SPECIFICATIONS

Dimension Tolerance

(W±0.1mm)×(H±0.1mm)×(L±0.2mm/0.1mm)

Angle Tolerance

Δθ＜±0.2°；Δφ＜±0.2°

Parallelism

＜30"

Perpendicularity

＜10′

Clear Aperture

≥Central 90% of the diameter

Surface Quality (Scratch/Dig)

20/10 (MIL-PRF-13830B)

Flatness

<λ/8@633nm

Transmitted Wavefront Distortion

＜λ/8@633nm

Anti-Reflection Coating

According to customer requirements

CHEMICAL AND STRUCTURAL  PROPERTIES

Crystal Structure

Orthorhombic, Space group Pna21, Point group mm2

Lattice Parameter

a=12.81Å, b=6.404Å, c=10.616Å

Melting Point

About 1172℃

Mohs Hardness

5

Density

3.01g/cm3

Thermal Conductivity

13W/mK

Thermal Expansion Coefficients

ax=11×10^-6/℃, ay=9×10^-6/0C,  az=0.6×10^-6/℃

OPTICAL AND NONLINEAR OPTICAL  PROPERTIES

Transparency Range

350~4500nm

SHG Phase Matchable Range

497~1800nm  (Type II)

Therm-optic Coefficient ( λ in μm)

dnx/dT=1.1×10^-5

dny/dT=1.3×10^-5

dnz/dT=1.6×10^-5

Absorption Coefficients

<0.1%/cm at  1064nm    <1%/cm at 532nm

For Type II SHG of a Nd:YAG laser at  1064nm

Temperature Acceptance: 24℃·cm

Spectral Acceptance: 0.56nm·cm

Angular Acceptance: 14.2mrad·cm  (φ);  55.3mrad·cm(θ)

Walk-off Angle: 0.55°

NLO Coefficients

deff(II)≈(d₂₄- d₁₅)sin2φsin2θ;-  (d₁₅sin²φ+ d₂₄cos²φ)sinθ

Non-vanished NLO Susceptibilities

d₃₁=6.5 pm/V  d₂₄=7.6  pm/V

d₃₂= 5pm/V  d₁₅=6.1  pm/V

d₃₃=13.7 pm/V

Sellmeier Equations (λ in μm)

n_x²=3.0065+0.03901/(l 2-0.04251)-0.01327λ²

n_y²=3.0333+0.04154/(l 2-0.04547)-0.01408λ²

n_z²=3.3134+0.05694/(l 2-0.05658)-0.01682λ²