Method and reconfigurable device for the guidance of an optical signal with two perpendicular polarizations. The present invention relates to a method and a reconfigurable device for guiding an optical signal with two perpendicular polarizations comprising: an input means for guiding the optical signal; means of exit; a birefringent element, disposed between the input means and the output means, which determines a first optical path for each of the two perpendicular polarizations, wherein said birefringent element is switchable between two alignment states; an electromagnetic field source applicable to the birefringent element, capable of switching the state of alignment of the birefringent element and determining a second optical path for each of the two perpendicular polarizations of the optical signal in the output means. (Machine-translation by Google Translate, not legally binding)