TGG (Terbium Gallium Garnet)
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: TGG (Terbium Gallium Garnet)
TGG (Terbium Gallium Garnet, Tb₃Ga₅O₁₂) is a high-performance magneto-optical crystal used in the visible and near-infrared spectral ranges (400–470 nm and 500–1500 nm).
Product Introduction
TGG (Tb₃Ga₅O₁₂, terbium gallium garnet) is a high-performance magneto-optical crystal suitable for the visible and near-infrared spectral regions (400–470 nm and 500–1500 nm). It finds extensive applications in laser technology, optical communications, and optical information-processing systems. In the visible and near-infrared ranges, TGG exhibits a high Verdet constant, low transmission loss, high thermal conductivity, a high laser-induced damage threshold, and the ability to grow large-sized crystals, making it the optimal magneto-optical material for fabricating Faraday rotators and isolators in this wavelength band (400–1100 nm, excluding 470–500 nm). It is well suited for use in magneto-optical isolators, switches, modulators, and other devices. Additionally, TGG is widely employed in multi-stage amplification, ring, and seed-injection lasers based on YAG and titanium-doped sapphire.
Main advantages
- Wilder constant (40 Rad T -1 m -1 )
- Low optical loss (<0.1%/cm)
- High thermal conductivity (4 W/m -1 K -1 )
- High laser damage threshold (> 1 GW/cm²)
- Absorption coefficient (<0.1%/cm)Application Fields
- Ion-irradiated magneto-optical waveguide
-Faraday rotator
- Fiber optic isolator
- Free-space isolator
- Magneto-optical switches and magneto-optical modulatorsProduct Features
Material Properties Molecular formula Tb₃Ga₅O₁₂ Crystal structure Cubic crystal system Mode of production Lifting method Density 7.13 g/cm³ Mohs hardness 8 Mohs Unit cell parameters a=12.355 Å Transmittance range 400 nm ~ 1100 nm Verdet constant (rad/T/m) 40 @1064nm Refractive index 1.954 at 1064 nm Melting point 1725°C Product Processing Metrics Orientation [111]±15′
Extinction ratio ≥30 dB Effective Aperture >90% Maximum size <∮100mm Diameter tolerance +0/-0.05 mm Length tolerance ±0.2 mm Protective Chamfer ≤0.2×45° Surface finish 10-5 S-D Flatness ≤λ/8 at 632.8 nm Wavefront Aberration Profiling ≤λ/8 at 632.8 nm Parallelism <20" Verticality ≤15′ Edge collapse <0.1mm Coating AR: R < 0.2% @ 1064 nm -
- High magneto-optic constant (35 Rad T⁻¹m⁻¹).
- Low light loss (<0.1% / cm)
- High thermal conductivity (4 W m⁻¹K⁻¹).
- High laser damage threshold (> 1 GW/cm²).
- Absorption coefficient (<0.1%/cm) -
- Ion-Irradiated Magneto-Optic Waveguide
- Faraday Rotator
- Fiber optic isolator
- Free-space isolator
- Magneto-optic switches and magneto-optic modulators -
Material Properties Molecular formula Tb3Ga5O12 Crystal structure Cubic crystal system Production method Tiraf Method Density 7.13g/cm3 Mohs Hardness 8Mohs Unit cell parameters a = 12.355 Å Transmittance range 400 nm to 1100 nm Wiedemann constant (rad/T/m) 40 at 1064nm Refractive index 1.954 @ 1064 nm Melting point 1725°C Product Processing Metrics Directional [111] ±15′
Extinction Ratio ≥30dB Effective Aperture >90% Maximum size <∮100mm Diameter Tolerance +0 / -0.05 mm Length Tolerance ±0.2 mm Protective Chamfer ≤0.2 × 45° Surface finish 10-5 S-D Flatness ≤λ/8 @ 632.8 nm Analyzing wavefront distortion ≤λ/8 @ 632.8 nm Parallelism <20" Verticality ≤15′ Chipped edge <0.1 mm Coating AR:R < 0.2% @ 1064 nm
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