DKDP Pockels cell
The DKDP (potassium dideuterium phosphate, KD₂PO₄) Pockels cell, also called a KD*P Pockels cell, is an electro-optic modulator with excellent overall performance. It offers low optical loss, a high extinction ratio, good electro-optic performance and environmental resistance. Applications include electro-optic Q-switching, high-speed camera switching, military and aerospace laser systems, frequency doubling and tripling of dye lasers in the 800nm band, and second-, third- and fourth-harmonic generation of 1064nm lasers. Because DKDP crystals are deliquescent and mechanically relatively weak, environmental control requires particular care. Operating temperature: 10 ℃–50 ℃, with temperature changes limited to 5 ℃ per 20 minutes. Ambient humidity: preferably below 40% over the long term, with humidity control such as a dry container or desiccant. Storage: keep the device in a drying cabinet when not in use to prevent deliquescence.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Insertion Loss | <0.2% |
| Wavefront distortion [@633nm] | <λ/6 @633nm |
| Voltage Extinction ratio | >2000:1(cp) >1500:1(cp) |
| Collimation | <0.5° |
| Quarter Wave Voltage | ～3400V |
| Surface Quality | 20/10 |
| Capacitance | 6～10pF |
| Clear Aperture Dimension | ≥90% |
| Coating [@1064nm (R<0.2%) or customized on request] | AR @1064nm (R<0.2%) or customized on request |
| Damage Threshold [@1064nm] | 1GW/cm² 10ns 10Hz @1064nm |
| Chemical formula | KD₂PO₄ |
| Transparency range | 200-1600nm |
| Nonlinear coefficient d₃₆ | d₃₆=0.40pm/V |
| Refractive Index | nₒ=1.4948,nₑ=1.4554 |
| Electro-optic coefficient | r₄₁=8.8pm/V,r₆₃=25pm/V |
| Longitudinal Half-Wave Voltage | Uπ=2.98KV(λ=546nm) |
| Optical damage threshold [@10ns 1064nm] | 1GW/cm² @10ns 1064nm |
| Extinction ratio | >30dB |
| Sellmeier equation | nₒ²=1.9575544+0.2901391λ²/(λ²-0.0281399)-0.0282439 |
| Sellmeier equation | nₑ²=1.5005779+0.6276034λ²/(λ²-0.0131558)-0.0105406 |
Key Features
Datasheet
Supplier Information
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