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Triple-Clad Doped Fiber

Fibercore’s triple-clad fibers are designed for fiber lasers, LiDAR systems and high power CATV / telecoms amplifiers.

The unique triple cladding structure is designed to encapsulate the octagonal mode mixing pump guide within a circular outer cladding, enabling lower splice losses and higher splice repeatability. The design also provides additional pump mode confinement to reduce the amount of pump light at the cladding-coating interface to improve long term reliability. The triple clad structure is retro-fit compatible with standard double clad fibers found in pump combiners and other cladding pumped components.

These fibers are designed for different applications, TC1500Y(6/125)HD is suitable for applications up to 1W signal power, TC1500YLP(11/125)HD designed for < 4W signal power and optimized for pulsed applications, TC1500Y(11/125)HD is designed for use at ≥ 5W signal power.

Typical Applications:

  • High Power Erbium Doped Fiber Amplifiers (EDFAs)
  • Ytterbium/Erbium Doped Fiber Amplifier (YEDFA)
  • Fiber Lasers
  • Light Detection and Ranging (LIDAR)
  • Cable Television (CATV)
    Comparison
    TC1500Y (6/125)HDTC1500YLP (11/125)HDTC1500Y (11/125)HD
    Laser Core
    CompositionErbium and YtterbiumErbium and YtterbiumErbium and Ytterbium
    Operating Wavelength (nm)1520–15701520–15701520–1570
    Numerical Aperture0.20–0.230.10–0.130.10–0.13
    Mode Field Diameter (μm)5.6–7.2 @1550nm5.6–7.2 @1550nm9.6–12 @1550nm
    Single-Mode Core Diameter (μm)4.3-5.87.6-11.67.6-11.6
    Cut-Off Wavelength (nm)1290–15101290–15101290–1510
    Peak Core Absorption (dB/m)70 (nominal) @1535nm50 (nominal) @1535nm80 (nominal) @1535nm
    Pump Guide
    CompositionPure silica with F-doped silica claddingPure silica with F-doped silica claddingPure silica with F-doped silica cladding
    Mean Core Diameter (μm)105–115105–115105–115
    Absorption (dB/m)0.6–0.9 @915nm2.5–4.5 @915nm2.5–4.5 @915nm
    Numerical Aperture of low index coating w.r.t. silica0.45 (Nominal)0.45 (Nominal)0.45 (Nominal)
    General
    Proof Test Level (%)1 (100 kpsi)1 (100 kpsi)1 (100 kpsi)
    Coating TypeLow index acrylateLow index acrylateLow index acrylate
    Cladding Diameter (μm)125 ± 1125 ± 1125 ± 1
    Coating Diameter (μm)245 ± 15245 ± 15245 ± 15
    Product Variants Explained
    TC1500Y(6/125)HDTriple-clad ErYb doped fiber
    TC1500YLP(11/125)HDTriple-clad ErYb doped fiber
    TC1500Y(11/125)HDTriple-clad ErYb doped fiber
    Operating Wavelength (nm) 1520–1570
    Cut-Off Wavelength (nm) 1290–1510
    Numerical Aperture 0.10–0.13
    Mode Field Diameter (μm) 9.6–12 @1550nm
    Proof Test (%) 1 (100 kpsi)
    Cladding Diameter (μm) 125 ± 1
    Coating Diameter (μm) 245 ± 15
    Coating Type Low index acrylate
    Absorption (dB/m) 2.5–4.5 @915nm
    Composition Ytterbium
    Numerical Aperture 0.07 - 0.08
    Mode Field Diameter (μm) -
    Single-Mode Core Diameter (μm) 10 - 12
    Cut-Off Wavelength (nm) -
    Peak Core Absorption (dB/m) -
    Composition Pure silica with F-doped silica cladding
    Mean Core Diameter (μm) 105 - 115
    Absorption (dB/m) 1.1 - 1.5 @915nm
    Numerical Aperture of Low Index Coating W.R.T. Silica 0.45 (Nominal)
    Proof Test (%) 1 (100 kpsi)
    Coating Type Low index acrylate
    Cladding Diameter (μm) 125 ± 1
    Coating Diameter (μm) 245 ± 15
    Technical Bulletins