1 Specialty Optical Fiber © 2023, AFL, all rights reserved. PP-6-00035, Revision 0, 3.28.2023 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 Specialty optical Fiber Features • Dual-wavelength (1310/1550 nm) single-mode design • Optical properties matching standard SMF for low splice loss • Pure silica core provides excellent resistance to H 2 and moisture in harsh environments • Wide range of protective coatings available, depending on application requirements VHS400 Series Harsh Environment Fibers Verrillon VHS400 Fiber Series is a pure silica core single-mode fiber designed to operate at both 1310 and 1550 nm. These Harsh Environment Fibers from AFL are available in a broad range of coatings including Mid-Temp Dual Acrylates, Polyimide and Carbon. Typically, these fibers are used in sensing applications such as DTS, DSS and DAS. Specifications PART NO. SMF-400-CP-125-1 SMF-400-P-125-1 Description 125/155 μm Carbon/Polyimide Pure Silica Core, Single-mode fiber, 0.12NA, 100 kpsi, 1310/1550 nm Dual Window Operating Wavelength 125/155 μm Polyimide Pure Silica Core, Single-mode fiber, 0.12NA, 100 kpsi, 1310/1550 nm Dual Window Operating Wavelength PARAMETER VALUE Material Hermetic Coating Carbon — Coating Polyimide Polyimide Geometry Clad Diameter (μm) 125 ± 2 125 ± 2 Core/Clad Offset (μm) ≤ 1.5 ≤ 1.5 Coating Diameter (μm) 155 ± 5 155 ± 5 Polyimide Coating Concentricity 1 (%) ≥ 80 ≥ 80 Optical NA (nominal) 0.12 0.12 Attenuation 2 @ 1310 nm (dB/km) ≤ 0.8 ≤ 0.8 Attenuation 2 @ 1550 nm (dB/km) ≤ 0.8 ≤ 0.8 Cutoff Wavelength (nm) 1250 ± 50 1250 ± 50 Mode Field Diameter 3 @ 1310 nm (μm) 9.2 ± 0.6 9.2 ± 0.6 Mode Field Diameter 3 @ 1550 nm (μm) 10.4 ± 0.8 10.4 ± 0.8 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 Petermann II Definition © 2023, AFL, all rights reserved. PP-6-00035, Revision 0, 3.28.2023 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 2 Specialty Optical Fiber Specialty optical Fiber VHS400 Series Harsh Environment Fibers Specifications PART NO. SMF-400-MTDA-125-1 SMF-400-CMTDA-125-1 Description 125/245 μm Mid-Temp Dual Acrylate coated, Single-mode fiber, 0.12NA, 100 kpsi, 1310/1550 nm Dual Window Operating Wavelength 125/245 μm Carbon/Mid-Temp Dual Acrylate coated, Single-mode fiber, 0.12NA, 100 kpsi, 1310/1550 nm Dual Window Operating Wavelength PARAMETER VALUE Material Hermetic Coating — Carbon Primary Coating Mid-Temp Dual Acrylate Mid-Temp Dual Acrylate Secondary Coating Mid-Temp Dual Acrylate Mid-Temp Dual Acrylate Geometry Clad Diameter (μm) 125 ± 2 125 ± 2 Core/Clad Offset (μm) ≤ 1.5 ≤ 1.5 Coating Diameter (μm) 245 ± 10 245 ± 10 Optical NA (nominal) 0.12 0.12 Attenuation 1 @ 1310 nm (dB/km) ≤ 0.8 ≤ 0.8 Attenuation 1 @ 1550 nm (dB/km) ≤ 0.8 ≤ 0.8 Cutoff Wavelength (nm) 1250 ±50 1250 ±50 Mode Field Diameter 2 @ 1310 nm (μm) 9.2 ± 0.6 9.2 ± 0.6 Mode Field Diameter 2 @ 1550 nm (μm) 10.4 ± 0.8 10.4 ± 0.8 Mechanical Proof Test (kpsi) > 100 > 100 Operating Temperature (°C) -40 to +150 -40 to +150 1 Measured on loose coil 2 Petermann II Definition