Opt⚙City ®-Quality Crystal & Optical Components
Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (KD*P, DKDP) are among the most widely-used commercial NLO crystals, characterized by good UV transmission, high damage threshold, and high birefringence, though their NLO coefficients are relatively low. KDP crystals are usually used for doubling, tripling and quadrupling of a Nd:YAG laser at the room temperature. KD*P are excellent electro-optic crystals with high electro-optic coefficients, widely used as electro-optical modulators, such as Q-switches, Pockels Cells, etc.
KDP and KD*P are hygroscopic, a sealed housing with transmitting windows is recommended for protection of the crystal faces.
Refractive Index (at 1064nm)
Longitudinal Half-Wave Voltage:
d 36 =0.44pm/V
Vp =7.65KV @546nm
d 36 =0.40pm/V
Vp =2.98KV @546nm
Sellmeier Equations of KDP (λ in μm):
No 2 = 2.259276 + 0.01008956/( λ2 - 0.012942625) +13.005522λ2 /(λ2 - 400)
Ne 2 = 2.132668 + 0.008637494/( λ2 - 0.012281043) +3.2279924λ2 /(λ2 - 400)
Sellmeier Equations of KD*P (λ in μm):
No 2 = 1.9575544 + 0.2901391/( λ2 - 0.0281399) - 0.02824391λ2 +0.004977826 λ4
Ne 2 = 1.5005779 + 0.6276034/( λ2 - 0.0131558) - 0.01054063λ2 +0.002243821 λ4
English 中文 Português Deutscheрусскийعربى Españolfrançais日本語