TSAG (Terbium-Scandium-Aluminum Garnet) Crystal
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: TSAG (Terbium-Scandium-Aluminum Garnet) Crystal
TSAG (Terbium-Scandium-Aluminum Garnet) Crystals, also known as TSAG crystals, with the chemical formula Tb₃Sc₂Al₃O₁₂, are an ideal magneto-optic material for both visible and infrared light applications.
Product Introduction
TSAG (Terbium-Scandium-Aluminum Garnet) Crystals, also known as TSAG crystals, with the chemical formula Tb₃Sc₂Al₃O₁₂, are an ideal magneto-optic material for both visible and infrared light applications. Featuring a high Verdet constant along with outstanding thermal and mechanical properties, TSAG crystals find extensive use in fields such as Faraday rotators, optical isolators, and imaging technologies.
The TSAG Faraday crystal is an ideal magneto-optic material for the 400–1600 nm wavelength range—encompassing both the visible and infrared bands. Featuring high birefringence, excellent thermal stability, and superior mechanical properties, TSAG is an essential crystal for next-generation high-power lasers. Compared to TGG, TSAG boasts a Verdet constant that is 20% higher at 1064 nm, along with 30% lower absorption—a key advantage that makes it the perfect choice for compact magneto-optic devices. Additionally, TSAG outperforms TGG with a significantly higher Faraday rotation constant and reduced absorption losses, enabling the design of more compact isolators while maintaining exceptional performance even at high power levels. As a result, TSAG is the ideal material for optical isolators in high-power applications.
Recently, the optical and scintillation properties of TSAG (Tb₃Sc₂Al₃O₁₂) crystals were studied, demonstrating their potential for use as scintillators.
Key Advantages
- Miniaturization of isolators
- Low thermal birefringence
- The ideal choice for compact magneto-optic devices
- Low-Temperature Birefringence
- Absorption (<2500 ppm/cm at 1064 nm)
- High magneto-optic constant (48 Rad T) -1 m -1 @1064 nm), which is 20-30% larger than TGG crystals
- Low transmission loss (<3000 ppm/cm at 1064 nm), 30% lower than that of TGG crystals
- Approximately 30% lower than TGG, with high-power compatibilityApplication Areas
- Faraday isolator
- Scintillation characteristics of TSAG crystal for imaging applications
- Faraday rotator
- Optical isolatorProduct Features
Material Properties
Chemical Formula
Tb₃Sc₂Al₃O₁₂
Crystal Structure
Cubic, Space Group Ia3d
a=12.3 Å
Density
5.91 g/cm³
Transparency Range
400-1600 nm (uncoated)
Growth Method
Melting Point
1970°C±10°C
Product Processing Indicators
Targeting Accuracy
±15′
Extinction Ratio
≥30 dB
Effective Aperture
>90%
Diameter Tolerance
+0/-0.05 mm
Length Tolerance
±0.2 mm
Chamfer
≤0.2×45°
Surface Quality
10-5 S-D
Flatness
≤λ/8@632.8 nm
Wavefront Distortion
≤λ/8@632.8 nm
Parallelism
<20"
Perpendicularity
≤15′
Chipped Edge
<0.1 mm
Coating
AR:R <0.2% @ 1064 nm (customizable coating system)
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- 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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