Terbium Gallium Garnet(TGG) Crystal

TGG is an excellent magneto-optical crystal used in various Faraday devices(Polarizer and Isolator) in the range of 400nm-1100nm, excluding 475-500nm.
Faraday polarizer is composed of the TGG crystal rod and a special designed magnet. The polarization of the beam through the magneto-optical materials deflexes and direction of the deflection only has some relations with the direction of magnetic field and has nothing to do with the direction of the beam propagation. Optical isolator is an optical component which allows the transmission of polarized light in only one direction.
Basic properties:
Chemical Formula Tb3Ga5O12
Lattice Parameter a=12.355Å
Growth Method Czocralski
Density 7.13g/cm3
Mohs Hardness 8.0
Melting Point 1725 ℃
Refractive Index 1.954 at 1064nm
TGG specifications HG supply:
Standard TGG Rod Specification:
Orientation [111] within ±15 arc min
Wave Front Distortion < 1/8 wave
Extinction Ratio > 30dB
Diameter +0.00mm/-0.05mm
Length +0.2mm/-0.2mm
Chamfer 0.10mm @ 45°
Flatness < 1/10 wave at 633nm
Parallelism < 30 arc Seconds
Perpendicularity < 5 arc min
Surface Quality 10/5 Scratch/Dig
AR coating <0.2%@1064nm
Damage threshold over 1 GW/cm²@1064nm