1 Specialty Optical Fiber © 2015, AFL, all rights reserved. PP-6-00021, Revision 2, 4.29.2020 Specifications are subject to change without notice. AFLglobal.com | 800.235.3423 Specifications PART NO. CF-2-125-0 CF-4-125-20-1 CF-5-125-2 Description 980 nm Acrylate coated, Coupler Fiber, 0.16 NA, 200 kpsi 980 nm Acrylate Coated, Coupler Fiber, 0.20 NA, 200 kpsi 1310/1550 nm Acrylate Coated, Coupler Fiber, 0.13 NA, 200 kpsi PARAMETER VALUE Material Coating Dual UV Acrylate Dual UV Acrylate Dual UV Acrylate Geometry Clad Diameter (μm) 125 ± 1 125 ± 1 125 ± 1 Clad Non-Circularity (%) — ≤ 2 — Core/Clad Offset (μm) ≤ 0.3 ≤ 0.3 ≤ 0.5 Coat Diameter (μm) 245 ± 15 245 ± 15 245 ± 15 Optical NA (nominal) 0.16 0.20 0.13 Attenuation @ 980 nm (dB/m) ≤ 3.0 ≤ 3.5 — Attenuation@ 1310 nm (dB/km) — — ≤ 0.5 Attenuation@ 1550 nm (dB/km) — — ≤ 0.5 Cutoff Wavelength (nm) ≤ 960 ≤ 960 1250 ±40 Mode Field Diameter 1 @ 980 nm (μm) 5.0 ± 0.3 4.2 ± 0.3 — Mode Field Diameter 1 @ 1310 nm (μm) — — 8.6 ± 0.5 Mode Field Diameter 1 @ 1550 nm (μm) — — 9.7 ± 0.5 Bend Loss 2 @ 1310 nm (μm) — — ≤ 0.25 Bend Loss 2 @ 1550 nm (μm) — — ≤ 0.25 Mechanical Tensile Strength (kpsi) ≥ 200 ≥ 200 ≥ 200 Operating Temperature (°C) -40 to +85 -40 to +85 -40 to +85 1 Petermann II Definition 2 10 turns of fiber on a 30 mm diameter mandrel Features • Exhibits lower excess loss in couplers and splitters • High numerical aperture design for low bend loss • Ideal for 980nm pumping of EDFAs • Fully qualified to Telcordia GR-20 • Available Numerical Apertures: 0.20, 0.16, 0.13 and others. Applications • Communications Networks • Optical fused couplers and splitters • Wavelength Division Multiplexing devices (WDMs) • Tap couplers • Optical Add/Drop filters • Fiber pigtails • Erbium-Doped Fiber Amplifiers (EDFAs) VSS200 Series Coupler Fiber Verrillon VSS200 Coupler Fiber products consist of a family of single-mode fibers designed for fused devices manufacturing such as couplers, splitters, WDMs, tap couplers and add/ drop filters for communications and sensing applications. These fibers exhibit exceptionally low optical loss, low excess loss, low insertion loss, as well as low bend-loss due to their high numerical apertures. These coupler fibers are available in all Verrillon coatings and coating combinations and in numerical apertures from 0.13 to 0.20.