|Name:||Piezoelectric Crystals LiNbO3 Piezoelectric Crystals||Use:||Reception Signal Processing|
lithium niobate wafer,
yttrium calcium oxy borate
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.
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.
|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|