The Yb-DCOF-15/125-08-2.7-PM is a double clad PM fiber featuring a 15 µm diameter core with a low photodarkening glass host for sustained long term performance efficiency.


Its near-diffraction-limited output design makes it the perfect choice for laser applications and pulsed fiber lasers and amplifiers requiring superior beam quality. This fiber also features a very high absorption level: 2.7 dB/m at 915 µm.


  • Near-diffraction-limited output design
  • Birefringent fiber
  • Low photodarkening core glass host


  • Pulsed fiber lasers and amplifiers
  • Ultrafast (fs) fiber amplifiers
  • Frequency conversion
  • Material processing

Main specifications

Optical Properties

Core NA 0.08 ± 0.01
Cladding NA > 0.47
Pump guide absorption @ 915 nm 2.7 ± 0.3 dB/m
Nominal pump guide absorption @ 975 nm 10 dB/m
Birefringence ≥ 1.8 x 10-4

Physical Properties

Optical Cladding Double
Core diameter 15 ± 1 µm
Silica cladding diameter 125 ± 1 µm
Coating diameter 245 ± 5 µm
Cladding geometry Round
Core/clad concentricity error < 0.5 µm
Screen proof tested 100 kpsi
Recommended coiling diameter ≥ 6 cm
Confined core No
Depressed cladding No
Price per meter, 1 to 9 meters (in USD)* $420
*Price may vary depending on quantity ordered.
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