LTF (Lithium Terbium Fluoride) Crystal
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: LTF (Lithium Terbium Fluoride) Crystal
LTF (Lithium Terbium Fluoride) Crystals, with chemical formula LiTbF₄, are excellent magneto-optic materials characterized by a large Verdet constant and a low absorption coefficient.
Product Introduction
LTF (Lithium Terbium Fluoride) Crystals, with chemical formula LiTbF₄, are excellent magneto-optic materials characterized by a large Verdet constant and a low absorption coefficient. These properties make LTF an ideal choice for use in magneto-optic devices within high-power, high-energy laser systems. Compared to oxide magneto-optic crystals like TGG and TSAG, LTF exhibits an absorption coefficient that is one order of magnitude lower, along with a negative thermo-optic coefficient and a nonlinear susceptibility significantly lower than that of TGG—making it exceptionally well-suited for high-power magneto-optic applications.
Key Advantages
- The thermo-optic coefficient is negative.
- Wild constant large numbers
- Low absorption coefficient
- Low nonlinear coefficientApplication Areas
- High-power optical isolator
Product Features
Material Properties
Transparency Range
400~1500 nm
Verdet Constant
38 rad/T·m
Refractive Index
no=1.4679, ne=1.4962
Density
5.46 g/cm³
Absorption
~ 0.02 %/cm @1064nm
Nonlinear Refractive Index
~ 1×10-19 m²/W
Product Processing Indicators
Effective Aperture
>90%
Diameter Tolerance
+0/-0.05 mm
Length Tolerance
±0.1 mm
Chamfer
≤0.2×45°
Surface Quality
10-5 S-D
Flatness
≤λ/6@632.8 nm
Wavefront Distortion
≤λ/6@632.8 nm
Parallelism
<20"
Perpendicularity
≤15′
Chipped Edge
<0.1 mm
Coating
Customized to Customer Specifications
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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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