Polarization Maintaining 980 nm
Telecommunication Fibers
Nufern’s Polarization Maintaining Telco fibers are designed for today's most advanced networks. Optimized for use at
980 nm, these fibers are used in all PM applications for data and telecom. Nufern has applied its unique manufacturing
facility and capabilities to this product area and has established leading optical, mechanical and geometrical tolerances.
The bend insensitive versions of our fibers offer lowest bend loss and extinction ratios at small bend diameters enabling
our customers to reduce package sizes. Available in either 250 or 400 micron coating diameters and prooftested to 200 kpsi,
Nufern's PM fibers will meet the demands of all current and future applications.
Typical Applications
• Pump pigtails
• Grating stabilizers
• PM patchcords
• Polarization sensitive devices
Features & Benefits
• Tight specifications — Highly deterministic results, highest product yield
• High fatigue failure resistance — Longest service life
• Bend insensitive — Survives application in tight geometries (B version)
• All fiber proof tested to > 200 kpsi — Critical for ensuring long term reliability
Optical Specifications
PM980-XP
PM980B-XP
PM980-400
PM980B-400
Operating Wavelength
970 – 1550 nm
970 – 1550 nm
970 – 1550 nm
970 – 1550 nm
Core NA
0.120
0.120
0.120
0.120
Mode Field Diameter
6.6 ± 0.5 µm @ 980 nm
6.6 ± 0.5 µm @ 980 nm
6.6 ± 0.5 µm @ 980 nm
6.6 ± 0.5 µm @ 980 nm
Maximum Bend Loss
N/A
0.5 dB at 980 nm, 25 mm
OD, 10 turns
N/A
0.5 dB at 980 nm, 25 mm
OD, 10 turns
Cutoff
920 ± 50 nm
920 ± 50 nm
920 ± 50 nm
920 ± 50 nm
Core Attenuation
≤ 2.5 dB/km @ 980 nm
≤ 2.5 dB/km @ 980 nm
≤ 2.5 dB/km @ 980 nm
≤ 2.5 dB/km @ 980 nm
Beat Length
≤ 2.7 mm @ 980 nm
≤ 2.7 mm @ 980 nm
≤ 2.7 mm @ 980 nm
≤ 2.7 mm @ 980 nm
Normalized Cross Talk
≤ - 40.0 dB at 4 m @ 980
nm
≤ - 30.0 dB at 100 m @
980 nm
≤ - 40.0 dB at 4 m @ 980
nm
≤ - 30.0 dB at 100 m @
980 nm
≤ - 40.0 dB at 4 m @ 980
nm
≤ - 30.0 dB at 100 m @
980 nm
≤ - 40.0 dB at 4 m @ 980
nm
≤ - 30.0 dB at 100 m @
980 nm
Bending Cross Talk
N/A
-30 dB at 980 nm, 25 mm
OD, 10 turns
N/A
-30 dB at 980 nm, 25 mm
OD, 10 turns
Geometrical & Mechanical
Specifications
Cladding Diameter
125.0 ± 1.0 µm
125.0 ± 1.0 µm
125.0 ± 1.0 µm
125.0 ± 1.0 µm
Core Diameter
5.5 µm
5.5 µm
5.5 µm
5.5 µm
Coating Diameter
245.0 ± 15.0 µm
245.0 ± 15.0 µm
400.0 ± 15.0 µm
400.0 ± 15.0 µm
Coating Concentricity
< 5.0 µm
< 5.0 µm
< 10.0 µm
< 10.0 µm
Core/Clad Offset
≤ 0.50 µm
≤ 0.50 µm
≤ 0.50 µm
≤ 0.50 µm
Coating Material
UV Cured, Dual Acrylate
UV Cured, Dual Acrylate
UV Cured, Dual Acrylate
UV Cured, Dual Acrylate
Operating Temperature Range
-40 to 85 °C
-40 to 85 °C
-40 to 85 °C
-40 to 85 °C
Prooftest Level
≥ 200 kpsi (1.4 GN/m²)
≥ 200 kpsi (1.4 GN/m²)
≥ 200 kpsi (1.4 GN/m²)
≥ 200 kpsi (1.4 GN/m²)
