KDP&DKDP Crystal

High deuteration ratio (>98.0%)
High homogeneity
Excellent internal quality
Top finish quality with high processing precision
Large block for various size and shapes
Very competitive price
Mass production, quick delivery

  Contact Now
Product Details

KDP (KH2PO) and DKDP/KD*P (KD2PO) are among the most widely-used commercial NLO materials. With good UV transmission, high damage threshold, and high birefringence, these material are usually used for doubling, tripling and quadrupling of Nd:YAG laser.


KDP&DKDP Crystal


With high E-O coefficient, KDP and DKDP crystals are also widely used to make Pockels cells for laser system, such as Nd:YAG, Nd:YLF, Ti-Sapphire, Alexandrite, etc. Even though DKDP with high deuteration is more commonly used, KDP and DKDP both can do phase matching of type I and type II for the SHG and THG of 1064nm Nd:YAG laser. We recommend KDP for FGH of Nd:YAG laser (266nm).


KDP&DKDP Crystal


As one of the major KDP/DKDP suppliers (source manufacturer) in the whole international market, WISOPTIC has high capability of material selection, processing (polishing, coating, gold-plating, etc). WISOPTIC confirms reasonable price, mass production, quick delivery and long guarantee period of these materials.


KDP&DKDP Crystal


WISOPTIC Standard Specifications* - KDP/DKDP 


Deuteration Ratio

> 98.00%

Dimension Tolerance

± 0.1 mm

Angle Tolerance

≤ ± 0.25°

Flatness

< λ/8 @ 632.8 nm

Surface Quality

< 20/10 [S/D] (MIL-PRF-13830B)

Parallelism

< 20”

Perpendicularity

≤ 5'

Chamfer

≤ 0.2mm @ 45°

Transmitted Wavefront Distortion

< λ/8 @ 632.8 nm

Clear Aperture

> 90% of central area

Laser Damage Threshold

> 500 MW for 1064nm, TEM00, 10ns, 10Hz (AR-coated)
> 300 MW for 532nm, TEM00, 10ns, 10Hz (AR-coated)

* Products with special requirement upon request.


Main Features - KDP/DKDP


• Good UV transmission
• High optical damage threshold
• High birefringence
• High nonlinear coefficients


Primary Applications - KDP/DKDP


• Laser frequency conversion – Second, third, and fourth harmonic generation for high pulse energy, low repetition (<100 Hz) rate lasers
• Electro-optical modulation
• Q-switching crystal for Pockels cells


Physical Properties - KDP/DKDP


  Crystal

KDP

DKDP

Chemical formula

KH2PO4

KD2PO4

Crystal structure

I42d

I42d

Space group

Tetragonal

Tetragonal

Point group

42m

42m

Lattice constants

a=7.448 Å, c=6.977 Å

a=7.470 Å, c=6.977 Å

Density

2.332 g/cm3

2.355 g/cm3

Mohs hardness

2.5

2.5

Melting point

253 °C

253 °C

Curie temperature

-150 °C

-50 °C

Thermal conductivity [W/(m·K)]

k11= 1.9×10-2

k11= 1.9×10-2, k33= 2.1×10-2

Thermal expansion coefficients (K-1)

a11= 2.5×10-5, a33= 4.4×10-5

a11= 1.9×10-5, a33= 4.4×10-5

Hygroscopicity

high

high


 Optical Properties - KDP/DKDP 


  Crystal

KDP

DKDP

Transparency region
  (at “0” transmittance level)

176-1400 nm 

200-1800 nm 

Linear absorption coefficients
(@ 1064 nm)

0.04 /cm

0.005 /cm

Refractive indices (@1064 nm) 

no=1.4938, ne=1.4601 

no=1.5066, ne=1.4681 

NLO coefficients (@1064 nm) 

d36=0.39 pm/V

d36=0.37 pm/V

Electro-optic coefficients

r41=8.8 pm/V, r63=10.3 pm/V

r41=8.8pm/V,r63=25 pm/V 

Longitudinal half-wave voltage

7.65 kV (λ=546 nm)

2.98 kV (λ=546 nm)

SHG conversion efficiency

20~30%

40~70%


 Phase matching angle for SHG of 1064 nm



KDP

DKDP

Type of phase matching

Type 1 ooe

Type 2 eoe

Type 1 ooe

Type 2 eoe

Cut angle θ

41.2°

59.1°

36.6°

53.7°

Acceptances for crystal of 1 cm length (FWHM):

Δθ (angle)

1.1 mrad

2.2 mrad

1.2 mrad

2.3 mrad

ΔΤ (thermal)

10 K

11.8 K

32.5 K

29.4 K

Δλ (spectral)

21 nm

4.5 nm

 6.6 nm

4.2 nm

Walk-off angle

28 mrad

25 mrad

25 mrad

25 mrad
















KDP&DKDP Crystal Test Report


KDP&DKDP Crystal Test Report


Leave your messages

Related Products

Popular products