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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, µm 5.0 ± 0.5 5.0 ± 1
Clad diameter, µm 125 ± 1 125 ± 1
Core NA 0.17 ± 0.02 0.17 ± 0.02
Cutoff wavelength, µm 0.9 ± 0.2 0.9 ± 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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