The single-mode core of this fiber is co-doped with erbium and ytterbium. It is then surrounded by a silica cladding and covered with a low-index protective coating. The resulting double clad fiber is used for single-mode fiber lasers and amplifiers operating in the 1540 to 1565 nm range.

The fiber enables fiber lasers and amplifiers with good beam profile characteristics, high wall plug efficiencies, compact footprints, superior reliability, and maintenance-free operation. It also accommodates high energies during pulsed operation and at high repetition rates.
Unit of Measure


Core Numerical Aperture

N/A 0.17

Cutoff Wavelength

N/A < 1500 nm

Erbium Peak Absorption

N/A near 1535 nm, 40 dB/m

Mode Field Diameter

N/A @ 1550 nm, 7 µm

Ytterbium Clad Absorption

N/A @ 915 nm, > 0.5 dB/m

Star Cladding Diameter

N/A 130 µm

Coating Outer Diameter

N/A 250 µm

Mechanical and Testing Data

Proof Test Level

N/A 100 kpsi0.689 GPa

How To Order:

Order From Location

+45 43 45 8888
Priorparken 611,
DK-2605 Broendby,

Order By Item #

N/A 108 728 635

Typical Applications

N/A Construction of Multi-Watt Amplifiers around 1550 nm