P-SM - Phosphorus doped fiber

FORC-Photonics

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P-SM

Count

  • Core diameter
  • 5 µm
  • Clad diameter
  • 125 µm
  • Nonconcentricity
  •  < 1 µm
  • Core NA 
  • ~ 0.18 
  • Cut-off wavelength
  •  ~ 1 µm
  • Description
  • Features

 P-SM-5, P-SM-7, P-SM-8 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.

Fiber specifications

Model  P-SM-5 P-SM-7  P-SM-8
Core diameter, µm  5.0 ± 0.5  5.0 ± 0.6 5.5 ± 0.5 
Clad diameter, µm  125 ± 1  125 ± 1  125 ± 1 
Core NA  0.18  0.18  0.18 
MFD @ 1550nm, µm   4.0 ± 0.5  4.0 ± 0.5  4.0 ± 0.5 
Cutoff wavelength, µm  0,95 ÷ 1,05  0,9 ÷ 1,25  0,9 ÷ 1,25 
Optical loss (1064 nm), dB/km  < 2.0  < 2.9  < 2.1 
Optical loss (1240 nm), dB/km  < 1.2  < 1.95  < 1.1 
Optical loss (1480 nm), dB/km  < 1.0  < 1.45  < 1.0 
Raman gain, dB/km×W  > 5.8  > 6  < 5 
Nonconcentricity, µm  < 1  < 1  < 1 

Other parameters including PM version are available on the request

JSC «Leningrad Laser Systems» (LLS) is the official distributor of FORC-Photonics and offers full technical support and worldwide shipping of products.

Features
  • Parameter
    Value
  • Core diameter
    5 µm
  • Clad diameter
    125 µm
  • Nonconcentricity
     < 1 µm
  • Core NA 
    ~ 0.18 
  • Cut-off wavelength
     ~ 1 µm
  • Raman gain
     > 6 dB/km×W