1 Specialty Optical Fiber © 2014, AFL, all rights reserved. PP-6-00011, Revision 2, 4.27.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 Features • Step-index multimode fiber with pure silica core • Suitable for applications in hydrogen-rich environments • Wide range of protective coatings available, depending on application requirements • Excellent for deployment in shallow wells where extremely short spatial resolution is not required VHM4000 Series Harsh Environment Fibers Verrillon ® VHM4000 product is a multimode step-index with a pure silica core for high resistance to hydrogen darkening. This product is available in both 50/125 and 62.5/125 versions. This design is available in a variety of coatings including Polyimide, high temperature acrylates, Silicone-PFA and hermetic Carbon. Typically, these fibers are used in down-hole distributed sensing and imaging applications where the temperature and hydrogen partial pressures are extreme. Due to its step index design, the VHM4000 product is suitable for short distance applications where the spatial resolution requirements are not extreme. Specifications PART NO. MMF-50-5-P-125-5 MMF-62.5-5-P-125-5 Description 50/125/155 μm Polyimide coated, Step Index, Multimode Fiber 62.5/125/155 μm Polyimide coated, Step Index, Multimode Fiber PARAMETER VALUE Material Coating Polyimide Polyimide Geometry Core Diameter (μm) 50 ± 3.0 62.5 ± 3.0 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 0.22 Attenuation 2 @ 850 nm (dB/km) ≤ 3.0 ≤ 3.0 Attenuation 2 @ 1060 nm (dB/km) ≤ 1.3 ≤ 1.3 Attenuation 2 @ 1300 nm (dB/km) ≤ 1.0 ≤ 1.0 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-6-00011, Revision 2, 4.27.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 2 Specialty Optical Fiber VHM4000 Series Harsh Environment Fibers Specifications PART NO. MMF-50-5-CP-125-5 Description 50/125/155 μm Carbon/Polyimide coated, Step Index, Multimode Fiber PARAMETER VALUE Material Hermetic Carbon Coating Polyimide Geometry Core Diameter (μm) 50 ± 3.0 Clad Diameter (μm) 125 ± 2 Core Non-Circularity (%) ≤ 5 Clad Non-Circularity (%) ≤ 1 Core/Clad Offset (μm) ≤ 1.5 Coating Diameter (μm) 155 ± 5 Polyimide Coating Concentricity 1 (%) ≥ 80 Optical NA (nominal) 0.20 Attenuation 2 @ 850 nm (dB/km) ≤ 3.0 Attenuation 2 @ 1060 nm (dB/km) ≤ 1.3 Attenuation 2 @ 1300 nm (dB/km) ≤ 1.0 Mechanical Proof Test (kpsi) ≥ 100 Operating Temperature (°C) -65 to +300 1 Measured as (Min. Wall/Max. Wall) x 100 2 Measured on loose coil Specifications PART NO. MMF-50-5-CMTDA-125-5 Description 50/125/245 μm Carbon/Mid-Temp Dual Acrylate, Step Index, Multimode Fiber PARAMETER VALUE Material Hermetic Coating Carbon Primary Coating Mid-Temp Dual Acrylate Secondary 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 ± 5 Optical NA (nominal) 0.20 Attenuation 1 @ 850 nm (dB/km) ≤ 3.0 Attenuation 1 @ 1300 nm (dB/km) ≤ 1.0 Mechanical Proof Test (kpsi) ≥ 100 Operating Temperature (°C) -40 to +150 1 Measured on loose coil 3 Specialty Optical Fiber © 2014, AFL, all rights reserved. PP-6-00011, Revision 2, 4.27.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 VHM4000 Series Harsh Environment Fibers Specifications PART NO. MMF-105-1-P-125-150-2 MMF-110-1-P-121-140-1 Description 105/125/150 μm Polyimide coated, Low OH, Step Index, Multimode Fiber, 0.15 NA 110/121/140 μm Polyimide coated, Low OH, Step Index, Multimode Fiber, 0.22 NA PARAMETER VALUE Material Coating Polyimide Polyimide Geometry Core Diameter (μm) 105 ± 5 110 ± 7 Clad Diameter (μm) 125 ± 3 121 ± 5 Core/Clad Offset (μm) ≤ 3.0 ≤ 3.0 Coating Diameter (μm) 150 ± 5 140 ± 5 Optical NA (nominal) 0.15 0.22 Attenuation 1 @ 808 nm (dB/km) ≤ 15 ≤ 15 Mechanical Proof Test (kpsi) ≥ 100 ≥ 100 Operating Temperature (°C) -65 to +300 -65 to +300 1 Measured on loose coil Specifications PART NO. MMF-105-5-CA-125-250-22 MMF-105-5-CA-125-250-15 Description 105/125/250 μm Carbon/Acrylate coated, Low OH, Silica Core, Step Index, Multimode Fiber, 0.22 NA 105/125/250 μm Carbon/Acrylate coated, Low OH, Silica Core, Step Index, Multimode Fiber, 0.15 NA PARAMETER VALUE Material Hermetic Coating Carbon Carbon Coating Dual UV Acrylate Dual UV Acrylate Geometry Core Diameter (μm) 105 ± 5 105 ± 5 Clad Diameter (μm) 125 ± 3 125 ± 3 Core/Clad Offset (μm) ≤ 3.0 ≤ 3.0 Coating Diameter (μm) 250 ± 10 250 ± 10 Optical NA (nominal) 0.22 0.15 Attenuation 1 @ 808 nm (dB/km) ≤ 20 ≤ 20 Mechanical Proof Test (kpsi) ≥ 100 ≥ 100 Operating Temperature (°C) -40 to +85 -40 to +85 1 Measured on loose coil © 2014, AFL, all rights reserved. PP-6-00011, Revision 2, 4.27.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 4 Specialty Optical Fiber VHM4000 Series Harsh Environment Fibers Specifications PART NO. MMF-200-1-A-240-400-1 Description 200/240/400 Acrylate coated, Low OH, Silica Core, Step Index Multimode Fiber, 0.22 NA, 100 kpsi Proof Test PARAMETER VALUE Material Hermetic Coating UV Acrylate Coating UV Acrylate Geometry Core Diameter (μm) 200 ± 8 Clad Diameter (μm) 240 ± 6 Core/Clad Offset (μm) ≤ 3.0 Combined Coating Diameter (μm) 400 ± 25 Optical NA (nominal) 0.22 Attenuation @ 850 nm (dB/km) ≤ 10 Mechanical Proof Test (kpsi) ≥ 100 Operating Temperature (°C) -40 to +85