Walter Margulis’ present lines of research at RISE Acreo and the Royal Institute of Technology (KTH) in Sweden are: Fabrication, characterization and applications of fiber components and in particular electrically controlled fiber devices and poling of glass systems. Other main lines include the design and fabrication of specialty fibers for active functions, distributed fiber sensors, photosensitivity, and optofluidics for nonlinear optics and life-sciences.