Ytterbium doped double clad fiber YDF-DC-6/125

Photodarkening free Yb-doped DC fiber
Application notes:

YDF-DC-6/125 series is specially designed for highly efficient high-reliability CW lasers operating in the 1.03-1.08 µm spectral range. Flat absorption in the range of 910-965 nm and specially designed polymer coating allow usage of laser based on such fibers in an extra wide temperature range (-60..+60°C).

Article YDF-DC-6/125   

Typical inner clad absorption

Fiber specifications

Fiber ID


Core diameter, µm 6.0 ± 0.5
Clad diameter, µm 125 ± 3
Clad shape  octagonal
Core NA 0.16 ± 0.02
Clad NA 0.44 ± 0.02
Cutoff wavelength, µm 1.03 ± 0.02
Clad absorption (915 nm), dB/m 0.35 ± 0.05
Clad absorption (976 nm), dB/m   ~ 2
Core/clad background loss (1150 nm), dB/km < 30
Effective pumping range, µm 0.91 – 0.984
Photodarkening resistance   >20 times better compare to the Al2O3-SiO2 Yb-doped fiber

Other parameters including PM version are available on the request

 Ytterbium doped fiber (Article YDF-DC-6/125)