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TGG (Terbium Gallium Garnet) Crystals and Substrates
Large Verdet constant and low optical loss
  • High thermal conduction and laser-damaged threshold
  • Excellent for Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm
  • Clean package: class 1000 clean room and class 100 bags
  • Typical orientation of TGG substrates: <111>
  • Applications: Faraday devices, lasers, and optical fiber system
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    Specifications:

    Material TGG(Terbium Gallium Garne) single crystal Orientations <111>±5 °
    Wavefront Distortion <λ/8 wave total @633nm Extinction Ratio A:>30dB,B:>28dB
    Diameter Tolerance ±0.1mm Length Tolerance ±0.05mm
    Chamfer 0.2mm @ 45° Flatness <λ/10 wave at 633nm
    Parallelism <1 arc minutes Perpendicularity <5 arc minutes
    Surface Quality 10/5 S/D per MIL-O13830A

     

    Basic Properties:

    Chemical Formula Tb3Ga5O12 Crystal Structure Cubic
    Lattice Constant a=12.355Å Growth Method Czochraiski
    Density(g/cm3) 7.13 Hardness(mohs) 8.0
    Melting Point(℃) 1725℃ Refractive Index 1.954 @1064nm
    Thermal Conductivity 9.4×10-6 /K Verdet Constant 0.12min/Oe.cm at 1064nm

    Terbium Gallium Garnet (TGG) single crystal, with large Verdet constant, low optical loss, high thermal conduction, and laser-damaged threshold, has become an excellent magneto-optical material used to manufacture Faraday devices (Rotator and Isolator) operating in the range of 400nm-1100nm (excluding 470 - 500nm), which finds widespread utilities YAG, Ti-doped sapphire, multi-stage amplification, Annular, seed injected lasers. North Optics provides customized and stocked TGG substrates for magnetic and ferroelectricity film growth.