A novel phase integration surface plasmon sensor based on electro-optic modulation and harmonic analysis is presented.Compared traditional phase integration surface plasmon sensor,the proposed system uses single optical path,and completes the phase extraction and analysis by software in computer.Which can significantly simplify the system.By sharing the same optical path in P-polarization and S-polarization light,it can significantly suppress the phase noise.In addition,lower modulation voltage can be used ...