| Applications | ◆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 0.6mm-4.5mm Tunable Output | ||||
| ◆Electrical Optical(E-O) Modulators, Optical Switches, and Directional Couplers | ||||
| ◆Electrical Optical(E-O) Modulators, Optical Switches, and Directional Couplers | ||||
| ◆Optical Waveguides for Integrated NLO and E-O Devices | ||||
| Features | ◇Efficient frequency conversion(1064nm SHG conversion efficiency is about 80%) | |||
| ◇Large nonlinear optical coefficients(1.5 times that of KDP) | ||||
| ◇Wide angular bandwidth and small walk-off angle | ||||
| ◇Broad temperature and spectral bandwidth | ||||
| ◇High thermal conductivity (2 times that of BNN crystal ) | ||||
| ◇Moisture free | ||||
| ◇Super-polished optical surface | ||||
| ◇No decomposition below 900°C | ||||
| ◇Low cost compare with BBO and LBO | ||||
| ◇Gray-tracking at high power limited it's application to moderate power density | ||||
| Main Specification | Material | KTiOPO4 | ||
| Orientation accuracy of cut angle | <30 arc min | |||
| Phase matching type | Type II, θ=90°; φ=phase-matching angle | |||
| Phase matching range | 497nm – 3300 nm | |||
| Coating | a) S1 & S2: AR @1064nm R<0.1%; AR @ 532nm, R<0.25%. | |||
| b) S1: HR @1064nm, R>99.8%; HT @808nm, T>5% | ||||
| S2: AR @1064nm, R<0.1%; AR @532nm, R<0.25% | ||||
| Customized coating available upon customer request. | ||||
| Angle tolerance | △θ≤0.25°, △ф≤0.25° | |||
| Dimension tolerance | (Width±0.1mm)×(Height±0.1mm)×(Length+0.5/-0.1mm) for Length≥2.5mm | |||
| (Width±0.1mm)×(Height±0.1mm)×(Length+0.1/-0.1mm) for Length<2.5mm | ||||
| Flatness | <λ/8 @ 633nm | |||
| Surface quality | 10/5 Scratch/dig per MIL-O-13830A | |||
| Parallelism | <10 arc sec | |||
| Perpendicularity | ≤5 arc min | |||
| Wavefront distortion | < λ/8 @ 633nm | |||
| Clear aperture | 90% central area | |||
| Working temperature | 25°C - 80°C | |||
| Physical Properties | Crystal Structure | Orthorhombic Point group: mm2 | ||
| Lattice Parameters | a=6.404Å, b=10.615Å, c=12.814Å, Z=8 | |||
| Melting Point | About 1172°C | |||
| Transition Temperature | 936°C | |||
| Temperature of decomposition | ~1150°C | |||
| Optical Homogeneity | dn ~10-6/cm | |||
| Hardness | ~5 | |||
| Density | 3.01 g/cm3 | |||
| Specific heat | 0.1737 cal/g.°C | |||
| Absorption Coefficient | a < 1%/cm @1064nm and 532nm | |||
| Hygroscopic Susceptibility | No | |||
| Dielectric constant | eeff = 13 | |||
| Thermal Expansion Coefficients | a1 = 11 x 10-6 °C-1 | |||
| (in the range of 25°C- 900°C) | a2 = 9 x 10-6 °C-1 | |||
| a3 = 0.6 x 10-6 °C-1 | ||||
| Thermal Conductivity | 0.13 W/cm/°C | |||
| Thermal conductivity coefficients | k1 = 2.0 x 10-2 W/cm °C | |||
| k2 = 3.0 x 10-2 W/cm °C | ||||
| k3 = 3.3 x 10-2 W/cm °C | ||||
| Electrical conductivity | 3.5x10-8 s/cm (c-axis, 22°C, 1KHz) | |||
| Linear Optical Properties | Transparency Range | 350nm ~ 4500nm | ||
| Refractive Indices | ||||
| Therm-Optic Coefficients | dnx/dT=1.1x10-5/°C | |||
| dny/dT=1.3x10-5/°C | ||||
| dnz/dT=1.6x10-5/°C | ||||
| Sellmeier Equations | nx2=3.0065+0.03901/(l 2-0.04251)-0.01327l 2 | |||
| ny2=3.0333+0.04154/(l 2-0.04547)-0.01408l 2 | ||||
| nz2=3.3134+0.05694/(l 2-0.05658)-0.01682l 2 | ||||
| (λ in μm) | ||||
| Nonlinear Optical Properties | Phase-matchable SHG range | 497 ~ 1800nm (Type II) | ||
| For Type II SHG of a Nd:YAG laser at 1064nm | ||||
| NLO coefficients | d31=2.54pm/V, d31=4.35pm/V, d31=16.9pm/V | |||
| d24=3.64pm/V, d15=1.91pm/V at 1.064 mm | ||||
| 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 | ||||
| Effective nonlinear optical coefficients | deff(II)≈ (d24 - d15)sin2qsin2j - (d15sin2j + d24cos2j)sinq | |||
| Electro-Optic Coefficients | ||||
| Damage Threshold | >0.5 GW/cm2 for 10 ns pulses @ 1064 nm | |||
| Notice | ★Engineers can select and design the best solution for you, if the main parameters of your laser are provided, such as energy per pulse, pulse width and repetition rate for a pulsed laser, power for a cw laser, laser beam diameter, mode condition, divergence, wavelength tuning range, etc. | |||
