10/125 Precision Matched
Passive LMA Fibers
Nufern’s large mode area (LMA) passive single and double clad fibers are ideally suited for applications spanning military,
industrial and medical including linearly polarized fiber lasers and amplifiers. These fibers feature a 10 micron diameter
core and 125 micron diameter clad size with a low NA (0.075) core. They are precision matched to their LMA Yb-doped
10/125 matched counterparts to ensure excellent splice compatibility and low loss. As with all Nufern standard LMA fibers,
these fibers are proof-tested to 100 kpsi, an industry requirement for long term reliability. They utilize the latest fiber design
and the double clad fibers features NuCOAT-FA coating technology to ensure excellent preservation of beam quality and
extended operating life demanded by today’s industrial fiber laser applications.
Typical Applications
• Pulsed fiber lasers and amplifiers
• Material processing
• LIDAR
• Non-linear optics/frequency
doubling
Features & Benefits
• NuCOAT-FA fluoroacrylate coating — Greater fiber durability in extreme environmental operating & storage
conditions
• Bend insensitive — Survives application in tight confines
• Optimized LMA core design — Easy to maintain single mode LP01 beam through fiber & components at high power
• Precision Matched (M) — Providing low splice loss
• All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability
Optical Specifications
LMA-GSF-10/125-M
LMA-GDF-10/125-M
Operating Wavelength
1015 – 1115 nm
1015 – 1115 nm
Core NA
0.075 ± 0.005
0.075 ± 0.005
First Cladding NA (5%)
N/A
≥ 0.46
Core Attenuation
≤ 40.0 dB/km @ 1300 nm
≤ 20.0 dB/km @ 1200 nm
≤ 40.0 dB/km @ 1300 nm
≤ 20.0 dB/km @ 1200 nm
Geometrical & Mechanical
Specifications
Cladding Diameter
125.0 ± 1.0 µm
125.0 ± 1.0 µm
Core Diameter
11.0 ± 1.0 µm
11.0 ± 1.0 µm
Coating Diameter
245.0 ± 10.0 µm
245.0 ± 10.0 µm
Coating Concentricity
< 5.0 µm
< 5.0 µm
Core/Clad Offset
≤ 0.70 µm
≤ 0.70 µm
Clad Non-Circularity
≤ 0.5 %
≤ 0.5 %
Coating Material
Dual Acrylate Coating
Low Index Polymer
NuCOAT-FA
Prooftest Level
≥ 100 kpsi (0.7 GN/m²)
≥ 100 kpsi (0.7 GN/m²)
