Catia Pinho, a Ph.D. candidate from the Instituto de Telecomunicações, Universidade de Aveiro (Portugal) has spent two weeks in the Universitat Politècnica de València (Spain), working under the supervision of Prof. Pascual Muñoz in Photonic Integrated Circuits, Photonics Research Labs. During her STSM she worked on the design structure optimization of photonic integrated circuits (PIC) for silicon nitride technologies (to continue/conclude the work started in the first STSM). Furthermore, current/future collaboration(s) between the two research groups were also strengthened.