Phosphorus doped fiber
PDF-5/125
Phosphorus doped fiber PDF-5/125 series are specially designed for highly efficient Raman lasers and amplifiers operating in the 1.1-1.6 µm spectral range. The main advantage of phosphorus-doped fiber is a three times higher value of the Raman shift as compared to germanium-doped fibers. This feature allows one to strongly simplify the Raman fiber laser and amplifier design. For example, to construct a high-power laser @ 1480nm required for pumping Er-doped fibers, only two cascades of Raman wavelength transformation are necessary, whereas six cascades are necessary in the case of Ge-doped fibers

 

Phosphorus doped fiber

PDF-5/125-P

PDF-5/125-A

Fiber quality parameter, Pf< 1> 1
Core diameter, µm5.0 ± 0.55.0 ± 1
Clad diameter, µm125 ± 1125 ± 1
Core NA0.17 ± 0.020.17 ± 0.02
Cutoff wavelength, µm0.9 ± 0.20.9 ± 0.2
Optical loss (1064 nm), dB/km< 2.0< 2.9
Optical loss (1240 nm), dB/km< 1.2< 1.95
Optical loss (1480 nm), dB/km< 1.0< 1.45
Raman gain (1240 nm), dB/km*W> 5.8> 5
Nonconcentricity, µm< 1< 1
Other parameters are available on the request
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