Model KDP, DKDP and ADP - Nonlinear Crystals
Potassium dihydrophosphates KDP (KH2PO4), DKDP or D*KDP (KD2PO4) and ADP (NH4H2PO4) are widely used as the second, third and fourth harmonic generators for Nd:YAG and Nd:YLF lasers. The 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 and as for acousto-optical applications. 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 KDP and DKDP. For frequency - quadrupling (4HG, output at 266 nm) of Nd:YAG laser, KDP crystal is normally recommended.
We provide as-cut unpolished blocks, polished high quality KDP, ADP and DKDP crystals in rods, squares or other shapes according to customer`s requirements.
DKDP crystals can be supplied with a deuteration level of >94%, >96% and >98%.
