TGG crystal

August 26, 2022

TGG is the best magneto-optic material for making Faraday rotators and isolators, and its applicable wavelength is 400-1100nm (excluding 470nm-500nm).

And its main advantage is：

1：Large magneto-optic constant (35 Rad T-1m-1).

2：Low transmission loss (<0.1%/cm).

3：High thermal conductivity (7.4W m-1K-1).

4：High resistance to laser damage threshold (>1GW/cm2).

Main application:Faraday rotators, optical isolators, etc.

Main 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

Quanzhou Huake can provide the processing index of TGG crystal:

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%




















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