Measurement of Electric Near Field Distribution by Optical Electric Field probe

Recently through technique development of communication and information devices, the frequency used has come to extend into the gigahertz range. Especially, smaller probes of broadband with high-resolution are requested in the EMC field to measure and analyze devices. An optical electric field probe may present an accurate method for near-field measurement in the gigahertz range. In the present work, various characteristics of the optical electric field probe are evaluated and near-field electric field distributions on a micro-strip line (MSL) are measured using both the probe and a conventional coaxial monopole antenna. Compared with results for an optical probe, the monopole antenna is used with identical measuring conditions. Simulation results agree well with measured results.