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LMA-YDF-25/250-VIII

25/250 Ytterbium-Doped LMA Double Clad Fiber

Nufern’s 25/250 Ytterbium-doped double clad fiber is ideally suited for high peak power pulsed fiber amplifier applications.  Based on a waveguide structure that supports less modes than the 30/250 fiber, this fiber is incorporated into components and monolithic designs where maintaining beam quality can be more difficult.  Both non-PM and PANDA-style PM fibers are available, as are a range of support fibers 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 & 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 Wavelength1060–1115 nm
Cladding Absorption1.6 ± 0.2 dB/m @ 915 nm
4.8 dB/m @ 975 nm (nominal)
Core Numerical Aperture0.06 ± 0.01
Cladding Numerical Aperture (5%)≥ 0.46

Geometrical & Mechanical Specifications

Core Diameter25.0 ± 2.5 µm
Clad Diameter250.0 ± 10.0 µm
Coating Diameter400 ± 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