Noncontact electro-optic near field probe for surface electric field profiling

摘要

An integrated electro-optic electric field sensor probe for measurement of near-surface electric fields from 20 mV/m to 30 kV/m, and from low audio to VHF frequencies was demonstrated. The sensor has a single-fiber geometry to enable measurements with high spatial resolution in the near field. One dimensional electric field profile measurements were performed with millimeter spatial resolution. The dynamic range of the sensor system exceeded 100 dB in a 1 Hz bandwidth, with a minimum detectable field of 20 mV/m/root-Hz at 100 MHz, and a 1 dB compression field greater than 30 kV/m.