Polarization Maintaining Fiber

Photosensitive 980 nm
Polarization Maintaining Fiber

Nufern photosensitive 980 nm polarization maintaining fiber is designed to perform all functions of a 980 nm PM fiber
but with enhanced photosensitivity for fabrication of gratings. This fiber is designed for use in pump diodes, couplers and
multiplexers. PS-PM980 allows component manufacturers to make low cost fibertails for 980 nm pumps. Using one fiber
that provides excellent photosensitivity, as well as polarization maintaining attributes, substantially reduces writing
time thus lowering costs.

Optical Specifications PS-PM980
Operating Wavelength (nominal) 980 nm
Mode Field Diameter 6.6 ± 1.0 μm @ 980 nm
Second Mode Cut-Off 900 ± 70 nm
Attenuation < 3.0 dB/km @ 980 nm
Beat Length < 3.3 mm @ 980 nm
Normalized Cross Talk < - 40 dB at 2 meters
Normalized Cross Talk (nominal) < - 25 dB at 100 meters
Geometrical &
Mechanical Specifications
Clad Diameter 125.0 ± 1.5 μm
Coating Diameter 245 ± 15 μm
Core-Clad Concentricity < 0.5 μm
Coating/Clad Offset < 5 μm
Proof Test Level > 100 kpsi (0.7 GN/m2)
Coating Material UV Cured, Dual Acrylate
Operating Temperature - 40 to +85º C

Typical Applications
• Grating-based pump diode pigtails
• Couplers
• Multiplexers
Features & Benefits
• PANDA-style stress structure for increased birefringence — Superior optical performance and uniformity
• High photosensitivity — Enables low cost, high yield grating fabrication
• Tightly controlled specifications — Excellent uniformity