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=7.45Å, b=7.45Å, c=6.68Å(KDP),  c=12.96Å(DKDP)

Melting point

960℃(KDP), 149℃(DKDP)

Mohs hardness

2(KDP), 2.5(DKDP)

Density

2.35g/cm³

Thermal conductivity

1.1W/(m·K)

Thermal expansion coefficient

a:6.5×10-6/K, b:8.5×10-6/K, c:1.5×10-6/K(KDP)

a:6.6×10-6/K, b:8.6×10-6/K, c:1.5×10-6/K(DKDP)

OPTICAL AND NONLINEAR OPTICAL  PROPERTIES

Transmittance

＞90%(1064nm)

Optical uniformity

＜0.1%

Temperature stability

＜10-5/K

Nonlinear optical coefficient

d36=0.39(pm/V)(KDP), d36=0.47(pm/V)(DKDP)

Thermal coefficient

dn/dT=7.5×10-6/K(KDP), dn/dT=9.3×10-6/K(DKDP)

Refractive index

no=1.4932, ne=1.4599(KDP,1064nm)

Nonlinear Coefficien(pm/v)

0.39(SHG), 0.37(THG)(KDP,1064nm)

Effective SHG coefficient (SHG, THG)

0.16(SHG), 0.08(THG)(KDP,1064nm)

Walk-off Angle  (mrad·cm)

16.6(type I), 28.5(type  II)(KDP,1064nm)

Acceptance Angle (mrad·cm)

11.3(type I), 19.2(type  II)(KDP,1064nm)

Phase Matching Range (℃m)

275~1200(SHG),  500~2500(THG)(KDP,1064nm)

Temperature Acceptance (℃)

65(KDP,1064nm), 70(DKDP,1064nm)

Damage Threshold(GW/cm2)

~2(SHG), ~0.5(THG)