It is employed in the manufacture of optical waveguides and surface acoustic wave devices, Lithium niobate (CAS NO.12031-63-9) is used extensively in the telecoms market, e.g. in mobile telephones and optical modulators. It can also find its uses in laser frequency doubling, nonlinear optics, Pockels cells, optical parametric oscillators, Q-switching devices for lasers, other acousto-optic devices, optical switches for gigahertz frequencies.