"The primary objective of the research efforts of the Photonic Devices and Modules Group is to investigate and develop novel material technology and enabling devices and modules for optical networks. During the four-year period 2000-2003, we have made significant progresses and achieved many important and useful results. This volume summarizes the major accomplishments of the research activities that have been performed by our group inthe Lee & MTI Center for Networking Research at NCTU. Detail description of the scientific achievements can also be found in this volume. "