SPECIFICATIONS

Dimension Tolerance

(W ± 0.1mm)×(H ± 0.1mm)×(L ± 0.2mm/0.1mm)

Angle  Tolerance

∆θ< ± 0.25°; ∆φ< ±0.25°

Parallelism

10 ″

Perpendicularity

5 ′

Clear Aperture

Central  95% of the diameter

Surface Quality (Scratch/Dig)

10/5（MIL-PRF-13830B）

Flatness

λ/10 @ 633nm

Transmitted Wavefront Distortion

λ/10@ 633nm

Anti-Reflection  Coating

According  to customer requirements

CHEMICAL  AND STRUCTURAL PROPERTIES

Crystal Structure

Orthorhombic,  Space group Pna21, Point group mm2

Lattice Parameter

a=8.4473Å,b=7.3788Å,c=5.1395Å,Z=2

Melting Point

About  834℃

Mohs Hardness

6

Density

2.47g/cm3

Thermal Conductivity

3.5W/mK

Thermal Expansion Coefficients

αx=10.8×10^-5/K,  αy=-8.8×10^-5/K,αz=3.4×10^-5/K

OPTICAL  AND NONLINEAR OPTICAL PROPERTIES

Transparency Range

169nm~2600 nm

SHG Phase Matchable Range

551~2600nm (Type I);790-2150nm (Type II)

Therm-optic Coefficient ( λ in μm)

dnx/dT=-9.3×10^-6

dny/dT=-13.6×10^-6

dnz/dT=(-6.3-2.1λ)×10^-6

Absorption Coefficients

<0.1%/cm  at 1064nm;<0.3%/cm at 532nm

Angular Acceptance:

52  mrad·cm

Walk-off Angle

0°

NLO Coefficients

d_eff（I）=d₃₂cosΦ（Type I   in XY plane）

d_eff（I）=d₃₁cos2θ+d₃₂sin2θ（Type I   in XZ plane）

d_eff（II）=d₃₁cosθ（Type  II in YZ plane）

d_eff（II）=d₃₁cos2θ+d₃₂sin2θ（Type  II in XZ plane）

Non-vanished NLO Susceptibilities

d₃₁=1.05 ± 0.09 pm/V

d₃₂=-0.98 ± 0.09 pm/V

d₃₃=  0.05 ± 0.006 pm/V

Sellmeier Equations (λ in μm)

nx2=2.454140+0.011249/(λ2-0.011350)-0.014591λ2-6.60×10-5λ4

ny2=2.539070+0.012711/(λ2-0.012523)-0.018540λ2+2.0×10-4λ4

nz2=2.586179+0.013099/(λ2-0.011893)-0.017968λ2-2.26×10-4λ4