Fig. 1. Configuration diagram of optical-fiber high current sensor

Fig. 2. Variation of normalized scale factor of the senor with measured current for different pigtail polarization crosstalk of phase modulator

Fig. 3. Variation of normalized scale factor of the senor with measured current for different parameters of retarder

Fig. 4. Variation of normalized scale factor of the senor with measured current for different pitches of sensing fiber

Fig. 5. Effect of bending radius of the sensing fiber coil on the nonlinear error compensation results

Fig. 6. Calibration device and test results for fiber-optic high current sensor. (a) Calibration device; (b) error test results

Fig. 7. Influence of parameter errors of quarter-wave retarder on nonlinear error compensation effect