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Triple-Clad Doped Fiber

Fibercore’s triple-clad doped fibers are designed for fiber lasers and high power CATV and telecoms amplifiers. Their unique triple cladding structure is designed to encapsulate the octagonal mode mixing pump guide within a circular outer cladding, enabling lower splice losses and lower splice variability associated with fibers with octagonal outer regions. This triple cladding structure also gives an additional mode confinement structure to reduce the amount of pump light at the cladding-coating interface to aid coating reliability.

Fibercore’s triple-clad erbium/ytterbium doped fibers (TC1500Y) are designed as single-mode, high-power CATV and telecommunications amplifier fibers. The TC1500Y(6/125)HD offers a smaller Mode Field Diameter (MFD) for higher efficiency levels at output signal power around 1W. The TC1500Y(11/125)HD is designed for output signal power at 5W and above.

The TC1060Y(10/125)0.08HD is a ytterbium doped fiber designed for use in pulsed and CW fiber lasers. The composition is optimized to avoid the effects of photodarkening to ensure long lifetime and high reliability.

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)

    TC1060Y (10/125)0.08HD *TC1500Y (6/125)HDTC1500Y (11/125)HD
    Laser Core
    CompositionYtterbiumErbium and YtterbiumErbium and Ytterbium
    Operating Wavelength (nm)10601520–15701520–1570
    Numerical Aperture0.07–0.080.20–0.230.10–0.13
    Mode Field Diameter (μm)-5.6–7.2 @1550nm9.6–12 @1550nm
    Single-Mode Core Diameter (μm)10–12--
    Cut-Off Wavelength (nm)-1290–15101290–1510
    Peak Core Absorption (dB/m)-75 ± 20 @1535nm75 ± 20 @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)1.1–1.5 @915nm0.6–0.9 @915nm 2.5–4.5 @915nm
    Numerical Aperture of low index coating w.r.t. silica0.45 (Nominal)0.45 (Nominal)0.45 (Nominal)
    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
    * Passive DC variant available
    Product Variants Explained
    TC1060Y(10/125)0.08HDTriple-clad Yb doped fiber
    TC1500Y(6/125)HDTriple-clad ErYb doped fiber
    TC1500Y(11/125)HDTriple-clad ErYb doped fiber
    Operating Wavelength (nm) 1060
    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