LiNbO3
LiNbO3
LiNbO3 crystal has low cost, good mechanical and physical properties as well as high optical homogeneity. It has been applied in fiber optics with the low price, stable quality.The same, LiNbO3 Crystal is widely used as frequency doublers for wavelength > 1mm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to its large Electro-Optic (E-O) and Acousto-Optic (A-O) coefficients, LiNbO3 crystal is the most commonly used material for Pockel Cells, Q-switches and phase modulators, waveguide substrate, and surface acoustic wave (SAW) wafers, etc.
The large quantity LiNbO3 wedges and compensators for OEM customers are available from Newphotons.
Basic Properties of LiNbO3:
| Crystal Structure: | Trigonal, Space group R3C, Point group 3m |
| Cell Parameters: | a=5.148Å , c=13.863Å |
| Melting Point: | 1253° C |
| Curie Temperature: | 1140° C |
| Mohs Hardness: | 5 |
| Density: | 4.64 g/cm3 |
| Deliquescence | None |
| Optical Homogeneity | ~ 5x10-5/cm |
| Transparency Range | 420nm-5200nm |
| Absorption Coefficient: | ~0.1%/cm @ 1064nm |
| Refractive indices at 1064nm: | 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 250C) | //a, 2.0x10-6/K |
| //c, 16.7x10-6/K | |
| Thermal Conductivity Coefficient: | 38 W/m/K at 250C |
| Thermal Optical Coefficient: | dno/dT=-0.874x10-6/K at 1.4m m dne/dT=39.073x10-6/K at 1.4m m |
| The Sellmeier equations ( l in m m) | no2 = 4.9048 + 0.11768/(l 2-0.04750) - 0.027169l 2 ne2 = 4.5820 + 0.099169/(l 2l 2 |
Specifications:
1. Standard Spec. of Birefringent wedges
1. Standard Spec. of Birefringent wedges
Material | Laser grade LiNbO3 |
Standard Dimensions | 1.25x1.25x0.5mm,1x1x0.45mm3, |
Wedge Angle tolerance | ±0.1° |
Scattering Sites | invisible, probed with a He-Ne laser |
Orientation | ±0.5deg. |
Dimensional Tolerance | ±0.05mm |
Surface quality | 20/10 Scratch/Dig per MIL-O-13830B |
Flatness | l/4 at 633 nm |
Clear Aperture | > Central 90% |
AR Coating | 1310nm or 1550nm ±30nm |
Standard Wedge | 12°,13° or 15° |
2. Standard Spec. of laser application:
Transmitted wavefront distortion | better than l/4 @ 633nm |
Dimension tolerance | (W±0.1mm) x (H±0.1mm) x (L±0.2mm) |
Clear aperture | over 90% central diameter |
Flatness | l/8 @ 633nm |
Surface quality | 20 /10 Scratch/Dig |
Parallelism | better than 20 arc sec |
Perpendicularity | 5 arc min |
Angle tolerance | Dq < 0.5o, Df < 0.5o |
AR-coating | dual wave band AR coating at 1064/532 nm on both surfaces, with R < 0.2% at 1064 nm and R < 0.5% at 0.532 nm per surface |
Standard Products
Part No. | Application | Dimension9(mm3) | Coating |
LNB0101 | SHG or OPO | 5x5x20 | AR Coating |
LNB0102 | SHG or OPO | 8x8x20 | AR Coating |
LNB0103 | SHG or OPO | 9x9x25 | AR Coating |
LNB0104 | SHG or OPO | 10x10x25 | AR Coating |