PM Erbium-Doped Single-Mode Fiber Nufern’s high performance erbium-doped fiber and industry leading PM PANDA-style fiber capabilities are combined in a unique PM erbium fiber product, PM-ESF-7/125. Featuring a high erbium concentration (peak absorption 55 dB/m) and high pump conversion efficiency achieved with proprietary technology that delivers industry leading tolerances on the key spectroscopic parameters. The non-PM SM-ESF-7/125 is also available for applications that do not require a polarized signal. Typical Applications Features & Benefits • PM amplifiers • PANDA-style stress structure for increased birefringence — superior optical performance and uniformity • Polarized lasers • High Er dopant concentration — enables short length devices • Ultra-short pulse laser • High efficiency — good conversion of pump to signal power Optical Specifications Operating Wavelength Operating Wavelength (nominal) Core NA Mode Field Diameter Cutoff Normalized Cross Talk Core Absorption Birefringence PM-ESF-7/125 SM-ESF-7/125 1530 – 1610 nm N/A 0.150 8.8 ± 1.0 µm @ 1550 nm 9.1 ± 1.0 µm @ 1620 nm 1460 ± 60 nm ≤ - 35.0 dB at 4 m @ 1300 nm 55.0 ± 5.0 dB/m near 1530 nm 3.5 × 10⁻⁴ N/A 1550 nm 0.150 8.8 ± 1.0 µm @ 1550 nm 9.1 ± 1.0 µm @ 1620 nm 1400 ± 60 nm N/A 125.0 ± 1.5 µm 7.0 µm 245.0 ± 15.0 µm < 5.0 µm ≤ 0.50 µm Depressed UV Cured, Dual Acrylate -40 to 85 °C ≥ 100 kpsi (0.7 GN/m²) 125.0 ± 1.5 µm 7.0 µm 245.0 ± 15.0 µm < 5.0 µm ≤ 0.50 µm N/A UV Cured, Dual Acrylate -40 to 85 °C ≥ 100 kpsi (0.7 GN/m²) 55.0 ± 5.0 dB/m near 1530 nm N/A Geometrical & Mechanical Specifications Cladding Diameter Core Diameter Coating Diameter Coating Concentricity Core/Clad Offset First Cladding Material Coating Material Operating Temperature Range Prooftest Level 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. NU0059- 12/16/2011