Patent ID: 8532443

Claim:
An integrated optical fiber gyroscope chip based on surface plasmon polariton (SSP) waveguide, wherein, it integrates the following components in sequence from the input end to output end: an input waveguide ( 1 ), a third output waveguide ( 7 ), a directional coupler ( 2 ), a symmetrical triple-waveguides beam splitter ( 3 ), a first output waveguide ( 61 ), and a second output waveguide ( 62 ), the components have the following position relation: the two ends of an upper branch waveguide of the directional coupler ( 2 ) are connected with the input waveguide ( 1 ) and the input end of a middle branch waveguide ( 32 ) of the symmetrical triple-waveguides beam splitter ( 3 ) respectively, the two ends of a lower branch waveguide of the directional coupler ( 2 ) are connected with the third output waveguide ( 7 ) and a third metal nanowire ( 83 ) respectively, the two ends of an upper branch waveguide ( 31 ) of the symmetrical triple-waveguides beam splitter ( 3 ) are connected with a first metal nanowire ( 81 ) and the first output waveguide ( 61 ) respectively, the two ends of a lower branch waveguide ( 33 ) of the beam splitter are connected with a second metal nanowire ( 82 ) and the second output waveguide ( 62 ) respectively, a first modulation electrode ( 41 ), a second modulation electrode ( 42 ), a first metal wire gap ( 51 ), and a second metal wire gap ( 52 ) are prepared on the coupling end of the upper branch waveguide ( 31 ) of the beam splitter, a third modulation electrode ( 43 ), a fourth modulation electrode ( 44 ), a third metal wire gap ( 53 ), and a fourth metal wire gap ( 54 ) are prepared on the output end of the lower branch waveguide ( 33 ) of the beam splitter; wherein, the input waveguide ( 1 ), first output waveguide ( 61 ), second output waveguide ( 62 ), and third output waveguide ( 7 ) are polymer optical waveguides, the directional coupler ( 2 ) and symmetrical triple-waveguide beam splitter ( 3 ) are prepared from SPP waveguide, and the input waveguide ( 1 ), first output waveguide ( 61 ), second output waveguide ( 62 ), third output waveguide ( 7 ), directional coupler ( 2 ), and symmetrical triple-waveguide beam splitter ( 3 ) are prepared on the same substrate ( 9 ).