Patent ID: 8655115

Claim:
A polymer optical waveguide current sensor, comprising: an optical coupler to which light generated from a light source is input; an optical waveguide polarizer allowing the light emitted from the optical coupler to have a single polarized state; a phase modulator modulating a phase of the light emitted from the optical waveguide polarizer; a linear polarization converter converting the polarization of the light passed from the optical waveguide polarizer and transferring the light to the phase modulator; a current sensing optical fiber coil, through which the light passed from the phase modulator passes while undergoing a change in phase under an effect of a magnetic field generated by current applied to an electric wire provided at the center of the optical fiber coil; and a photo-detector in which the light emitted from the current sensing optical fiber coil reflects on a reflection mirror to detect returned light, wherein the optical coupler, the optical waveguide polarizer, the phase modulator and the linear polarization converter are integrated totally on a single chip.