Nonlinear Crystals

DKDP

Deuterated potassium dihydrogen phosphate, DKDP or KD*P, changes birefringence under an applied electric field. Combined with a polarizer, it forms a Pockels-cell Q-switch; optical absorption and the selected wavelength constrain its use.

Properties, applications and specifications

DKDP reference illustration

KD*P (Potassium Dideuterium Phosphate) is the most widely used material for electro-optical applications due to its excellent E-O properties. An electro-optic material such as KD*P can alter the polarization state of light passing through it, when an applied voltage induces birefringence change in the crystal. When used in conjunction with polarizer’s, the KD*P pockels cell can function as optical Q-switch to generate laser pulses. KD*P is used for applications from UV up to around 1.1 µm where absorption limits its use in active cavities, although it can be useful at longer wavelengths when a few percent of absorption can be tolerated.

Industrial laser system

Medical Laser system

Aesthetic Laser system

Military Laser system

Specification of DKDP cell

Voltage Extinction Ratio
>2000:1(CP)
>1500:1(PP)
Collimation
<0.5°
Insertion Loss
<2%
Wavefront distortion
λ/6@633nm
Quarter-wave voltage
~3400V
Scratch/Dig
20/10
Capacitance
6-10pF
Clear Aperture
≥90%
Coatings
AR@1064nm(R<0.2%), or customized upon request
Damage threshold
1GW/cm² 10ns 10Hz at 1064nm

Standard Products of DKDP cell

P/N
Clear Aperture
Housing Size(mm)
Voltage
Extinction Ratio
Capacitance
Wavelength
LA08H-01
Φ8mm
Φ19×28mm
>2000:1  (CP)
>1500:1  (PP)
<6pF
1064nm
LA10H-01
Φ10mm
Φ25.4×39mm
>2000:1  (CP)
>1500:1  (PP)
<6pF
1064nm
LA12H-01
Φ12mm
Φ25.4×44mm
>2000:1  (CP)
>1500:1  (PP)
<8pF
1064nm
LA15H-01
Φ15mm
Φ30×44mm
>2000:1  (CP)
>1500:1  (PP)
<9pF
1064nm
LA08H-02
Φ8mm
Φ19×28mm
>2000:1  (CP)
>1500:1  (PP)
<6pF
755nm
LA10H-02
Φ10mm
Φ25.4×39mm
>2000:1  (CP)
>1500:1  (PP)
<6pF
755nm

For DKDP crystals SHG application, Please ask for the supplier to get more information.

DKDP reference illustration

For DKDP crystals SHG application, Please ask for the supplier to get more informat

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