TGG is a Faraday rotator crystal with a high Verdet constant, used mainly in optical isolators.

Material Parameters
Host crystal Tb3Ga5O12
Lattice type garnet, cubic
Crystallographic orientation [111] – other orientations on request
Verdet constant -40 rat T-1 m-1 @ 1064 nm
-134 rad T-1 m-1 @ 632 nm
Index of refraction 1,95 @ 1062 nm


  • rods with length up to 70 mm, diameter 1 to 10 mm (standard specifications)
  • extinction ratio >40 db available
  • optical transmission depends on the required wavelength range, material with <0.002cm-1 is available
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  • Coatings upon request