Dimension Tolerance | (W±0.1mm) ×(H±0.1mm)× (L+0.2mm/-0.1mm) or (Dia ± 0.1mm)×(L+0.2/-0.1mm) |
Wavefront Distortion | < λ/8 @ 633nm |
Clear Aperture | > 90% of central area | Chamfer | ≤0.3mm @45° |
Flatness | λ/8 @ 633nm (L≥ 2.5mm) λ/4 @ 633nm (L< 2.5mm) |
Chips | ≤ 0.1mm |
Surface Quality | 20/10 S/D | Parallelism | < 10" |
Perpendicularity | ≤ 10' | Angle Tolerance | ≤ 0.2° |
Interior Quality | No visible scattering path or center under the inspection 50mW green laser |
Notes:
Physical and Optical Properties:
Chemical Formula | KD2PO4 | Curie Temperature | 222K |
Symmetry | 42m | Density | 2.355g/cm3 |
Absorption | 0.005/cm | Extinction Ratio | 1:10000 |
Deuterium Ratio | >98% | Transmission Band | 200-1600nm |
Non-linear Coefficient | d36=0.40pm/v | Longitudinal Half-wave Voltage | 2.98KV(I=546nm) |
Electric Resistance | >2x109Ώ/cm | Electric –optical Coefficient | r41=8.8pm/v, r63=25pm/v |
Potassium Dideuterium Phosphate (DKDP or KD*P ) Crystals are one the most widely-used commercial nonlinear crystal. The most distinctive merits of DKDP crystals include their good UV transmission, high damage threshold, and high birefringence, though their NLO coefficients are relatively low. KD*P crystals are usually used for Second Harmonic Generation (SHG), Third Harmonic Generation (THG), and Fourth Harmonic Generation (FHG) of Nd:YAG lasers at room temperature. In addition, Potassium Dideuterium Phosphate crystals also inherit high electro-optic coefficients, making them be widely used as Electro-Optical Modulators, such as EO Q-switches, and EO Pockels Cells, etc.
Hangzhou Shalom EO offers DKDP crystals for NLO applications and EO modulations, The crystals are high-quality guaranteed, exhibiting no visible scattering path or center under the observation of 50mW green laser. Further strict QC inspections are done in Shalom EO's cleanroom before despatch. Both crystal blanks and laser-grade-polished (20/10 Scratch/Dig) DKDP crystals are available.
Application Notes:
Designation | Operation | Input | Output |
53.7° | SHG (II) | 1064nm | 532nm |
59.5° | THG (II) | 1064nm + 532nm | 355nm |
63.7° | SFM (II) | 1064nm + (421-1000nm) | 302-515nm |
86° | FHG (I) angle tune | 532nm | 266nm |
90° | FHG (I) temp. tune | 532nm | 266nm |
36.6° | SHG (I) | 1064nm | 532nm |
46.8° | THG(I) | 1064nm + 532nm | 355nm |