KTP is the most commonly used material for frequency doubling of Nd:YAG laser. It is an excellent nonlinear optical crystal suitable for a wide range of applications.
Large nonlinear optical coefficient
Wide angular bandwidth and small walk-off angle
Broad temperature and spectral bandwidth
High electro-optic coefficient and low dielectric constant
Nonhydroscopic, chemically and mechanically stabl
SPECIFICATIONS | |
Dimension Tolerance | (W±0.1mm)×(H±0.1mm)×(L±0.2mm/0.1mm) |
Angle Tolerance | Δθ＜±0.2°；Δφ＜±0.2° |
Parallelism | ＜30" |
Perpendicularity | ＜10′ |
Clear Aperture | ≥Central 90% of the diameter |
Surface Quality (Scratch/Dig) | 20/10 (MIL-PRF-13830B) |
Flatness | <λ/8@633nm |
Transmitted Wavefront Distortion | <λ/8@633nm |
Anti-Reflection Coating | According to customer requirements |
CHEMICAL AND STRUCTURAL PROPERTIES | |||
Crystal Structure | Orthorhombic, Space group Pna21, Point group mm2 | ||
Lattice Parameter | a=12.81Å, b=6.404Å, c=10.616Å | ||
Melting Poin | About 1172℃ | ||
Mohs Hardness | 5 | ||
Density | 3.01g/cm3 | ||
Thermal Conductivity | 13W/mK | ||
Thermal Expansion Coefficients | ax=11×10-6/℃, ay=9×10-6/0C, az=0.6×10-6/℃ | ||
OPTICAL AND NONLINEAR OPTICAL PROPERTIES | |||
Transparency Range | 350~4500nm | ||
SHG Phase Matchable Range | 497~1800nm (Type II) | ||
Therm-optic Coefficient ( λ in μm) | dnx/dT=1.1×10-5 | ||
dny/dT=1.3×10-5 | |||
dnz/dT=1.6×10-5 | |||
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℃·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=5pm/V d15=6.1 pm/V | |||
d33=13.7 pm/V | |||
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 | |||