KTP crystal is the most commonly used for SHG(Frequency doubling) of Nd-doped laser for green/red output. It is widely used in both commercial and military lasers including laboratory and medical systems, range-finders, lidar, optical communication and industrial systems.
Advantages:
1. Large nonlinear optical coefficient
2. High electro-optic coefficient and low dielectric constant
3. High thermal conductivity
4. Moisture free, chemically and mechanically stable
5. Large figure of merit
6. High electro-optic coefficient and low dielectric constant
Applications:
1. Second harmonic generator of radiation 1.064 μm
2. Optical parametric oscilator in near IR region up to 4 μm
3. Different frequency generator in near IR region
4. E-O Modulators, Optical Switches, Directional Couplers
| Orthorhombic, space group Pna21,point group mm2 | |
| Cell parameters | a=6.404Å, b=10.616Å, c=12.814Å, Z=8 |
| Melting point | 1172ã¡C incongruent |
| Curie point | 936°C |
| Mohs hardness | ~5 |
| Density | 3.01 g/cm3 |
| Color | colorless |
| Hygroscopic susceptibility | no |
| Specific heat | 0.1643 cal/g°C |
| Thermal conductivity | 0.13 W/cm/°K |
| Electrical conductivity | 3.5x10-8 s/cm (c-axis, 22°C, 1KHz) |
| Dimension Tolerance | W(+/-0.1) x H(+/-0.1) x L(+0.5/-0.1)mm |
| Angle Tolerance | +/-0.25° |
| Perpendicularity | ≤10′ |
| Scratch/Dig | 20/10 |
| Chamfer | ≤0.2mmx45° |
| Parallelism | ≤10″ |
| Chips | ≤0.1mm |
| Flatness | λ/10@633nm |
| Clear Aperture | ≥90% |
| Wavefront distortion | λ/8@633nm |
| Coatings | AR@1064(R<0.2%)&532(R<0.5%) HR@1064(R>99.8%)&HT@532(T>95%) |
| Damage Threshold | 500MW/cm2 (1064nm, 10ns, 1Hz) |
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