The DCF-YB-6/128S shows excellent photodarkening resistance performance ensuring high reliability and long-term stability. This fiber is designed for single-mode operation and shows  high absorption, which is ideal for high-power pulsed fiber lasers and amplifiers used for industrial applications.

Features & Benefits
  • Single-mode operation for excellent beam quality
  • Very low photodarkening at high power – ensures stable long-term operation
  • High efficiency – reduces pump power requirements
  • Medium power CW or pulsed lasers & amplifiers
  • Pre-amplifier section of multi-stage high-power amplifiers
  • Material processing
  • Scientific
Cladding Absorption @ 915 nm (dB/m)
0.55 ± 0.10
Cladding Absorption @ 975 nm (nominal) (dB/m)
Core Numerical Aperture (Typical)
Cladding Numerical Aperture
> 0.45
Background loss @1200nm (dB/km)
< 10
Geometrical & Mechanical
Core Diameter (µm)
6 ± 1
Cladding Diameter (µm)
128 ± 3
Core/Cladding Concentricity Error (µm)
< 1.0
Coating Diameter (µm)
260 ± 20

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