PENED 2003 is a funding program for young researchers, supported by the General Secretariat for Research and Technology, Greece, under the operational program "Competitiveness". PENED 2003 focuses on training young researchers through the elaboration of PhD Theses over the course of a three-year period. Within the framework of this project, new laser devices mainly based on microring resonators active elements will be investigated in terms of their tunability performance.