Crystals Materials
KDP, KD*P (DKDP) Crystal for SHG, THG and SFG applications
Potassium Dihydrogen Phosphate (KDP crystal) and Potassium Dideuterium Phosphate (KD*P or DKDP crystal) has a high nonlinear coefficient, which allows it to efficiently convert laser radiation to higher frequencies, such as second harmonic generation (SHG), third harmonic generation (THG), and sum-frequency generation (SFG).
| Thickness/Diameter Tolerance | ±0.05 mm |
| Orientation Tolerence | < 0.5° |
| Size | 3 mm ~ 150 mm or Upon customer request |
| Dimension Tolerances | ±0.05 mm |
| Surface Quality | 10/5 S/D per MIL-O-13830A |
| Parallelism | < 10 arcsec |
| Perpendicularity | < 5 arcmin |
| Clear Aperture | > 90% |
| Wavefront Distortion | λ/8 @ 633 nm |
| Surface Flatness | < λ/8 @ 632.8 nm |
| Chamfer | < 0.1 mm @ 45° |
| Coating | AR/HR/PR coating upon customer's request |
| Chemical Formula | KH2PO4 |
|---|---|
| Transparency Range | 200 nm - 1500nm |
| Nonlinear Coefficients | d36=0.44 pm/V |
| Refractive index (@1064 nm) | no=1.4938, ne=1.4599 |
| Electro-optical Coefficients | r41=8.8 pm/V; r63=10.3 pm/V |
| Longitudinal half-wave voltage | Vπ=7.65 KV (λ=546 nm) |
| Absorptance | 0.07/cm |
| Optical damage threshold | > 5 GW/cm2 |
| Chemical Formula | KD2PO4 |
|---|---|
| Transparency Range | 200 nm - 1600nm |
| Nonlinear Coefficients | d36=0.40 pm/V |
| Refractive index (@1064 nm) | no=1.4948, ne=1.4554 |
| Electro-optical Coefficients | r41=8.8 pm/V; r63=25 pm/V |
| Longitudinal half-wave voltage | Vπ=2.98 KV(λ=546 nm) |
| Absorptance | 0.006/cm |
| Optical damage threshold | > 3 GW/cm2 |
Stock specification list
If need other specifications and quantities products, please contact us(sales@aogcrystal.com).
AR/HR/PR coatings are available at your specified wavelength.
Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
KDP, KD*P (DKDP) Crystal is relatively soft and therefore requires precautions to protect its polished surfaces.
When angle adjusting is necessary, keep in mind that the acceptance angle of KDP, KD*P (DKDP) Crystal is small.
| Part Number | Size | Theta, θ | Phi, φ | Coating S1/S2 | Application |
|---|---|---|---|---|---|
| KDP-Cry-001 | 12x12x5 mm | 76.5 | 45 | AR@532+266/532+266 nm | SHG@532 nm |
| KDP-Cry-002 | 15x15x7 mm | 76.5 | 45 | AR@532+266/532+266 nm | SHG@532 nm |
| DKDP-Cry-001 | 12x12x20 mm | 53.5 | 0 | AR@1064/1064+532 nm | SHG@1064 nm |
| DKDP-Cry-001 | 12x12x20 mm | 59.5 | 0 | AR@1064+532/355 nm | SHG@1064 nm |
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