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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
SM1500 (4.2/50)SM1500 (4.2/80)SM1500 (4.2/125)
Operating Wavelength (nm)1520-16501520-16501520-1650
Cut-Off Wavelength (nm)1350-15001350-15001350-1500
Numerical Aperture0.29-0.310.29-0.310.29-0.31
Mode Field Diameter (μm)4.0-4.5 @1550nm4.0-4.5 @1550nm4.0-4.5 @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 ± 180 ± 1125 ± 1
Core Cladding Concentricity (μm)≤0.5≤0.5≤0.5
Coating Diameter (μm)110 ± 6170 ± 5245 ± 7
Coating TypeSingle AcrylateDual Acrylate (Single by Special Order)Dual Acrylate (Single by Special Order)
Operating Temperature (ºC)-55 to +85-55 to +85-55 to +85