Spatio-temporal and vectorial analysis of the electric field vector with an optical sensor

The ability of an electro-optic system is here demonstrated for the mapping of the electric field vector over a wide bandwidth. Thanks to their dielectric structure, such sensors are intrinsically very low invasive and allow to perform near field analysis. Even in the reactive area of radiative devices, the probe allows to characterize the field vector distribution with a dynamics exceeding 120 dB. The associated spatial resolution is weaker than 500 μm and the measurement bandwidth reaches more than 10 GHz.