Parameter

KDP

DKDP

Chemical Formula

KH2PO4

KD2PO4

Lattice parameter

a=b=7.4529, c=6.9751

a=b=7.4697, c=6.9766

Density

2.332g/cm3

2.355g/cm3

Moh's hardness

2.5

2.5

transparent ranges

180~1550nm

200~2150nm

The curie temperature

~396℃

~455℃

nonlinear coefficient

d36=0.44pm/V

d36=0.40pm/V

reflective index(1064nm)

no=1.4938, ne=1.4599

no=1.4948, ne=1.4554

electro-optic coefficient

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)

absorptivity

0.07/cm

0.006/cm

laser-damaged threshold

>5GW/cm2

>3GW/cm2

extinction

30dB

30dB

Deliquescence characteristics

easy

easy

Sellmeier of KDP

no2= 2.259276+0.01008956/(λ2-0.012942625)+ 13.005522λ2/(λ2-400)

ne2= 2.132668+0.008637494/(λ2-0.012281043)+ 3.2279924λ2/(λ2- 400)