OST Photonics KDP Crystals/DKDP Laser Nonlinear Crystals

Tolerance of dimension

Dimension+0/-0.1 mm，L：±0.1mm

Flatness

λ/10 @ 632.8nm

Wavefront distortion

λ/8@ 632.8nm

Surface quality

10/5 per MIL-O-13830A

Parallelism

20″

Perpendicularity

10′

Clear Aperture:

> 90%

Chamfer:

< 0.1 mm @ 45°

Size

Upon customer request

Coating

AR/HR coating upon customer’s request

Damage Threshold

750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Quality Warranty Period

One year under proper use

Chemical Formula

KH2PO4

KD2PO4

Transparency Range

200-1500nm

200-1600nm

Nonlinear Coefficients

d36=0.44pm/V

d36=0.40pm/V

Refractive index (@1064nm)

no=1.4938，ne=1.4599

no=1.4948，ne=1.4554

Electro-optical Coefficients

r41=8.8pm/V

r63=10.3pm/V

r41=8.8pm/V

r63=25pm/V

Longitudinal half-wave voltage

Vπ=7.65KV(λ=546nm)

Vπ=2.98KV(λ=546nm)

Absorptance

0.07/cm

0.006/cm

Optical damage threshold

＞5GW/cm2

＞3GW/cm2

Extinction ratio

30dB

Sellmeier equations of KDP (λ in μm)

no²=2.259276+0.01008956/(λ²-0.012942625)+13.00522λ²/(λ²-400)
ne²=2.132668+0.008637494/(λ²-0.012281043)+3.2279924λ²/(λ²-400)

Sellmeier equations of KD*P (λ in μm)

no²=1.9575544+0.2901391λ²/(λ²-0.0281399)-0.02824391λ²+0.004977826λ4
ne²=1.5005779+0.6276034λ²/(λ²-0.0131558)-0.01054063λ²+0.002243821λ4