An Integrated Interferometric Sensor for Electromagnetic Field

We propose in this chapter an integrated optical electromagnetic field sensor suitable for sensing in the Fresnel region over a wide frequency range. This device, based on a coherent symmetric interferometer implemented on LiNbO3 substrate, yields minimal coupling with critical radiating structures and enables their near-field monitoring. The principle and technologies of this optical sensor are described and applications of more complex platforms based on the optical device are discussed.