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TGG crystal

Terbium gallium garnet (Tb3Ga5O12, TGG) crystals have large magneto-optical constants, low optical losses, high thermal conductivity, and high laser damage thresholds, and are widely used in multi-level amplification, ring, and seed injection lasers such as YAG and Ti doped sapphire. TGG single crystal is the optimal magneto-optical material for making Faraday rotators and isolators, with suitable wavelengths ranging from 400 to 1100nm (excluding 470 to 500nm)



Physicochemical properties

Chemical formula Tb3Ga5O12
The crystal structure Cubic crystal system
The lattice constant 12.355 A
Melting point 1725 ℃
Density, g/cm3 7.13
Mohs hardness 8.0
Verdet Constant 35 rad
Transmission loss < 0.1% / cm
Thermal conductivity 7.4W·m-1·K-1
Laser damage threshold > 1 GW/cm2
The refractive index 1.954 (1064 nm)



Directional <111>
Dimensioin tolerance Dia±0.1mm; L±0.2mm
Flatness < λ/10
Parallelism ≤ 30″
Vertical degree ≤ 5 ′
Surface finish 10/5
Optical quality Extinction ratio: 30dB
Coating system ≤ 0.2%@1064nm

* Blanks or chips with the required crystal size and specifications of terbium gallium garnet (Tb3Ga5O12, TGG) can be provided upon special requirements.