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PLMA-YDF-25/400-VIII

25/400 Ytterbium-Doped LMA Double Clad Fibers

Nufern’s 25/400 Ytterbium-doped double clad fiber is ideally suited for high average power pulsed and narrow linewidth CW fiber amplifier applications.  Based on a “few-moded” waveguide structure, this fiber is incorporated into components and monolithic designs where maintaining beam quality can be more difficult. In addition to the standard active fiber, Nufern can supply a matching passive support fiber for component and pigtail development efforts. As with all Nufern standard Large Mode Area (LMA) fibers, these fibers are proof-tested to 100 kpsi, an industry requirement for long term reliability when coiling for mode filtering.

Applications
  • High peak power amplifiers
  • LIDAR
  • Material processing
  • Non-linear optics/frequency doubling
Features & Benefits
  • LMA core design and short amplifier length — Useful for generating high peak powers
  • "Few"-moded core design — Easy to maintain single-mode LP01 beam through fiber and components
  • PANDA-style stress structure for increased birefringence — Superior optical performance and uniformity
  • All fiber proof tested to ≥ 100 kpsi — Critical for ensuring long-term reliability when coiling

Optical Specifications

Operating Wavelength (nominal)1060–1115 nm
Cladding Absorption0.80 ± 0.10 dB/m @ 915 nm
2.4 dB/m @ 975 nm (nominal)
Core Numerical Aperture0.06 ± 0.01
Cladding Numerical Aperture (5%)≥ 0.46
Birefringence (nominal) 3.5 x 10-4

Geometrical & Mechanical Specifications

Core Diameter25.0 ± 2.5 µm
Clad Diameter400.0 ± 15.0 µm
Coating Diameter550 ± 20 µm
Outer Cladding 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