TGG is an excellent magneto-optical crystal used in various Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm, excluding 475-500nm. Advantages of TGG: Large Verdet constant (35 Rad T-1 m-1) Low optical losses (<0.1%/cm) High thermal conductivity (7.4W m-1 K-1). High laser damage threshold (>1GW/cm2)