OFS offers erbium-doped fibres designed specifically for L-Band amplifiers operating in the 1565 - 1610 nm region. These fibres give high efficiency, low noise figure, and spectral flatness in L-Band DWDM amplifiers, while reducing the length needed in amplifier designs. We use patented processes to protect against hydrogen-induced loss.
Unit of Measure

Optical Properties


N/A Erbium-Doped Fibres For L-Band

Peak Absorption

N/A near 1530 nm; 33 to 40 dB/m

Cutoff Wavelength

N/A 1100 to 1400 nm

Numerical Aperture

N/A 0.23 to 0.27

Numerical Aperture Tolerance

N/A ± 0.02

Mode Field Diameter

N/A @ 1550 nm, 4.5 to 5.4 µm

PMD (Typical)

N/A ≤ 2 fs/m


N/A @ 1200 nm, < 10 dB/km

PM or SM


Physical Properties

Cladding Diameter

N/A 125 ± 2 µm

Coating Diameter

N/A 250 ± 10 µm

Core/Cladding Concentricity Error

N/A ≤ 0.3 µm

Mechanical and Testing Data

Proof Test Level

N/A 2% 200 kpsi

Order From Location

+45 43 45 8888
Priorparken 680, DK-2605
Broendby, Denmark

Typical Applications

N/A Compact L-Band Amplifiers L-Band DWDM Amplifiers Small-channel Count L-Band Amplifiers


N/A Coils Custom Designs Customized Spectral Shape


N/A Compatible with OASiX® Software Package
Accurate prediction of EDF performance is essential to applications design. OFS offers specialized OASiX Amplifier Simulation System Software, which allows the designer to predict EDFA performance at all pump powers for the specific lot of EDF purchased. OASiX is also available in a DLL version for compatibility with external optimization tools.

Ordering Information

Order By Item #

N/A 76675