Liquid crystal-based electro-optical device forming, in particular, a switch

An electro-optical device, comprising two plane optical substrates (100, 400) each having at least one optical waveguide (110, 410), and a nematic liquid crystal (200) inserted between them, in which the liquid crystal (200) is split into two separate active zones (210, 220) serving to control coupling and decoupling of a respective one of the TE and TM polarizations of a light signal injected into the waveguides (110, 410) wherein a first waveguide provided in one of the two substrates defines an inlet port and an outlet port and a second waveguide provided in the other of the two substrates defines at least one outlet port, so that a signal injected in the inlet port of the first waveguide outputs by the outlet port of one of the first waveguide and the second waveguide.