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LMA-YDF-20/400

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20/400 Ytterbium-Doped LMA Double Clad Fiber

Nufern's Large Mode Area (LMA) Ytterbium-doped double clad fiber is ideal for high power fiber lasers and amplifiers used in military, industrial, and medical applications. These fibers enable efficient, compact, diode pumped lasers that directly compete with traditional solid-state lasers. The fiber features a 20 micron diameter core and 400 micron diameter clad size with a low NA (0.06) core. With > 75 % slope efficiency and capable of producing > 700 W of output power, this fiber is suitable for use in single mode applications.

Applications
  • High power fiber lasers
  • CW and pulsed amplifiers
  • Military, industrial and medical
Features & Benefits
  • LMA core design — Useful for generating high CW 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 unformity
  • All fiber proof tested to >100 kpsi — Critical for ensuring long term reliablity when coiling

Optical Specifications

Operating Wavelength1060–1115 nm
Cladding Absorption0.55 ± 0.10 dB/m @ 915 nm
1.7 dB/m @ 975 nm (nominal)
Core Numerical Aperture0.06 ± 0.01
Cladding Numerical Aperture (nominal)0.46

Geometrical & Mechanical Specifications

Core Diameter20.0 ± 2.0 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