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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
    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
    Technical Bulletins