Lithium niobate crystal is an important multifunctional crystal with good nonlinear optical properties, large nonlinear optical coefficient, and non-critical phase matching. As an electro-optic crystal, it has been used as an important optical waveguide material; as a piezoelectric crystal, it can be applied to fabricating medium-low frequency SAW filters, high-power, high-temperature-resistant ultrasonic transducers, and the like. The use of doped lithium niobate materials is also quite extensive. Mg:LN can greatly improve the laser damage threshold and promote the application of lithium niobate crystal in the field of nonlinear optics; Nd:Mg:LN crystal can realize self-doubling effect; Fe:LN crystal can be used in optical volume holographic storage .
LiNbO3 Crystals is widely used as frequency doublers for wavelength > 1um and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Due to its large Elector-Optic (EO) and Acousto-Optic (AO) 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.
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