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| Nonlinear crystals KDP, DKDP and ADP | |
| 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. 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. DKDP crystals can be supplied with a deuteration level of >94%, >96% and >98%. <<<Back |
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