A new method controls polarization inside laser-written waveguides by embedding a liquid crystal layer. The hybrid devices enable electro-optical control of polarization, enabling the integration of new types of optical functions into the whole volume of a single glass chip for compact 3D photonic integrated devices. The Friedrich Schiller University Jena team successfully demonstrated full modulation of optical polarization at two different visible wavelengths. Find the full article in our newsroom, link in bio! #OPG_OMEx #Polarization #Lasers #Chips