1550 nm Single-Mode Double Clad Coupler Fiber Nufern's single-mode double clad coupler fiber is designed for 1550 nm amplifier modules utilizing higher power multimode pumps. With a core designed to match SMF-28™ and an inner cladding glass-on-glass structure optimized to accept multimode pump energy, this fiber is ideal for the signal leg in high power CATV couplers. Typical Applications Features & Benefits • CATV pump/signal couplers • Single-mode core — Low splice loss to SMF • Laser delivery/fluorescence • Glass-on-glass double clad structure — Compatible with Nufern Power Delivery Fibers • Exceptional geometric uniformity and core/clad concentricity — Superior fiber diameter tolerances Optical Specifications Operating Wavelength (nominal) Core NA Mode Field Diameter Cutoff Core Attenuation SM-9/105/125-20A 1550 nm 0.120 10.5 ± 0.7 µm @ 1550 nm 1250 ± 60 nm ≤ 0.5 dB/km @ 1550 nm Geometrical & Mechanical Specifications First Cladding Diameter (inner) Second Cladding Diameter Core Diameter Coating Diameter First Cladding Material Coating Material Prooftest Level 105.0 ± 5.0 µm 125 ± 1 µm 9.0 µm 245.0 ± 15.0 µm Glass Inner Cladding UV Cured, Dual Acrylate ≥ 100 kpsi (0.7 GN/m²) 7 Airport Park Road, East Granby, CT 06026 • 860.408.5000 • Toll-free 866.466.0214 • Fax 860.844.0210 E-mail info @ nufern.com • www.nufern.com Nufern products are manufactured under an ISO 9001:2008 certified quality management system. Standard specifications and design parameters are listed above. Specifications are subject to change without notice. Other configurations such as alternative form factors, optimized cut-off and UV cured color coating may be available. Let us know how Nufern can assist with your requirements. NU0100- 12/16/2011