1550 nm Select Cutoff
Single-Mode Fibers
Nufern’s 1550B-HP high-performance select cutoff bend insensitive single-mode fiber is optimized for use in small form
factor active and passive components requiring tight bend radii. With a bend loss considerably lower than SMF-28™, 1550B
HP is ideal for the video leg in FTTH CWDM and applications such as smaller form factor C and L-band components and low
NA planar waveguides.
Typical Applications
• FTTx components and modules
• Compact C and L-band components
• Low NA planar waveguides
• Metro components
Features & Benefits
• Optimized cutoff for 1550 nm wavelength — Extremely low bend loss
• Tight mechanical and optical tolerances — high yield component manufacturing
• Mode matched to SMF-28 — Low splice loss to standard fibers
• High proof test for tighter bends — Critical for long-term reliability in tight bend applications
Optical Specifications
1550B-HP
1550B-HP-80
Operating Wavelength
1460 – 1620 nm
1460 – 1620 nm
Core NA
0.130
0.130
Mode Field Diameter
9.5 ± 0.5 µm @ 1550 nm
9.5 ± 0.5 µm @ 1550 nm
Cutoff
1400 ± 50 nm
1400 ± 50 nm
Core Attenuation
≤ 0.5 dB/km @ 1550 nm
≤ 0.5 dB/km @ 1550 nm
Geometrical & Mechanical
Specifications
Cladding Diameter
125.0 ± 1.0 µm
80.0 ± 1.0 µm
Core Diameter
9.0 µm
9.0 µm
Coating Diameter
245.0 ± 15.0 µm
165.0 ± 10.0 µm
Coating Concentricity
< 5.0 µm
< 5.0 µm
Core/Clad Offset
≤ 0.50 µm
≤ 0.50 µm
Coating Material
UV Cured, Dual Acrylate
UV Cured, Dual Acrylate
Operating Temperature Range
-55 to 85 °C
-55 to 85 °C
Short Term Bend Radius
≥ 6 mm
≥ 4 mm
Long Term Bend Radius
≥ 13 mm
≥ 9 mm
Prooftest Level
≥ 200 kpsi (1.4 GN/m²)
≥ 200 kpsi (1.4 GN/m²)
