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 DKDP / KD*P Crystal Properties


Optical Properties

Units

Value

Transmission/Transparency Range

nm

200 - 2150

Refractive Index (n) @1064nm


n= 1.4931

ne = 1.4583

                                 @532nm


n= 1.5074

ne = 1.4683

                                 @355nm


n= 1.5257

ne = 1.4833

                                 @266nm


n= 1.5539

ne = 1.5071

Non-linear Coefficient @1.06µm (d₃₆)

pm/V

0.4

 Effective Nonlinear Coefficients:        Type I

                                               Type II


dooe=d₃₆ x sinθ x sin2φ

deoe=d₃₆ x sin2θ x cos2φ

 Absorption Coefficient @1.06µm

cm¹

0.005

Physical / Thermal Properties

Units

Value

 Chemical Formula


KD₂PO₄

 Crystal Symmetry/Structure


Tetragonal

 Point Group


42m

Melting Point

ºC

240

 Thermal Expansion Coeff. @20ºC

 10‾⁶/ºC

┴19.0

║   44

Thermal Conductivity Coeff. @20ºC

W/m/ºK

┴1.9

║ 2.1

 Specific Heat Capacity

 J/g K

TBA

 Density  

g/cm³

2.355

 Mohs Hardness


2.5

 Optical Damage Threshold @1.06/ºC,10ns

GW/cm²

0.5

 DKDP / KD*P Crystal - Sellmeier Equations


no² = 1.9575544 + 0.2901391/(λ² - 0.0281399) - 0.02824391λ²+0.004977826λ

ne² = 1.5005779 + 0.6276034/(λ² - 0.0131558) - 0.01054063λ² +0.002243821λ




  








  DKDP / KD*P Crystal - Availability


                      

  








Potassium Dihydrogen Phosphate (KDP) and Potassium Dideuterium Phosphate (KD*P, DKDP) crystals

are amongst the most widley used nonlinear crystals. Both of these crystals are routinely used for the

doubling, tripling and quadrupling of Nd:YAG lasers at room temperatures. In addition, their excellent

electro-optic coefficients mean that they are widely employed as EO modulators, Q-switches and Pockels cells.


DKDP / KD*P crystal strengths include:



DKDP / KD*P applications include:












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 DKDP Crystals / KD*P Crystals


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  DKDP / KD*P Crystal - Common Configurations


Application/Operation

Input

nm

Output

nm

Theta

Phi

SHG (Type II)

1064

532

53.7

0

THG (Type II)

1064+532

355

59.5

0

SFM (Type II)

1064+(421-1000)

302 - 515

63.7

0

FHG (Type I) - Angle Tune

532

266

86

0

FHG (Type I) - Temp Tune

532

266

90

0

SHG (Type I)

1064

266

36.6

0

THG (Type II)

1064 + 532

532

46.8

0