Dopped Lithium Niobate Crystal
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Dopped Lithium Niobate Crystal

Lithium oxide crystal (IN) is an excellent ferroelectric crystal, and electro-optic crystal and nonlinear optical crystal. Pure LN has the disadvantages of being susceptible to light damage and low recording sensitivity when used as a total recording material. For this, people use doping methods to change or improve the performance of LN. 
Mainly doped transition elements, such as Fe, Zn, Mn, Cr and rare elements, such as Tm, Er, Eu, Nd, etc., Mg are also often used as dopants.
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Product Description

Crystal Physical Parameters:



Crystal Structure

Trigonal, point group 3m

Lattice Parameters

a=5.148Å, c=13.863Å

Density

4.64 g/cm3

Melting Point

1250 °C

Curie Point

1142±2℃

Mohs Hardness

5

Dielectric Constante11/e0 = 85; e33/e0 = 29.5
Thermal Conductivity

38 W/m/°C at 25°C

Thermal Expansion Coefficient

a1=a2 =2x10-6/°C, a3=2.2x10-6/ °C at 25°C

Elastic Stiffness Constant

CE11 = 2.04 x 1011 N/m2, CE33 = 2.46 x 1011 N/m2


Applications:


surface acoustic wave filters, isolators, narrowband filters, sensors, photonic tunable filters, acousto-optic devices, optical gyroscopes, optical waveguides, optical switches, optical modulation directional couplers, optical communication modulators, interferometers gyrators, high-speed long-distance communication devices and frequency multipliers, etc.


Innovation:


Through the transformation of the growth equipment, the self-created simulated crystal growth system (CSCGS) can design the crystal shape according to the needs, and the microcomputer chip controls the crystal shape change according to the crystal growth state and the processing of the precise sensor signal. A set of gradient composite temperature field structure (GCT) is independently designed, so that the temperature gradient in the crystal, in the melt and on the solid-liquid interface reaches the excellent state of growing optical crystals, which greatly improves the optical uniformity of LN


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