DKDP & KDP Crystal
Characterized by good UV transmission, high damage threshold, and high birefringence, Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (DKDP ) are among the most widely-used commercial NLO materials, though their NLO coefficients are relatively low. They are usually used for the doubling, tripling and quadrupling of Nd:YAG laser at room temperature. They are also excellent E-O crystals with high E-O coefficients, widely used as electro-optical modulators, such as Q-switches, Pockels Cells, etc. KDP and DKDP crystals are developed by water-solution method and can grow up to very big size. Therefore, they are good options for low-cost and large-size finished non-linear components, e.g. for frequency-doubling (SHG), frequency-tripling (THG) and frequency- quadrupling (FHG) of Nd:YAG laser at 1064nm.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dimension Tolerance [DKDP Crystal] | (W±0.1mm) × (H±0.1mm) × (L+0.2mm/-0.1mm) or (Dia. ± 0.1mm) ×(L+0.2/-0.1mm) |
| Wavefront Distortion [DKDP Crystal；633nm] | < λ/8 |
| Clear Aperture [DKDP Crystal] | > 90% of central area |
| Chamfer [DKDP Crystal；45°] | ≤0.3mm |
| Flatness [DKDP Crystal；@633 nm；L≥ 2.5mm] | λ/8 @ 633 nm (L≥ 2.5mm) |
| Flatness [DKDP Crystal；@633nm；L< 2.5mm] | λ/4 @ 633nm (L< 2.5mm) |
| Chip [DKDP Crystal] | ≤ 0.1mm |
| Surface Quality [S/D] [DKDP Crystal] | 20/10 |
| Parallelism [DKDP Crystal] | < 10" |
| Perpendicularity [DKDP Crystal] | ≤ 10' |
| Angle Tolerance [DKDP Crystal] | ≤ 0.2° |
| Damage Threshold [DKDP Crystal；1064nm, 10ns, 10Hz (uncoated)] | 1GW/cm2 for 1064nm, 10ns, 10Hz (uncoated) |
| Interior Quality [DKDP Crystal；inspected by 50mW green laser] | No visible scattering paths or centers [inspected by 50mW green laser] |
Datasheet
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