Laser Crystal Birefringent Crystal YVO4

Birefringent Crystals

Birefringent crystals are anisotropic materials and can split a single incident light ray into two, each of which travels at a different speed and polarization. In the context of lasers, birefringent crystals are often used as components in laser systems to manipulate the polarization of the laser beam. By adjusting the crystal orientation and the incident angle of the laser beam, the birefringent crystal can be used to selectively attenuate one polarization state of the laser beam, resulting in a polarized output.

Part NumberBLC-YVO4Part NumberBLC-BBO(A)
Transparency RangeHigh transmittance from 0.4 to 5μmTransparency Range190 – 3500nm
Crystal SymmetryZircon Tetragonal, space group D4hDensity3.85g/cm3
Crystal Cella = b = 7.12A°; c = 6.29A°Hygroscopic SusceptibilityLow
Density4.22g/cm3Hardness (Mohs)4.5
Mohs Hardness5, glass-likeThermal Expansion Coefficients (/°C)-9.3 x 10-6 (C)
-9.5 x 10-6 (A)
Hygroscopic SusceptibilityNon-hygroscopicDamage Threshold1GW
Thermal Expansion Coefficientαa = 4.43 x 10-6/K; αc = 11.37 x 10-6/KRefractive Indices
no = 1.6776, ne = 1.5534, 532nm
no = 1.6579, ne = 1.5379, 1064nm
Thermal Conductivity Coefficient//C: 5.23 W/m/K; ⟘C: 5.10 W/m/KSellmeier Equation (λ in μm)
no2 = 2.7471 + 0.01878/(λ2 – 0.01822) – 0.01354λ2
ne2 = 2.37153 + 0.01224/(λ2 – 0.01667) – 0.01516λ2
Crystal ClassPositive uniaxial with no = na = nb, ne = nc
 
Thermal Optical Coefficientdna/dT = 8.5 x 10-6/K; dnc/dT = 3.0 x 10-6/K
Refractive Indices, Birefringence (Δn = ne – no) and Walk-off Angle at 45° (ρ)no = 1.9929, ne = 2.2154, Δn = 0.2225, ρ = 6.04° at 630nm
no = 1.9500, ne = 2.1554, Δn = 0.2054, ρ = 5.72° at 1300nm
no = 1.9447, ne = 2.1486, Δn = 0.2039, ρ = 5.69° at 1550nm
Sellmeier Equation (λ in μm)no2 = 3.77834 + 0.069736/(λ2 – 0.04724) – 0.0108133λ2
ne2 = 4.59905 + 0.110534/(λ2 – 0.04813) – 0.0122676λ2

 

  YVO4TiO2CaCO3LiNbO3
Thermal Expansion (/°C)c-axis11.4 x 10-69.2 x 10-626.3 x 10-616.7 x 10-6
 a-axis4.4 x 10-67.1 x 10-65.4 x 10-67 x 10-6
Refractive Indexno1.9447 @ 1550nm2.454 @ 1530nm1.6346 @ 1497nm2.2151@ 1440nm
 ne2.1486 @ 1550nm2.710 @ 1530nm1.4744 @ 1497nm2.1413 @ 1440nm
Birefringence (ne-no) 0.2039 @ 1550nm0.256 @ 1530nm-0.1572 @ 1497nm-0.0738 @ 1440nm
Mohs Hardness 56.535
Deliquescence NoneNoneWeakNone
Transparency Range 0.4 – 5μm0.4 – 5μm0.35 – 2.3μm0.4 – 5μm



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