Sagnac loop all-optical logic device based on electro-optical modulation

The utility model discloses a Sagnac loop all-optical logic device based on electro-optical modulation. The Sagnac loop all-optical logic device based on electro-optical modulation comprises a signal source, a band-pass filter, a circulator, an electro-optical coupler, electrodes, a voltage source and a Sagnac interferometer, wherein signal light passes through the circulator and then is coupled and divided into two beams of light which are transmitted in opposite directions in the Sagnac interferometer, the clockwise light sequentially passes through the band-pass filter, the circulator, the electro-optical coupler, the circulator and the band-pass filter, the anticlockwise light sequentially passes through the band-pass filter, the circulator, the electro-optical coupler, the circulator and the band-pass filter, and the two beams of light are coupled again in the Sagnac interferometer and then output through the circulator. According to the Sagnac loop all-optical logic device based on electro-optical modulation, electro-optical effect is generated by means of electro-optical modulation. The Sagnac loop all-optical logic device based on electro-optical modulation has the advantages of being large in number of output logic value combinations, high is response speed, low in break over voltage and the like.