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  • 名称: DKDP Pockels Cell
  • 编号: 122
  • 上传时间: 2014-08-01
  • 浏览次数: 665

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 polarizers, 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.

APPLICATION:

Industrial laser system

Medical Laser system

Aesthetic Laser system

Military Laser system

ADVANTAGE:

High Extinction Ratio

Low Insertion Loss

High damage threshold

Wide working temperature range

Low capacitance

Low current Leakage

 

Voltage Extinction Ratio

>2000:1(CP)

>1500:1(PP)

Collimation

<0.5°

Insertion Loss

<2%

Wavefront distortion

λ[email protected]

Quarter-wave voltage

~3400V

Scratch/Dig

20/10

Capacitance

6-10pF

Clear Aperture

≥90%

Current Leakage

<1μA

   

Coatings

[email protected](R<0.2%), or customised upon request

Damage threshold

1GW/cm² 10ns 10Hz at 1064nm

 

CP: Cross Polarizers  PP: Parallel Polarizers

Standard Products     Operation wavelength: 1064nm

P/N

Clear Aperture

Size(mm)

Voltage

Extinction Ratio

Capacitance

QD08H

Φ8mm

Φ19×28mm

>2000:1  (CP)

>1500:1  (PP)

6pF

QD10H

Φ10mm

Φ25.4×39mm

>2000:1  (CP)

>1500:1  (PP)

6pF

QD12H

Φ12mm

Φ25.4×44mm

>2000:1  (CP)

>1500:1  (PP)

8pF

QD15H

Φ15mm

Φ30×44mm

>2000:1  (CP)

>1500:1  (PP)

9pF

CP: Cross Polarizers  PP: Parallel Polarizers

 

 

Chemical Formula

KD2PO4

Transparency Range

200-1600nm

Nonlinear Coefficients

d36=0.40pm/V

Refractive index (at 1064nm)

No=1.4948, ne=1.4554

Electro-optical Coefficients

r41=8.8pm/V
r63=25pm/V

Longitudinal half-wave voltage:

Vπ=2.98KV(λ=546nm)

Absorptance:

0.006/cm

Optical damage threshold:

>3 GW/cm2

Extinction ratio:

>30dB

Sellmeier equations of KD*P:(λ in um)

no2=1.9575544+0.2901391λ2/(λ2-0.0281399)-0.02824391λ2+0.004977826λ2
ne2=1.5005779+0.6276034λ2/(λ2-0.0131558)-0.01054063λ2+0.002243821λ2