnements à basse/moyenne température et à faible teneur en hydrogène
- Hautement insensible aux courbures pour les applications à courbures serrées
- Le revêtement en carbone offre une résistance exceptionnelle aux infiltrations d'hydrogène et d'humidité.
- Une large gamme de revêtements de protection est disponible, en fonction des exigences de l'application.
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