Las fibras ópticas multimodo de índice graduado (GI) de la serie VHM3000 de Verrillon® son adecuadas para aplicaciones de alta temperatura de hasta 300 °C en entornos con contenido de hidrógeno. El gran ancho de banda de estas fibras permite a los sistemas de detección de temperatura distribuida (DTS) alcanzar una resolución espacial extremadamente corta en despliegues de varios kilómetros de profundidad/larga distancia.
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1 Specialty Optical Fiber © 2014, AFL, all rights reserved. PP-6-00003, Revision 2, 4.27.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 Features • 50/125 graded-index multimode fiber for harsh environments such as oil wells • Excellent resistance to hydrogen darkening at high temperatures and partial pressures of hydrogen • High bandwidth allows sensor systems to achieve extremely short spatial resolutions • Suitable for downhole temperature monitoring applications • Excellent for DTS systems operating in the 1064nm spectral region • Available in all Verrillon’s harsh environments coatings including carbon coating VHM3000 Series Harsh Environment Fibers Verrillon VHM3000 Series is a family of graded-index multimode fibers exhibiting exceptional resistance to hydrogen at high temperatures in hydrogen-rich applications. The true hydrogen resistance is a result of modified glass chemistry. Additionally, the graded-index design provides very high bandwidth for optimum DTS measurement in downhole applications. The VHM3000 Series is available with a variety of Verrillon coatings including Polyimide, Silicone/PFA and Mid-Temp acrylates. Typically, these fibers are used in down-hole monitoring, distributed sensing and imaging applications. Specifications PART NO. MMF-50-6-P-125-6 MMF-50-6-CP-125-6 Description 50/125/155 μm Polyimide coated, Graded Index, Multimode Fiber 50/125/155 μm Carbon/Polyimide coated, Graded Index, 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) < 3.0 < 3.0 Attenuation 2 @ 1300 nm (dB/km) < 1.2 < 1.2 Bandwidth @ 850 nm (MHz-km) > 300 > 300 Bandwidth @ 1300 nm (MHz-km) > 300 > 300 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
© 2014, AFL, all rights reserved. PP-6-00003, Revision 2, 4.27.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 2 Specialty Optical Fiber VHM3000 Series Harsh Environment Fibers Specifications PART NO. MMF-50-6-CSPFA-125-3 MMF-50-6-CSPFA-125-5 Description 50/125/700 μm Carbon/Silicone/PFA coated, Graded Index Multimode Fiber 50/125/400 μm Carbon/Silicone/PFA coated, Graded Index Multimode Fiber PARAMETER VALUE Material Hermetic Coating Carbon Carbon Primary Coating Silicone Silicone Secondary Coating PFA PFA 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 Combined Coating Diameter (μm) 700 ± 50 400 ± 50 Optical NA (nominal) 0.20 0.20 Attenuation 1 @ 850 nm (dB/km) < 3.0 < 3.0 Attenuation 1 @ 1300 nm (dB/km) < 1.2 < 1.2 Bandwidth @ 850 nm (MHz-km) > 300 > 300 Bandwidth @ 1300 nm (MHz-km) > 300 > 300 Mechanical Proof Test (kpsi) > 100 > 100 Operating Temperature (°C) -40 to +200 -40 to +200 1 Measured on loose coil Specifications PART NO. MMF-50-6-CSMTA-125-6 Description 50/125/245 μm Carbon/Silicone/MTA coated, Graded Index, Multimode Fiber PARAMETER VALUE Material Hermetic Coating Carbon Primary Coating Silicone Secondary Coating Mid-Temp 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 Combined Coating Diameter (μm) 245 ± 20 Optical NA (nominal) 0.20 Attenuation @ 850 nm (dB/km) < 3.0 Attenuation @ 1300 nm (dB/km) < 1.2 Bandwidth @ 850 nm (MHz-km) > 300 Bandwidth @ 1300 nm (MHz-km) > 300 Mechanical Proof Test (kpsi) > 100 Operating Temperature (°C) -40 to +150
Características:
- Fibra multimodo de índice graduado 50/125 para entornos difíciles como los pozos de petróleo
- Excelente resistencia al oscurecimiento por hidrógeno a altas temperaturas y presiones parciales de hidrógeno
- Su gran ancho de banda permite a los sistemas de sensores alcanzar resoluciones espaciales extremadamente cortas
- Adecuado para aplicaciones de control de la temperatura en el fondo del pozo
- Excelente para los sistemas DTS que operan en la región espectral de 1064 nm
- Disponible en todos los revestimientos para entornos difíciles de Verrillon’
, incluido el revestimiento de carbono
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