High Temperature form BBO (a-BaB2O4) is a negative uniaxial crystal. Following exceptional properties make it a very important nonlinear crystal:
Advantage:
1. Broad phase-matching range from 410 nm to 3500 nm
2. Useful optical transmission from 190 nm to 3500 nm
3. High optical homogeneity with dn » 10-6/cm
4. Wide temperature-bandwidth of about 55°C
5. High damage threshold of 10 GW/cm2 for 100ps pulse-width at 1064nm
6. Low thermo-optic coefficient
Applictions:
1. Second, third, fourth and fifth harmonic generation of Nd doping lasers
2. Frequency double, tripling and mixing of dye and Ti :Sapphire lasersl
3. Optical parametric amplifier (OPA) and optical parametric oscillators (OPO)
4. Frequency double, tripling and mixing of Dye and Ti :Sapphire lasers
5. Frequency-doubling of Argon ion, Cu-vapor and Ruby lasers
6. Research and development for advanced laser techniques, including all-solid state wide-tunable lasers, ultrafast pulse lasers, and DUV lasers.
| Crystal Structure: | Trigonal, space group R3c |
| Lattics Parameters: | a=b=12.532Å, c=12.717Å, Z=6 |
| Melting Point | About 1095℃ |
| Mohs Hardness | 4 |
| Density | 3.85g/cm3 |
| Thermal Conductivity | 1.2W/m/K(┴c): 1.6W/m/K(//c) |
| Thermal Expansion Coefficients | a11=4x10-6/K; a33=36x10-6/K |
| 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 | ≤ 0.2mm x 45° |
| Parallelism | ≤10″ |
| Chips | ≤ 0.1mm |
| Flatness | λ/10@633nm |
| Clear Aperture | ≥ 90% |
| Wavefront distortion | λ/8@633nm |
| Coatings | AR/AR@532(R<0.2%)&266(R<0.5%) AR/AR@1064(R<0.2%)&532(R<0.5%)&355(R<0.5%) Pcoating/Pcoating |
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