DKDP
Introduction
Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium 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.
Good UV transmission
High optical damage threshold
High birefringence High nonlinear coefficients
Physical and Chemical Properties:
Please view NLO crysals physical Properities.
The Sellmeier equations (l in µm ):
no2=1.9575544+0.2901391/(l 2-0.0281399)-0.02824391l 2
Optical and Spectral Properties:
Please view NLO crysals optical and nonlinear optical Properities.
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
| KD*P Single Crystals — Standard | |||
| 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 | 266 nm |
| 90° | FHG (I) temp. tune | 532 nm | 266 nm |
| Dimension tolerance | (W ± 0.1 mm) x (H ± 0.1 mm) x (L + /-0.2 mm) |
| Transmitting wavefront distortion: | lambda/8 @ 633 nm |
| Clear aperture: | > 90% central area |
| Flatness: | lambda/8 @ 633 nm |
| Scratch/Dig code: | 10/5 to MIL-O-13830A |
| Parallelism: | better than 20 arc seconds |
| Perpendicularity: | 5 arc minutes |
| Angle tolerance: | Δθ < ±0.3°, Δφ < ± 0.3° |
| Quality Warranty Period: | one year under proper use. |
Note:
The AR coating on DKDP crystals is available from us.