The single-mode core of this fiber is doped with 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 1040 to 1200 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
Unit of Measure

Optical Specifications

Cladding Numerical Aperture

N/A ≥ 0.45

Background Loss at 1150 nm

N/A ≤ 10 dB/km

Cladding Loss at 1100 nm

N/A ≤ 10 dB/km

Cladding Absorption at 915 nm

N/A 0.8 ± 0.15 dB/m

Mechanical and Testing Data

Proof Test Level

N/A 100 kpsi

Physical and Material Parameters

Coating Type

N/A TrueClad™ Low Index

Fiber Geometry

N/A Star Shape

Fiber Outside Diameter

N/A 253 ± 4 µm

Coating/Cladding Concentricity Error

N/A ≤ 10 µm

Primary Coating Diameter

N/A 325 ± 15 µm

Secondary Coating Diameter

N/A 400 ± 15 µm


Effective Area @ 1070 nm

N/A 170 +10/-15 µm2

Fundamental Mode Bend Loss @Ø12

N/A ≤ 0.1 dB/m

Higher Order Mode Bend Loss @Ø2

N/A ≥40 dB/m