China OEM Yvo4 - KDP & DKDP Crystal – WISOPTIC

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China OEM Yvo4 - KDP & DKDP Crystal – WISOPTIC Detail:

KDP (KH₂PO₄) and DKDP/KD*P (KD₂PO₄) 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.

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).

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.

Contact us for the best solution for your application of KDP/DKDP crystals.

WISOPTIC Advantages - KDP/DKDP

• 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

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.

dkdp
DKDPfe
KD-2

DOWNLOAD Technical Data – KDP & DKDP

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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)	n_o=1.4938, n_e=1.4601	n_o=1.5066, n_e=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=8.8 pm/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

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We believe that long expression partnership is often a result of top of the range, value added service, prosperous encounter and personal contact for China OEM Yvo4 - KDP & DKDP Crystal – WISOPTIC, The product will supply to all over the world, such as: Korea, USA, Juventus, What is good price? We provide customers with factory price. In the premise of good quality, efficiency must be paid attention to and maintain appropriate low and healthy profits. What is a fast delivery? We make the delivery according to customers' requirements. Although delivery time depends on the order quantity and the complexity of it, we still try to supply products in time. Sincerely hope we could have long term business relationship.

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