LiNbO3
アイソレータ、サーキューレータ用結晶
LiNbO3 crystal combines low cost, good mechanical and physical properties as well as high optical homogeneity.
Therefore, LiNbO3 wedges have been widely used in fiber Isolators and Circulators.
CASTECH provides
- 50,000 to 100,000 pcs/month of LiNbO3 wedges used for fiber optical isolators and circulators
- Reliable Delivery;
- Strict quality control;
- Technical support;
- Very competitive price
Basic Properties of LiNbO3
| Crystal Structure | Trigonal, Space group R3c, Point group 3 m |
|---|---|
| Melting Point | 1253 ℃ |
| Mohs Hardness | 5 |
| Density | 4.64 g/cm3 |
| Deliquescence | None |
| Optical Homogeneity | ～5x10-5/cm |
| Transparency Range | 420 nm-5200 nm |
| Absorption Coefficient | ～0.1 %/cm @1064 nm |
| Refractive indices at 1064 nm | ne = 2.146, no = 2.220 @ 1300 nm ne = 2.156, no = 2.232 @ 1064 nm ne = 2,203, no = 2.286 @ 632.8 nm |
| Thermal Expansion Coefficients ( at 25℃) | //a, 2.0x10-6/K //c, 2.2x10-6/K |
| Thermal Conductivity Coefficient | 38 W/m/K at 25 ℃ |
| Thermal Optical Coefficient | dno/dT=-0.874x10-6/K at 1.4 µm dne/dT=39.073x10-6/K at 1.4 µm |
| The Sellmeier equations (λ in µm) | no 2 = 4.9048 + 0.11768/(λ2-0.04750) -0.027169λ2 ne 2 = 4.5820 + 0.099169/(λ2-0.04443) -0.02195λ2 |
Specifications of LiNbO3 wedges
| Aperture | 1.0 × 1.0 mm2 to 4 × 4 mm2 |
|---|---|
| Dimension tolerance | ±0.05 mm |
| Wedge Angle tolerance | ±0.1 ° |
| Optical axis orientation | ±0.5 ° |
| Flatness | λ/4 @ 632.8 nm |
| Surface Quality | 20 - 10 |
| AR-coating | R<0.2% @1550 nm ±40 nm |
| Standard Size | 1.25 mm x 1.25 mm x 0.5 mm with 13° or 15° wedge, phi=22.5° |
技術資料
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