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Potassium Deuterium Phosphate (KD*P } are among the most widely-used commercial NLO materials. They are commonly used for doubling, tripling and quadrupling of Nd:YAG laser at the room temperature. In addition, they are also excellent electro-optic crystals with high electro-optic coefficients, widely used as electro-optical modulators, Q-switches, and Pockels Cells, etc.
| Flatness | λ/8 at 633nm |
| Parallelism | ≤20 arcsec |
| Wavefront Distortion | λ/8 at 633nm |
| Surface Quality | 20-10 |
| Perpendicularity | ≤5 arcmin |
| Angle tolerance | ≤± 0.25° |
| Dimension tolerance | ± 0.1mm |
| Clear Aperture | 90% of central area |
| Chamfer | ≤0.2mmx45° |
| Chip | ≤0.1mm |
| Damage Threshold | 1GW/cm2 1064nm 10ns 10Hz for DKDP |

