KTP (KTiOPO4) is an excellent non-linear crystal. It exhibits high optical quality, broad transparent range, relatively effective SHG coefficient (about 3 times higher than that of KDP), very high optical damage threshold, wide acceptance angle, small walk-off, and typeⅠand typeⅡnon-critical phase-matching (NCPM) in a wide wavelength range.
Frequency Doubling (SHG) of Nd-doped Lasers for Green/Red Output
Frequency Mixing (SFM) of Nd Laser and Diode Laser for Blue Output
Parametric Sources (OPG, OPA and OPO) for 600nm - 4500nm Tunable Ouptut
E-O Modulators, Optical Switches, Directional Couplers;
Optical Waveguides for Integrated NLO and E-O DevicesOPA and OPO.
Large nonlinear optical coefficient;
Wide angular bandwidth and small walk-off angle
Broad temperature and spectral bandwidth;
High Electro-Optics(E-O) coefficient and low dielectric constant;
Non-hygroscopic, chemically and mechanically stable
Tolerance of cutting angle | △θ≤±0.25°,△φ≤±0.25° |
Tolerance of dimension | Dimension+0/-0.1 mm，L：±0.1mm |
Flatness | λ/10 @ 632.8nm |
Wavefront distortion | λ/8@ 632.8nm |
Surface quality | 10/5 per MIL-O-13830A |
Parallelism | 20″ |
Perpendicularity | 5′ |
Clear Aperture: | > 90% |
Chamfer: | < 0.1 mm @ 45° |
Size | Upon customer request |
Coating | AR/HR coating upon customer’s request |
Damage Threshold | 750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz |
Quality Warranty Period | One year under proper use |
Transparency Range | 350~4500nm |
SHG Phase Matchable Range | 497 ~ 1800nm (Type II) |
Therm-optic Coefficient (/℃, λ in μm) | dnx/dT=1.1X10^-5 |
Absorption Coefficients | <0.1%/cm at 1064nm <1%/cm at 532nm |
Angle Acceptance | 14.2mrad·cm (φ);55.3mrad·cm (θ) for Type II SHG of a Nd:YAG laser at 1064nm |
Temperature Acceptance | 24°C·cm for Type II SHG of a Nd:YAG laser at 1064nm |
Spectral Acceptance | 0.56nm·cm for Type II SHG of a Nd:YAG laser at 1064nm |
Walk-off Angle | 0.55° for Type II SHG of a Nd:YAG laser at 1064nm |
NLO Coefficients | deff(II)≈(d24 - d15)sin2Φsin2θ - (d15sin2Φ + d24cos2Φ)sinθ |
Non-vanished NLO susceptibilities | d31=6.5 pm/V d24=7.6 pm/V |
Sellmeier Equations (λ in μm) | nx²=3.0065+0.03901/(λ²-0.04251)-0.01327λ² |
Electro-optic Coefficients: r13 r23 r33 r51 r42 | Low and High frequency (pm/V) 9.5 and 8.8 15.7and 13.8 36.3 and 35 7.3 and 6.9 9.3 and 8.8 |
Relative Dielectric Constant | εeff=13 |
Crystal Structure | Orthorhombic, space group Pna21,point group mm2 |
Lattice Parameter | a=6.404Å, b=10.616Å, c=12.814A, Z=8 |
Melting Point | About 1172°C |
Mohs Hardness | 5 |
Density | 3.01 g/cm3 |
Refractive indices | nX = 1,7404; nY = 1,7479; nZ = 1,8296 @1064 nm |
Thermal Conductivity | 13W/m/K |
Thermal Expansion Coefficients | ax=11x10^-6/℃, ay=9x10^-6/℃, az=0.6x10^-6/℃ |
