Z-Cut X-Cut LiNbO3 Crystals Wafer Optical Grade Both Sides Polish
The sound velocity for the longitudinal waves in LiNbO3 propagating along the principal axes is for the Z-direction, 7.271*10^5 cm/s; for the Y-direction, 6.549*10^5 cm/s; and for the X-direction, 6.580*10^5 cm/s.32,43,44 Applying these values to the case of a 10*10*0.5 mm3 Y-cut LNO crystal, the thickness extensional mode should appear at 6.58 MHz. The closest observed peak is centered at a slightly lower frequency of 6.34 MHz, which may be explained as a consequence of the clamping effect of the Metglas foils. The calculated length extensional resonances along the X and Z directions (327.5 kHz and 363.5 kHz, respectively) can be attributed to the peaks observed at 314 kHz and 355 kHz.
Material | 4inch 6inch 8inch LiNbO3 LNC wafer |
Orientation | Z-cut or X-cut |
Surface finish | Double sides polish (DLP/SLP/ SSP/DSP all available ) |
Thickness | 0.35mm, 0.50mm, 1.00mm |
TTV | < 5µm |
BOW | ± 30um |
Warp | < 40µm |
Orientation flats | Semi Standard Notch |
Polished side Ra | Roughness Ra<5A |
Back Side Criteria | Roughness Ra:0.5-1.0µm GC#1000 |
Edge Rounding | Compliant with SEMI M1.2 Standard/refer to IEC62276 |
Crystal Sturucture | Trigonal, Space group R3c, Point group 3m |
Melting Point | 1253℃ |
Mohs Hardness | 5 |
Density | 4.64g/cm3 |
Deliquescence | None |
Optical Homogeneity | ~5x10-5/cm |
Transparency Range | 420-5200nm |
Absorption Coefficient | ~0.1%/cm @1064nm |
Refractive Indices @1064nm | ne=2.146, no=2.220@1300nm ne=2.156, no=2.232@1064nm ne=2.203, no=2.286@632.8nm |
Thermal Expansion Coefficients (at 25℃ ) | //a,2.0x10-6/K //a,2.2x10-6/K |
Thermal Conductivity Coefficients | 38 W/m/K at 25℃ |
Thermal Optical Coefficients | dno/dT=-0.874 x 10-6/K at 1.4μm dne/dT=39.073 x 10-6/K at 1.4μm |
The Sellmeier Equations (λ in μm) | no2=4.9048+0.11768/(λ2-0.04750)-0.027169λ2 ne2=4.5820+0.099169/(λ2-0.04443)-0.02195λ2 |
Acceptance Check