KTP single crystal

Crystal structure

Orthorhombic

Lattice parameters

A=6.404 a, b=10.616 a, c=12.814 a, Z=8

Melting point

1172°C

Curie point

936°C

Mohs hardness

5

Density

3.01g/cm³

Linear absorption coefficient

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

Deliquescence

No deliquescence

The relative dielectric constant

Eeff=13

Specific heat

0.1643 cal/g.°C

Conductivity

3.5x10^-8 s/cm (c-axis, 22°C, 1KHz)

Thermal conductivity

13W/m/K

Transmission range

350~4500nm

Absorption coefficient

< 1%/cm @1064n M and 532 N M

SHG phase matching range

0.984-3.4 M

Calorescence coefficient (/ ℃)

dnx/dT=1.1x10^-5/℃

dny/dT=1.3x10^-5/℃

dnz/dT=1.6x10^-5/℃

Nonlinear coefficient

d31=2.54pm/V, d31=4.35pm/V, d31=16.9pm/V

d24=3.64pm/V, d15=1.91pm/V at 1.064 &micro;m

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

Sellmeier equation (λ in μm)

nx²=3.0065+0.03901/(λ²-0.04251)-0.01327λ²

ny²=3.0333+0.04154/(λ²-0.04547)-0.01408λ²

nz²=3.3134+0.05694/(λ²-0.05658)-0.01682λ²

Damage threshold

> 450MW/cm², (@1064nm 10ns, 10Hz)

Directional accuracy

Δθ<0.5°, Δφ<0.5°

±0.1mm

3×3×5mm, 5×5×5mm, 5×5×15mm, 10×10×15mm, 15×15×15mm

Surface finish

10/5

>95%

<λ/8@633nm

<λ/4@633nm

<20秒

<15分

<0.2%@1064nm, <0.5%@532nm

1 year

Coating

AR/AR@1064&532nm: 

S1&S2 AR@1064&532nm, R<0.25%@1064nm, R<0.5%@532nm

HR/AR@1064&532nm:

S1 HR@1064nm&HT@532nm, R>99.8%@1064nm, R<5%@532nm

S2 AR@1064&532nm, R<0.25%@1064nm, R<0.5%@532nm