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KDP, DKDP Crystals

Three laser crystals in transparent gray color of KDP and DKDP type

KDP, DKDP Crystals

Wavelength range

160 – 1800 nm

Aperture dimensions

5 – 100 mm

Orientation accuracy of cut angle

<30 arcmin

Surface quality, S-D


Transmitted wavefront distortion, P-V

<λ/8 @ 632.8 nm

Crystal deuteration



>1010 ohm-cm in all three crystallographic directions

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KDP, DKDP – Nonlinear crystals

Nonlinear deuterated potassium dihydrogen phosphate (DKDP) and KDP crystals can be used for a variety of applications due to their large nonlinear optical and electro-optical coefficients.

In nonlinear optics these crystals are most commonly used as the second, third, and fourth harmonic generators for Nd:YAG and Nd:YLF lasers. In electro-optical applications, DKDP crystals are a fairly common choice for Pockels cell production and they also can be used as Q-switches for Nd:YAG, Nd:YLF, Ti:Sapphire and Alexandrite lasers.

Altechna offers DKDP crystals with deuteration values of up to 99% and custom sizes are available.


  • Good UV transmission
  • High optical damage threshold
  • High birefringence
  • Negative thermal lensing

Please contact our support team with any questions you may have.


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