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CMS-HP

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HP Cladding Mode Suppressed Photosensitive Single-Mode Fiber

Nufern CMS-HP fiber is a photosensitive single-mode fiber designed for the production of complex Bragg grating structures, such as those with high channel count, wherein cladding mode suppression is a fundamental requirement. This fiber sets a new standard for photosensitive telecom fibers, with its excellent cladding mode suppression, high intrinsic photosensitivity, low birefringence, and low polarization mode dispersion (PMD). It allows easy, uniform grating writing; tighter channel spacing; and low splice loss to standard transmission fibers.
Applications
  • Dispersion compensators
  • DWDM gain flattening filters
Features & Benefits
  • Excellent cladding mode suppression—Allows for tighter channel spacing
  • Mode matched to conventional transmission fibers—Low splice loss
  • Designed to achieve low PMD—Enables the development of low PDL devices

Optical Specifications

Operating Wavelength1450–1600 nm
Mode Field Diameter6.5 ± 1.0 µm @ 1550 nm
Second Mode Cut-Off1400 ± 50 nm
Cladding Mode Suppression (nominal)< 0.05 dB for a 35 dB Grating
Core Numerical Aperture (nominal)0.18
Bend Loss for 100 turns @ 25 mm radius< 0.10 dB @ 1550 nm
Bend Radius for 0.05 dB per 100 Turns26 mm @ 1550 nm

Geometrical & Mechanical Specifications

Clad Diameter125.0 ± 1.0 µm
Coating Diameter245 ± 15 µm
Core-Clad Concentricity< 0.5 µm
Coating/Clad Offset≤ 5 µm
Core CompositionPhotosensitive
Coating MaterialUV Cured, Dual Acrylate
Operating Temperature-55 to +85 °C
Short-Term Bend Radius≥ 6 mm
Long-Term Bend Radius≥ 13 mm
Proof Test Level≥ 200 kpsi (1.4 GN/m²)

RoHS Compliant