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[China]
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Nanjing Crylink Photonics Co.,Ltd |
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LiNbO3 Piezoelectric Crystals
Description
Lithium niobate (LN, LiNbO3) crystals are an important material for
optical waveguides, mobile phones, piezoelectric sensors, optical
modulators and various other linear and non-linear optical
applications. Many technologies are based on this material which
has unique piezo-electric, optical and photoelastic properties
while exhibiting mechanical and chemical stability.The combination
of excellent electro-optical, acousto-optical and non linear
optical properties make an attractive host material for application
in integrated optics.
Lithium niobate–(LN, LiNbO3) crystals are an important material for optical waveguides, mobile phones, piezoe- lectric sensors, optical modulators and various other linear and non-linear optical applications. Many technologies are based on this material which has unique piezo-electric.
Optical Grade
Available up to 6" diameter, single crystal optical grade material
has been developed as a next generation material. Reduced impurity
levels and development of high damage threshold material through
Magnesium doping, has resulted in sub-grain boundary free wafers.
The main applications are in optical modulation, wavelength
conversion for SHG lasers, PPLN and more.
Saw Applications
The most commonly used orientations are YZ-cut and 128°-cut most
suitable for applications in television transmission and reception
signal processing.
With the increased interest in high frequency telecommunications
signal processing for EGSM, AMPS, 3G, Bluetooth and 802.11b, there
has emerged a significant interest in rotated cuts where the
velocity of the acoustic wave is high. Accordingly 171° and 106°
doubly rotated wafers have shown an increased demand.
| Crystal structure | trigonal |
| Space group | R3C |
| Density | 4.64 g/cm3 |
| Optical homogeneity | ~ 5 x 10-5 / cm |
| Transparency range | 420 - 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 | |
| Sellmeier equations (λ, μm) | no2 = 4.9048 + 0.11768 / (λ2 - 0.04750) - 0.027169λ2 |
| ne2 = 4.5820 + 0.099169 / (λ2 - 0.04443) - 0.021950λ2 | |
| Thermal expansion coefficient@ 25 °C | //a, 2.0 x 10-6 / K |
| //c, 16.7 x 10-6 / K | |
| Thermal conductivity | ~ 5 W/m/K @ 25 °C |
| Thermal optical coefficient | dno/dT = -0.874 x 10-6 / K at 1.4 μm |
| dne/dT = 39.073 x 10-6 / K at 1.4 μm |
