TGG single crystal, with large Verdet constant, low optical loss, high thermal conductivity and laser-damaged threshold, is widely applied in YAG, Ti doped sapphire lasers. TGG single crystal (Terbium Gallium Garne) is an excellent magneto-optical material used in various Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm. (excluding 470 - 500nm) Therefore, it is widely used in measuring devices, lasers and optical fiber system.