Terbium Gallium Garnet (TGG) Crystal
TGG is an excellent magneto-optical crystal used in various Faraday devices (Rotator and Isolator) in the range of 400nm-1100nm, excluding 475-500nm.It has large magneto-optical constant, low light loss, high thermal conductivity and high laser damage threshold. It is widely used in multi-stage amplification, ring type and seed injection lasers such as YAG and Ti-doped sapphire.
Main Advantages
• Large Verdet constant (35 Rad T-1m-1)
• Low optical losses (<0.1%/cm)
•High thermal conductivity (7.4W m-1K-1)
•High laser damage threshold (>1GW/cm2)
Basic properties of TGG crystals
| Physicochemical properties | |
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Chemical formula
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Tb3Ga5O12
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The crystal structure
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Cubic crystal system
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The lattice constant
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12.355A
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Melting point
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1725 ℃
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Density, g/cm3
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7.13 |
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Mohs hardness
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8.0 |
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Magneto optical constants
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35Rad
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Transmission loss
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<0.1%/cm
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Thermal conductivity
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7.4W•m-1•K-1
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Laser damage threshold
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> 1GW/cm2
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The refractive index
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1.954(1064nm)
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