KTP (Potassium Titanium Oxide Phosphate)

GAMDAN hydrothermally-grown KTP offers

  • Exceptionally low absorption (fully calibrated) <10ppm/cm @1064nm, <300ppm/cm@532nm (10-100x lower than flux-grown KTP)
  • Excellent Homogeneity, WFD of ?/10 @633nm
  • UV grade super polish for optimal high-power performance, Roughness: <3?, S/D of 0/0
  • Exceptional performance in long pulse high power medical lasers 

 

GAMDAN Flux-grown KTP offers

  • Excellent Homogeneity, WFD of ?/10 @633nm
  • UV grade super polish for optimal high-power performance, Roughness: <3?, S/D of 0/0
  • Highly Competitive pricing for volume application

 

Physical Properties:

Crystal Structure
Orthorhombic
Point Group
mm2
Melting Point
1172°C incongruent
Lattice Parameters
a=6.404Ã… b=10.615Ã… c=12.814Ã… Z=8
Temperature of Decomposition
~1150°C
Transition Temperature
936°C
Mohs Hardness
~5
Density
2.945 g/cm3
Color
colorless
Hygroscopic Susceptibility
no
Specific Heat
0.1737 cal/g.°C
Thermal Conductivity
0.13 W/cm/°C
Electrical Conductivity
3.5x10-8 s/cm (c-axis, 22°C, 1KHz)
Thermal Expansion Coefficients
a1 = 11 x 10-6 °C-1
a2 = 9 x 10-6 °C-1
a3 = 0.6 x 10-6 °C-1
Thermal Conductivity Coefficients
k1 = 2.0 x 10-2 W/cm °C
k2 = 3.0 x 10-2 W/cm °C
k3 = 3.3 x 10-2 W/cm °C
Dielectric Constant
eeff = 13

 

Optical Properties:

Transmitting Range
350nm ~ 4500nm
Refractive Indices
 
nx
ny
nz
1064nm
1.7400
1.7469
1.8304
532nm
1.7787
1.7924
1.8873
Absorption Coefficients
a < 1%/cm @1064nm and 532nm
Therm-Optic Coefficients
dnx/dT=1.1x10-5/°C
dny/dT=1.3x10-5/°C
dnz/dT=1.6x10-5/°C
Electro-Optic Coefficients
 
Low frequency (pm/V)
High frequency 
(pm/V)
r13
9.5
8.8
r23
15.7
13.8
r33
36.3
35.0
r51
7.3
6.9
r42
9.3
8.8
Sellmeier Equations
nx2=2.10468 + 0.89342l2/(l2-0.04438)-0.01036l2
ny2=2.14559 + 0.87629l2/(l2-0.0485)-0.01173l2 
nz2=1.9446 + 1.3617l2/(l2-0.047)-0.01491l2

 

Nonlinear Optical Properties

Phase Matching Range
497nm - 3300 nm

Nonlinear Coefficients (@1064nm)
d31=2.54pm/V, d31=4.35pm/V, d31=16.9pm/V
d24=3.64pm/V, d15=1.91pm/V at 1.064 mm
Effective Nonlinear Optical Coefficients
deff (II) ? (d24 - d15)sin2q¸sin2f - (d15sin2f + d24cos2f)sinq

 

Type II SHG of 1064nm Laser

Phase Matching Angle
q=90° f=23.2°

Effective Nonlinear Optical Coefficients
deff  ≈8.3 x d36(KDP) 
Angular Acceptance
Dq = 75 mrad Df= 18 mrad
Temperature Acceptance
25°C.cm
Spectral Acceptance
5.6 m
Walk-Off Angle
1 mrad
Optical Samage Threshold
1.5-2.0MW/cm2

 

Main Specification:

Dimension
1x1x0.05mm - 30x30x40mm
Phase Matching Type
Type II, q=90° f=phase-matching angle
a) S1&S2: AR @1064nm R<0.1%; AR @ 532nm, R<0.25%.
b) S1: HR @1064nm, R>99.8%; HT @808nm, T>5%, S2: AR @1064nm, R<0.1%; AR @532nm, R<0.25%
Typical Coating
Customized coating available upon customer request.
Angle Tolerance
6'
Dimension Tolerance
Dq< ±0.5°, Df< ±0.5°, ±0.02 - 0.1 mm
Flatness
(W ±0.1mm) x (H ±0.1mm) x (L + 0.2mm/-0.1mm) for NKC series
l/8 @ 633nm10/5 Scratch/dig per MIL-O-13830A
<10'
Scratch/Dig Code
better than 10 arc seconds for NKC series
Parallelism
5'
Perpendicularity
5 arc minutes for NKC series
Wavefront Distortion
less than l/8 @ 633nm
Clear Aperture
90% central area
Working Temperature
25°C- 80°C
Homogeneity
dn ~10-6/cm 

 

Download in PDF Format:

Datasheet (PDF)