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DKDP

Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (DKDP ) are among the most widely-used commercial NLO materials. They are commonly used for doubling, 
tripling and quadrupling of Nd3+ 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.
 
 Good UV transmission
 High optical damage threshold
 High birefringence High nonlinear coefficients
 
Physical and Optical Properties:
Please view NLO crysals Properities
 
The Sellmeier equations (l in µm ):
no2 = 1.9575544 + 0.2901391/(l2 - 0.0281399) - 0.02824391l2 
ne2 = 1.5005779 + 0.6276034/(l2 - 0.0131558) - 0.01054063l2
 
Application:
 Second, third, and fourth harmonic generation of Nd:lasers.
 Frequency doubling of dyer laser
 High power laser frequency conversion materials
 Shutter for high speed photography
 Electro-optical modulator and Q switches
DKDP Crystals Application
Designation Operation Input Output
53.7° SHG (II) 1064 nm 532 nm
59.5° THG (II) 1064 nm + 532 nm 355 nm
86° FHG (I) angle tune 532 nm 266nm
90° FHG (I) temp. tune 532 nm 266 nm
 
DKDP Specifications
Wavefront distortion: less than l/8 @ 633nm
Dimension tolerance: (W± 0.1mm) x (H±0.1mm) x (L + 0.2mm/-0.1mm)
Clear aperture: > 90% central area
Flatness: l/8 @ 633nm
Scratch/Dig code: 10/5 to MIL-O-13830A
Parallelism: better than 20 arc seconds
Perpendicularity: 5 arc minutes