Potassium Titanyl Phosphate (KTP) is perfect nonlinear optical material suitable for use in a lot of different laser systems. KTP is liked because of its‘ stable physical properties and high nonlinear coefficient. That is why one of KTP usuall applications is to generate second harmonic for Nd:YAG ( 532 nm ) absorbing 1064 nm radiation. KTP also has physical properties which allows it to be used in electro-optic modulation and optical parametric generation.
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>0.5 GW/cm2 for 1064nm, 10ns, 10HZ (AR-coated)
>0.3 GW/cm2 for 532nm, 10ns, 10HZ (AR-coated
Transparency Range | 350~4500nm |
SHG Phase Matchable Range | 497 ~ 1800nm (Type II) |
Thermal-optic Coefficients (/°C) | dnx/dT=1.1X10-5 dny/dT=1.3X10-5 dnz/dT=1.6X10-5 |
Absorption Coefficients | <0.1%/cm at 1064nm <1%/cm at 532nm |
For Type II SHG of a Nd:YAG laser at 1064nm | Temperature Acceptance: 24°C·cm Spectral Acceptance: 0.56nm·cm Angular Acceptance: 14.2mrad·cm (φ);55.3mrad·cm (θ) Walk-off Angle: 0.55° |
NLO Coefficients | deff(II)≈(d24 – d15)sin2Φsin2θ – (d15sin2Φ + d24cos2Φ)sinθ |
Non-vanished NLO Susceptibilities | d31=6.5 pm/V d24=7.6 pm/V d32= 5 pm/V d15=6.1 pm/V d33=13.7 pm/V |
Electro-optic Coefficients: r13 r23 r33 r51 r42 | Low frequecy(pm/V) High frequency(pm/V) 9.5 8.8 15.7 13.8 36.3 35.0 7.3 6.9 9.3 8.8 |
Dielectric Constant | εeff=13 |
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=3.3134+0.05694/(λ2-0.05658)-0.01682λ2 |