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Potassium Titanyl Phosphate ( KTiOPO4, KTP )

 

Potassium Titanyl Phosphate KTiOPO4, KTP, SurfaceNet GmbH Germany

Potassium Titanyl Phosphate KTiOPO4, KTP

Potassium Titanyl Phosphate KTiOPO4, KTP

Structural and Physical Properties

Crystal Structure

Orthorhombic, space group Pna21, point group mm

Cell parameters

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

Melting Point

1172 C incongruent

Curie Point

936 C

Mohs hardness

≈ 5

Density

3.01 g / cm

Color

Colorless

Hygroscopic susceptibility

No

Specific heat

0.1643 cal / g C

Thermal conductivity

0.13 W / cm / K

Electrical conductivity

3.5 x 10-8 s/cm (c-axis, 22C, 1 KHz)

Nonlinear Optical Properties

Phase matchable SHG range

497 1800 nm

Nonlinear optical coefficients

d31 = 6.5 pm / v
d
32 = 5 pm / v
d
33 = 13.7 pm / v
d
24 = 7.6 pm / v
d
15 = 6.1 pm / v
d
eff(І?І?) ≈(d24 d15) sin2fsin2q - (d15sinf + d24cosf) sinq

For type II SHG of a Nd: YAG

Laser at 1064 nm

Pm angle: q = 90C, f = 23.3
Effective SHG coefficient: deff 8.3 xd36 (KDP)
Angular acceptance: 20 mrad-cm
Temperature acceptance: 25 C-cm

Spectral acceptance: 5.6 cm
Walk-off angle: 4.5 mrad (0.26)
Optical damage threshold: > 450 MW / cm,
(@ 1064 nm, 10 ns, 10 Hz)

 

Electro optic coefficients

Low frequency (pm/V)

High frequency (pm/V)

R13

9.5

8.8

R23

15.7

13.8

R33

36.3

35.0

R51

7.3

6.9

R42

9.3

8.8

Dielectric constant

Eeff= 13

Optical properties

Transmitting range:Density

350 4500 nm

 

Refractive indices
1064 nm
532 nm

nx
1.7377
1.7780

ny
1.7453
1.7886

nz
1.8297
1.8887

Sellmeier equations

nx2 = 3.0065 + 0.03901 / (l2 - 0.04251) 0.01327 l2
ny2 = 3.0333 + 0.04154 / (l2 0.04547) 0.01408 l2
nz2 = 3.0065 + 0.05694 / (l2 0.05658) 0.01682 l2

Therm optic coefficients

dnx / dT = 1.1 x 10-5 / C
dny / dT = 1.3 x 10
-5 / C
dnz / dT = 1.6 x 10
-5 / C

Absorption coefficient

αa < 1% cm-1 @ 1064 nm and 532 nm

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