KDP and DKDP Crystals
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Nonlinear single crystals Pottasium Dideuterium Phosphate KDP and DKDP are widely used as the second, third and fourth harmonic generators for Nd:YAG and Nd:YLF lasers.
Crystals are also widely used for electro-optical applications as Q-switches for Nd:YAG, Nd:YLF, Ti:Sapphire and Alexandrite lasers, as well as for Pockels cells. The most commonly used electro-optical crystal is DKDP with a deuteration more than 98%. These crystals are grown by a water-solution method and can be grown up to very large sizes. Therefore, they are as low-cost and large-size finished non-linear components available. For frequency-doubling (SHG) and -tripling (THG) of Nd:YAG laser at 1064 nm, both type I and type II phase-matchings can be employed for Nonlinear single crystals KDP and DKDP. For frequency - quadrupling (4HG, output at 266 nm) of Nd:YAG laser KDP crystal is normally recommended.
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- Good UV transmission
- High optical damage threshold
- High birefringence
- High nonlinear coefficients
- Aperture, Length:12x12x20mm - 12x12x5mm - 15x15x13mm -15x15x20mm - 15x15x7mm
- Orientation accuracy of cut angle: < 30 arcmin
- Optical damage threshold: >10 GW/cm² (for KDP) and >0.5 GW/cm² (for DKDP)