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Highly Germanium Doped Fiber

Intrinsically photosensitive fiber for grating fabrication in distributed strain and temperature sensors

  • More than 5X Germania level of standard telecommunications fibers
  • Suitable for inscription of long arrays with or without hydrogen loading
  • High temperature polyimide coating variants available for harsh environment applications (see Polyimide Coated SM Fiber)

Typical Applications:

  • Temperature sensors
  • Strain sensors
  • Biomedical sensors
  • Hydrophones
  • Geophones
  • Fiber Bragg Gratings (FBGs)

Comparison
Model SM1500(4.2/50) SM1500(4.2/80) SM1500(4.2/125)
Operating Wavelength (nm) 1520 - 1650 1520 - 1650 1520 - 1650
Cut-Off Wavelength (nm) 1350 - 1500 1350 - 1500 1350 - 1500
Numerical Aperture 0.29 - 0.31 0.29 - 0.31 0.29 - 0.31
Mode Field Diameter (μm) 4.0 - 4.5 @1550nm 4.0 - 4.5 @1550nm 4.0 - 4.5 @1550nm
Attenuation (dB/km) ≤2.0 @1550nm ≤1.5 @1550nm ≤1.5 @1550nm
Proof Test (%) 1, 2 or 3 (100, 200 or 300 kpsi) 1, 2 or 3 (100, 200 or 300 kpsi) 1, 2 or 3 (100, 200 or 300 kpsi)
Cladding Diameter (μm) 50 ± 1 80 ± 1 125 ± 1
Core Cladding Concentricity (μm) ≤0.5 ≤0.5 ≤0.5
Coating Diameter (μm) 110 ± 6 170 ± 5 245 ± 7
Coating Type Single Acrylate Dual Acrylate (Single by Special Order) Dual Acrylate (Single by Special Order)
Operating Temperature (°C) -55 to +85 -55 to +85 -55 to +85
Product Variants Explained
SM1500(4.2/50)

Reduced cladding highly photosensitive fiber for FBGs in embedded sensors and very tightly coiled applications

SM1500(4.2/80)

Reduced cladding highly photosensitive fiber for FBGs in embedded sensors and coiled applications

SM1500(4.2/125)

Highly photosensitive and bend insensitive fiber for FBGs around 1550nm

Operating Wavelength (nm) 1520 - 1650
Cut-Off Wavelength (nm) 1350 - 1500
Numerical Aperture 0.29 - 0.31
Mode Field Diameter (μm) 4.0 - 4.5 @1550nm
Attenuation (dB/km) ≤2.0 @1550nm
Proof Test (%) 1, 2 or 3 (100, 200 or 300 kpsi)
Cladding Diameter (μm) 50 ± 1
Core Cladding Concentricity (μm) ≤0.5
Coating Diameter (μm) 110 ± 6
Coating Type Single Acrylate
Operating Temperature (°C) -55 to +85