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Potassium Titanyl Phosphate
(KTP)
KTP is a nonlinear optical (NLO) material known for its high NLO coefficient,
wide transparency range and temperature synchronism, it has a moderate optical
damage threshold. The single crystal KTP is commonly used for effective
nonlinear transformation of laser radiation, the most popular application is for
Second Harmonic Generation (SHG).
Maximum available size: 20 x 20 x 20 mm. Finished KTP optical components can be
supplied with double narrow band antireflection coating.
Main Properties
| Chemical Formula |
KTiOPO4 |
| Crystal Structure |
Orthorhombic |
| Lattice Constant, Å |
a=12.814
b=6.404
c= 10.616 |
| Density, g/cm3 at 293 K |
3.03 |
| Melting Temperature, K |
1450 |
Thermal Expansion, 1/K at 373 K
a1
a2
a3 |
8.7 x 10-6
10.5 x 10-6
-0.2 x 10-6 |
| Hardness (Mohs) |
~5 |
| Transmittance Range, mm |
0.35-4.5 |
| Average Refractive Index |
1.8 |
|
Spectral Refractive Index
l=0.532 mm
l=1.064 mm
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nx=1.779
ny=1.789
nz=1.889
nx=1.738
ny=1.746
nz=1.830 |
Nonlinear Coefficients, pm/V
1064 nm to 532 nm |
d31=6.5
d32=5.0
d33=13.7
d34=6.1 |
SHG of Type II (1064 nm), pm/V
Conversion Efficiency, %
Phase-matching angle to X in XY plane |
deff=7.4
45-67
22°
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Synchronism Width:
temperature, oC x cm
spectral, Å x cm
angle, mrad x cm |
25
5.5
16.0
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| Optical Damage Threshold, MW/cm2 |
10-40 |
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