SPECIFICATIONS

Dimensional  Tolerance

(W±0.1 mm)×(H±0.1 mm)×(L±0.2 mm)

Angle  Tolerance

Dq＜±0.3°, Df＜±0.3°

Parallelism

＜20″

Perpendicularity

＜5′

Clear  Aperture

≥Central 95% of the diameter

Surface  Quality

10/5(MIL-PRF-13830B)

Flatness

λ/8 @633nm

Wavefront  Distortion

＜λ/8 @633nm

CHEMICAL  AND STRUCTURAL PROPERTIES

Crystal  structure

Orthorhombic

Lattice  parameters

a=12.532Å, b=6.71Å, c=10.864Å

Melting  point

1090℃

Mohs  hardness

4.5

Density

3.85g/cm³

Thermal  conductivity

10W/(m·K)

Thermal  expansion coefficient

a:4.4×10^-6/K, b:3.5×10^-6/K, c:9.3×10^-6/K

OPTICAL  AND NONLINEAR OPTICAL PROPERTIES

Transmittance

＞95%(1064nm)

Optical  uniformity

＜0.1%

Temperature  stability

＜10-5/K

Nonlinear  optical coefficient

d31=8.8, d32=3.5, d33=13.8

Thermal  coefficient

dn/dT=10^-5/K

Refractive  index

no=2.155,  ne=2.220(1064nm)

Nonlinear  Coefficien(pm/v)

3.5(SHG),  1.8(THG)

Effective  SHG coefficient (SHG, THG)

1.7(SHG),  0.9(THG)

Walk-off  Angle  (mrad·cm)

32(type  I), 42(type II)

Acceptance  Angle (mrad·cm)

22.5(type  I), 29.5(type II)

Phase  Matching Range (℃m)

400~1300(SHG),  900~2600(THG)

Temperature  Acceptance (℃)

55

Damage  Threshold(GW/cm²)

~2.5(SHG), ~0.6(THG)