Passive components are usually manufactured with a passive fiber that matches the gain fiber as it greatly reduces splicing losses and maximizes transfer efficiency. The DCF-UN-20/125-100 is designed to perfectly match the DCF-YB 20/128P-FAC and is used for manufacturing the output isolator of high peak power pulsed fiber lasers.

Features & Benefits
  • Compatible with industry standards
  • Low background losses
  • Excellent geometrical properties
  • Passive component manufacturing
  • Pulsed fiber laser systems
Core Numerical Aperture
0.100 ± 0.005
Cladding Numerical Aperture
> 0.45
Background Loss @ 1100 nm (dB/km)
< 10.0
Geometrical & Mechanical
Core Diameter (µm)
20 ± 1
Cladding Diameter (µm)
125 ± 2
Core/Cladding Concentricity Error (µm)
≤ 1
Coating Diameter (µm)
260 ± 20

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