Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (KDP) are among the most widely-used commercial NLO materials. They are commonlyused for doubling, tripling and quadrupling of Nd:YAG laser at the room temperature. In addition, they are also excellentelectro-optic crystals with high electro-optic coefficients, widely used as electro-optical modulators, Q-switches, and Pockels Cells, etc.
Capabilities:
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Width x Length:
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1x1 ~ 16x16mm
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Length:
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0.02 ~ 20mm
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Specifications:
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Angle tolerance:
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Δθ< ± 0.5°; Δφ< ±0.5°
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Dimensional Tolerance:
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(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm)
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Flatness:
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<λ/8 at 633nm
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Surface Quality:
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20/10 Scratch/Dig
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Parallelism:
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< 20 arc seconds
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Perpendicularity:
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< 5 arc minutes
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Wave front Distortion:
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<λ/8 at 633nm
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Clear Aperture:
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Central 95%
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Chamfer:
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0.15x45°
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Coating:
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* Protective coating is required to prevent polished surfaces from fogging.
* Anti-reflective coating should be considered if low reflectivity is required.
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Properties:
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KDP
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KD*P
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Chemical Formula
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KH2PO4
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KD2PO4
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Transparency Range
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200-1500nm
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200-1600nm
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Nonlinear Coefficients
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d36=0.44pm/V
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d36=0.40pm/V
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Refractive Index (at 1064nm)
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no=1.4938, ne=1.4599
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No=1.4948, ne=1.4554
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Electro-Optical Coefficients
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r41=8.8pm/V
r63=10.3pm/V
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r41=8.8pm/V
r63=25pm/V
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Longitudinal Half-Wave Voltage:
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Vp=7.65KV(l=546nm)
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Vp=2.98KV(l=546nm)
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Absorptance:
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0.07/cm
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0.006/cm
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Optical Damage Threshold:
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>5 GW/cm2
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>3 GW/cm2
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Extinction Ratio:
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30dB
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30dB
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Sellmeier Equations of KDP:
no2 = 2.259276 + 0.01008956/(l2 - 0.012942625) + 13.005522l2/(l2 - 400)
ne2 = 2.132668 + 0.008637494/(l2 - 0.012281043) + 3.2279924l2/(l2 - 400)
Sellmeier Equations of DKDP
no2 = 1.9575544 + 0.2901391/(l2 - 0.0281399) - 0.02824391l2 +0.004977826l4
ne2 = 1.5005779 + 0.6276034/(l2 - 0.0131558) - 0.01054063l2 +0.002243821l4
