KTP |
Potassium Titanium Oxide Phosphate (KTiOPO4 ), or KTP, is an efficient nonlinear optical crystal in the visible to infrared spectral region with relatively low cost. It has large nonlinear coefficient. The effective nonlinear optical coefficient of KTP deff at 1064nm is more than 1.5 times that of BBO. It's damage threshold is near 1 GW/cm2 for 1 Hz 10 ns pulses at 1064nm. However, it is now limited to moderate to low power applications due to it's gray-tracking problem.
|
|
KTP Structural and Physical Properties
Crystal structure
|
Orthorhombic, space group Pna21,point group mm2
|
Cell parameters
|
a=6.404Å, b=10.616Å, c=12.814Å, Z=8
|
Melting point
|
1172ã¡C incongruent
|
Curie point
|
936°C
|
Mohs hardness
|
»5
|
Density
|
3.01 g/cm3
|
Color
|
colorless
|
Hygroscopic susceptibility
|
no
|
Specific heat
|
0.1643 cal/g°C
|
Thermal conductivity
|
0.13 W/cm/°K
|
Electrical conductivity
|
3.5x10-8 s/cm (c-axis, 22°C, 1KHz)
|
|
KTP Specifications:
Transmitting wavefront distortion
|
less than l/4 @ 633 nm
|
Dimension tolerance
|
(W ± 0.1 mm) x (H ± 0.1 mm) x (L + 0.2 mm/-0.1 mm)
|
Clear aperture
|
> 90% central area
|
Flatness
|
l/8 @ 633 nm
|
Scratch/Dig code
|
10/5 to MIL-O-13830A
|
Parallelism
|
better than 20 arc seconds
|
Perpendicularity
|
5 arc minutes
|
Angle tolerance
|
Dθ < ±0.5°, Dф < ± 0.5°
|
Chip
|
≤0.1 mm
|
|
|
|
Standard Products
Dimension
|
Application
|
Coating
|
Type
|
2x2x3mm
|
SHG@1064nm
|
AR/HR coating
|
II
|
2x2x5mm
|
SHG@1064nm
|
AR/AR coating
|
II
|
3x3x5mm
|
SHG@1064nm
|
DBAR-coating
|
II
|
3x3x10mm
|
SHG@1064nm
|
DBAR-coating
|
II
|
7x7x5mm
|
SHG@1064nm
|
DBAR-coating
|
II
|
8x8x5mm
|
SHG@1064nm
|
DBAR-coating
|
II
|
9x9x7mm
|
SHG@1064nm
|
DBAR-coating
|
II
|
7x7x20mm
|
OPO for 1064nm&1570nm
|
AR coating
|
II
|
|
|