Lithium Niobate wafer for optical Low-pass filter and Isolator applictions |
LN has a characteristic of large birefringence. Birefringence is the difference between the normal ray refractive index and extraordinary ray refractive index.Since LN has a birefringence of 10 times greater than quartz and allows a low-pass filter to be thinly built, it is used in top class Digital S.L.R.(single-lens refles) Cameras. LN wedge chips usally areUsed for optical polarizer inside isolator,Insteading of YVO4 beacause its lower cost. |
Specification for LithiumNiobate wafer | |
Orientation | X-cut±0.20 |
Diameter | 76.2mm±0.3mm |
Orientation Flat (OF) Length | 22mm±2mm perpendicular toZ±0.20 |
Second Refer. Flat (RF) Length | 10mm±3mm CW1350±0.50from OF |
Thickness | 500um-3000um±5um |
Surface Finish | Double sides polished, S/D20/10 |
TTV | ≤10um |
WARP | ≤50um |
Index of refraction | No=2.2878±0.0001 Ne=2.2028±0.0001 prism coupler method @632.8nm, |
Edge | Rounded by beveling |
optical low pass filter LiNbO3 wafer