This book presents a comprehensive selection of peer-reviewed papers from the International Conference on Applied Photonics and Electronics (InCAPE 2025), held on 6 October in Penang, Malaysia. This book highlights current research trends, innovative solutions, and practical challenges in the evolving fields of photonics and electronics in four key thematic tracks. The Photonics Materials & Optical Communication track focuses on developments in photonic devices, fiber optics, optical signal processing, and materials for light-based technologies. The Electronic Materials & Devices track addresses the development, characterization, and application of novel materials in electronic systems. The Analog & Digital Electronic Systems track explores circuit design, signal processing, embedded systems, FPGA/ASIC implementation, and emerging computing paradigms. The final section, Engineering & Technology Education, highlights current research trends, innovative solutions, and practical challenges in the evolving fields of applied photonics and electronics, providing relevant and up-to-date insights. This book serves as a valuable reference for academic researchers and graduate students, industry professionals and engineers, educators and curriculum developers, and policy makers and innovation strategists. Whether used in research, teaching, or product development, this book provides a timely and authoritative overview of applied photonics and electronics, reflecting the dynamic and interdisciplinary nature of these rapidly advancing fields.