| Clear Aperture | central 90% of the diameter | Flatness | less than λ/8 @ 633nm |
| Transmitting Wavefront Distortion | less than λ/8 @ 633nm | Chamfer | ≤0.2mmx45° |
| Chip | ≤0.1mm | Surface Quality | 10/ 5 S/D to MIL-PRF-13830B |
| Parallelism | better than 20 arc seconds | Perpendicularity | ≤5 arc minutes |
| Angle Tolerance | Δθ≤0.25°, ΔΦ≤0.25° | Quality Warranty Period | one year under proper use |
Chemical and Structure Properties:
| Crystal Structure | Monoclinic, Point group 2 | Lattice Parameter | a=7.116Å,b=4.993Å, c=6.508Å, β=105.62° ,Z=2 |
| Melting Point | 726°C | Mohs Hardness | 5-5.5 |
| Density | 5.033 g/cm3 | Thermal Expansion Coefficient | αa=4.8x10-5 /K, αb=4.4x10-6 /K, αc=-2.69x10-5 /K |
Optical and Nonlinear Optical Properties:
| Transparency Range | 286-2500nm | Absorption Coefficient | <0.1%/cm at 1064nm |
| Physical Axis | X//b,(Z,a)=31.6°,(Y,c)=47.2° | SHG of 1064/532 | Phase matching angle:168.9° from z axis in YZ plane Deff:3.0+/-0.1 pm/V Angular acceptance:2.32 arad-cm Walk-off angle :25.6 mrad temperature acceptance:2.17°C-cm |
| Sellmeier Coefficients | ni2(λ)=A+B / (λ2-C)-Dλ2 (λ in um) | |||
| A | B | C | D | |
| n1 | 3.6545(4) | 0.0511(2) | 0.0371(3) | 0.0226(1) |
| n2 | 3.0740(3) | 0.0323(1) | 0.0316(3) | 0.01337(6) |
| n3 | 3.1685(3) | 0.0373(1) | 0.0346(3) | 0.01750(8) |
| SHG and THG for middle and high power1064 nm Nd: lasers |
| SHG and THG for high power Nd: lasers at 1342 &1319 nm for red and blue laser |
| Over 2.8 W CW blue laser at 473 nm was obtained from frequency doubling of 4.6 W CW Nd: YAG at 946 nm with BiBO |
| Optical Parametric Amplifiers (OPA) and Oscillators (OPO) |
| Crystals | Length (mm) |
Deff (pm/V) |
Walk-off (mrad) |
Output Power(W) | Conversion Efficiency |
| BiBO | 10.4 | 3.3 | 40.7 | 2.8 | 63% |
| LBO | 10 | 0.81 | 11.3 | 1.52 | 33% |
| BBO | 8 | 2.0 | 60.3 | 2.1 | 47% |
WDQ Optics can provide the perfect polishing surface and do the coating according to the customer's requirements.
| Aperture: | 2x2 ~ 25x25mm |
| Length: | 0.1 - 20mm |
| Cutting Angle q and f: | Determined by different kinds of harmonic generation |
| Phase matching type: | Type I or Type II |
| End Configuration: | Plano/Plano or Brewster/Brewster or Specified |
| Dimension | Application | Coating | Type |
| 3x3x5mm | SHG or THG | AR coating | I |
| 3x3x7mm | SHG or THG | AR coating | I |
| 3x3x10mm | SHG or THG | AR coating | I |
| 4x4x10mm | SHG or THG | AR-coating | I |
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