KTP is an efficient nonlinear optical crystal in the visible to infrared spectral region. It has large nonlinear coefficient, the effective nonlinear optical coefficient of KTP deff at 1064nm is more than 15 times that of KDP.
Physical and Chemical Properties:
| Crystal Structure |
Orthorhombic,
Space group Pna21, Point group mm2 |
| Lattice Parameters(Å) |
a=6.404, b=10.615,
c=12.814, Z=8 |
| Melting Point (°C) |
~1172 |
| Mohs Hardness |
~5 |
| Density (g/cm3) |
3.0 |
| Hygroscopic |
no |
| Thermal Conductivity (W/cm/°C) |
0.13 |
| Thermal Expansion
Coefficients |
ax= 11 x 10-6
/°C
ay= 9 x 10-6/°C
az= 0.6 x 10-6/ °C |
|
| Electrical Conductivity |
3.5x10-8
s/cm (c-axis, 22°C, 1KHz) |
| Dielectric Constant
|
eeff
= 13 |
Optical and Nonlinear Properties:
| Transmitting Range |
350nm ~
4500nm |
| Phase Matching Range |
497nm ~ 3300nm |
| Electro-Optic Coefficients
(pm/V) |
|
Low frequency
|
High frequency
|
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 |
|
| Therm-Optic Coefficients |
Δnx/ΔT=1.1x10-5/°C
Δny/ΔT=1.3x10-5/°C
Δnz/ΔT=1.6x10-5/°C |
| Sellmeier Equations (λ in µm) |
nx2=3.0065
+ 0.03901/(λ2-0.04251)-0.01327λ2
ny2=3.0333 + 0.04154/(λ2-0.04547)-0.01408λ2
nz2=3.0065 + 0.05694/(λ2-0.05658)-0.01682λ2
|
| Effective Nonlinear Optical Coefficient |
| deff (II) ≈ (d24-
d15)sin2φsin2θ - (d15sin2φ
+ d24cos2φ)sinθ |
|
Main Applications:
- Frequency Doubling (SHG) of Nd Lasers for Green/Red output
- Frequency Mixing (SFM) of Nd Lasers and Diode Laser for Blue output
- Parametric Sources (OPG, OPA and OPO) for 600 - 4500nm Tunable output
- Electrical Optical (E-O) Modulators, Optical Switches, and Directional Couplers
- Optical Waveguides for Integrated NLO and E-O Devices
OSICO Specifications:
| Aperture |
up to 30x30
mm2 |
| Lenth |
up to 40 mm |
| Dimension Tolerance |
(W ±0.1mm)
x (H ±0.1mm) x (L +0.2mm/-0.1mm)
|
| Phase Matching Angle Tolerance |
Δθ<
±0.5°, Δφ< ±0.5° |
| Flatness |
λ/8 @
633nm |
| Wavefront Distortion |
< λ/4
@ 633nm |
| Surface Quality |
10/5 Scratch/Dig |
| Parallelism |
< 20 arc
minutes |
| Perpendicularity |
< 5 arc
minutes |
| Clear Aperture |
90% central
area |
| Edge Bevel |
0.15mm x 45°
±5° chamfer |
| AR Coating |
Dual band
R < 0.2% |
| Guaranteed Damage Threshold |
600 MW/cm2
(with coating) at 1064nm, for 10ns pulse |
|
