High power 1550 nm amplifiers based on double clad Er/Yb fibers are widely used in CATV and Telecom applications.
The 1550 nm passive double clad fiber is ideal for use both as a pump and signal output fiber in combiners and as a laser
delivery fiber. The high cut-off, bend insensitive design of this fiber ensures excellent signal confinement, while allowing for
low splice loss to Er/Yb doped double clad fibers and industry standard SMF-28™ fiber. They are available in both non-PM
design for traditional high power amplifiers and in PANDA-style PM design for high power coherent communications and
frequency conversion applications.
Typical Applications
• CATV and Telecom amplifiers
• Laser delivery/fluorescence
Features & Benefits
• NuCOAT™ fluorocrylate coating – Greater fiber durability in extreme environmental operating & storage conditions
• Exceptional uniformity and core/clad concentricity — Low connectorization losses
• Bend insensitive — Survives application in tight confines
• All fiber proof tested to > 100 kpsi — Critical for ensuring long term reliability
Optical Specifications
PM-GDF-1550
SM-GDF-1550
Operating Wavelength
1450 – 1600 nm
1450 – 1600 nm
Core NA
0.120
0.120
First Cladding NA (5%)
≥ 0.46
≥ 0.460
Mode Field Diameter
10.5 ± 0.7 µm @ 1550 nm
10.5 ± 0.7 µm @ 1550 nm
Cutoff
1440 ± 80 nm
1440 ± 80 nm
Core Attenuation
≤ 2.0 dB/km @ 1550 nm
≤ 1.00 dB/km @ 1550 nm
Cladding Attenuation
≤ 15.0 dB/km @ 1095 nm
≤ 15.0 dB/km @ 1095 nm
Birefringence
2.5 × 10⁻⁴
N/A
Geometrical & Mechanical
Specifications
Cladding Diameter
130.0 ± 1.0 µm
125.0 ± 1.0 µm
Core Diameter
9 µm
9 µm
Coating Diameter
245.0 ± 10.0 µm
245.0 ± 10.0 µm
Coating Concentricity
< 5.0 µm
< 5.0 µm
Core/Clad Offset
≤ 0.50 µm
≤ 0.50 µm
Prooftest Level
≥ 100 kpsi (0.7 GN/m²)
≥ 100 kpsi (0.7 GN/m²)
