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CRYLIGHT 社製 Birefringent Crystals
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各モデルの抜粋仕様を下記から確認いただけます。
Calcite CrystalsYVO4 CrystalsAlpha-BBO Crystals
Calcite Crystals
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Features
Calcite is a negative uniaxial crystal that has high birefringence, wide spectral transmission and availability in reasonably sized rhombs. Although is a fairly soft crystal and is easily scratched, it is ideal material used as visible and near IR polarizers, such as Glan Taylor, Glan Thompson and Glan laser.
Specifications: Orientation: | < 111 > +/-5deg |
Diameter Tolerance : | +0.0 /-0.1mm |
Thickness Tolerance: | +/-0.2mm |
Surface Quality: | better than 10/5 scratch/dig |
Parallelism: | < 30 arcsec |
Flatness: | < λ/8 @632.8nm |
Perpendicularity: | < 5 arcmin |
Wavefront Distortion: | < λ/2 @632.8nm |
Coating: | Coating upon Request |
Properties:
Crystal Structure | Cubic |
Density | 4.5 g/cm3 |
Transmission Range | 250 – 5000 nm |
Melting Point | 1970 °C |
Specific Heat | 0.59 W·s /g /K |
Thermal Conductivity | 14 W/m /K |
Thermal Shock Resistance | 790 W /m |
Thermal Expansion | 6.9×10-6 /K |
dn/dT, @ 633nm | 7.3×10-6 /K-1 |
Mohs Hardness | ~ 8.5 |
Refractive Index | 1.8245 @ 0.8mm, 1.8197 @ 1.0mm, |
1.8121 @ 1.4mm |
YVO4 Crystals
Features
The yttrium orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. It has good mechanical and physical properties and is ideal for optical polarizing components because of its wide transparency range and large birefringence. It is an excellent synthetic substitute for Calcite (CaCO3) and Rutile (TiO2) crystals in many applications including fiber optic isolators and circulators, beam displacers, Glan polarizers and other polarizing optics, etc.
Specifications: Diameter: | Max 25m |
Length: | Max 35mm |
Surface Quality: | better than 20/10 scratch/dig |
Beam Deviation: | < 3 arc min |
Optical Axis Orientation: | +/-0.2deg |
Flatness: | < λ/4 @632.8nm |
Wavefront Distortion: | < λ/2 @632.8nm |
Coating: | Coating upon Request |
Properties:
Transmitting range | 400~5000nm |
Crystal Symmetry | Zircon tetragonal, space group D4h |
Crystal Cell | a=b=7.12 °, c=6.29 ° |
Density | 4.22 g/cm2 |
Hygroscopic Susceptibility | Non-hygroscopic |
Mohs Hardness | 5 glass like |
Thermal Optical Coefficient | △na /dT=8.5×10-6 /K; dnc /dT=3.0×10-6 /K |
Thermal Conductivity Coefficient | ||C: 5.23 w/m/k; ⊥C:5.10w/m/k |
Crystal Class | Positive uniaxial with no=na=nb, ne=nc |
Refractive Indices, | no=1.9929, ne=2.2154, △n=0.2225, ρ=6.04°, at 630nm |
Birefringence( Dn=ne-no) | no=1.9500, ne=2.1554, △n=0.2054, ρ=5.72°, at 1300nm |
and Walk-Off Angle at 45 deg(ρ) | no=1.9447, ne=2.1486, △n=0.2039, ρ=5.69°, at 1550nm |
Sellmeier Equation ( l in mm) | no2 =3.77834+0.069736/(λ2-0.04724)-0.0108133λ2 ne2 =4.5905+0.110534/(λ2-0.04813)-0.0122676λ2 |
Alpha-BBO Crystals
Features
High Temperature form BBO (a-BaB2O4) is a negative uniaxial crystal. It has large birefringence over the broad transparent range from 189 nm to 3500 nm. Recently, CryLight has succeeded in growing this crystal into large size. The physical, chemical, thermal and optical properties of a-BBO crystal are similar to those of b-BBO. However, the nonlinear optical properties of a-BBO crystal is vanished due to the centric symmetry with its crystal structure. It is not recommended to use for NLO processes.
Specifications: Diameter: | Max 50m |
Length: | Max 35mm |
Surface Quality: | better than 20/10 scratch/dig |
Beam Deviation: | < 3 arc min |
Optical Axis Orientation: | +/-0.2deg |
Flatness: | < λ/4 @632.8nm |
Wavefront Distortion: | < λ/2 @632.8nm |
Coating: | Coating upon Request |
Properties:
Transmitting range | 189nm~3500nm |
Density | 3.85g/cm3 |
Therm-Optic Coefficients | dno/dT=-9.3 x 10-6/ °C dno/dT=-16.6×10-6/ °C |
Optical Homogeneity | △n»10-6/cm |
Mohs Hardness | 4.5 |
Damage Threshold | 1GW/cm2 at 1064nm 500MW/cm2 at 532nm |
Hygroscopic Susceptibility | Low |
Thermal Expansion Coefficients | aa=4×10-6 |
(25 °C – 900 °C) | aa=4×10-6 |
Linear Absorption Coefficients | a<0.005cm-1 from 300nm to 2300nm |
Refractive Indices, Birefringence(Dn=ne-no) and wal-off Angle at 45 °C(r) | ne=1.58462,no=1.65790,△n=-0.073282;r=-4.9532° at 1064nm ne=1.60206,no=1.67755,△n=-0.075491;r=-5.0407° at 532nm ne=1.67190,no=1.76171,△n=-0.089805;r=-5.6926° at 266nm |
Sellmeier equation(l in mm) | no2=2.7471+0.01878/(λ2-0.01822)-0.01354λ2 ne2=2.3174+0.01224/(λ2-0.01667)-0.01516λ2 |