Abstract
We propose a new type of optical probe designed to detect magnetic near-fields with high accuracy up to the gigahertz range. The probe consists of a loop antenna element and a bulk electro-optic crystal. It requires no metallic cable or balun. We examined probe characteristics for magnetic field detection up to 10 GHz. We confirmed that the probe can measure a magnetic field distribution near a microstrip line with high accuracy in gigahertz range.
