  We report fabrication of a multifunctional photonic integrated chip on
lithium niobate on insulate (LNOI), which is achieved by femtosecond laser
assisted chemo-mechanical polish. We demonstrate a high extinction ratio beam
splitter, a 1 * 6 optical switch, and a balanced 3 * 3 interferometer on the
fabricated chip by reconfiguring the microelectrode array integrated with the
multifunctional photonic circuit.
