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PM-YTF-5/105/125

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5 µm Triple Clad Ytterbium-Doped Polarization Maintaining Fiber

Nufern’s Yb-doped triple-clad fibers are specifically designed to match industry standard diode power delivery fibers.

As with our highly successful double clad fiber series these fibers are available with either single-mode or Nufern’s robustly single-mode LMA core technology. These fibers incorporate PANDA-style stress elements for superior polarization maintaining properties. The triple clad fibers utilize an additional 0.23 NA inner glass cladding waveguide. This additional feature ensures splice-ability with beam or pump delivery fibers and high power connectorization. It additionally provides an all glass primary waveguide for highest long-term power level capacity.

Applications
  • PM fiber lasers and amplifier
  • Very high powr PM fiber lasers & amplifiers
  • Lasrs & amplifiers with classically spliced pumps
  • Connectorized lasers & amplifiers
Features & Benefits
  • LMA core technology—Robustly single-mode high output power with reduced non-linearities
  • 0.23 NA inner glass cladding—Compatibility to fiber coupled pumps, compatibility to standard connectors
  • PANDA-style PM—Superior performance
  • Proprietary low index coating—Captures otherwise spilled light in challenging designs

Optical Specifications

Operating Wavelength1060–1115 nm
Mode Field Diameter7 ± 1 µm @ 1060 nm
Second Mode Cut-Off960 ± 70 nm
Cladding Absorption0.80 ± 0.15 dB/m @ 915 nm
2.5 dB/m @ 975 nm (nominal)
Core Numerical Aperture (nominal)0.12
Inner Cladding Numerical Aperture (nominal)0.23
Outer Cladding Numerical Aperture (nominal)0.46
Birefringence (nominal) 2.0 x 10-4

Geometrical & Mechanical Specifications

Inner Clad Diameter105.0 ± 5.0 µm
Outer Clad Diameter125.0 ± 1.0 µm
Coating Diameter245 ± 15 µm
Inner Cladding MaterialSilica
Outer Cladding MaterialGlass
Coating MaterialLow Index Polymer
Proof Test Level≥ 100 kpsi (0.7 GN/m2)

Note: Perfectly matched passive versions are available for many of our active fibers.
See our Component and Delivery Fibers cheat sheet. (PDF)

RoHS Compliant