This book explores the integration of smart materials with optical fiber technology to develop advanced sensing systems for real-time, high-precision applications. Functionalized optical fiber sensors (FOFS) leverage tailored coatings, nanostructures, and responsive materials to investigate a wide range of physical, chemical, and biological parameters with remarkable sensitivity and reliability. The book provides a comprehensive overview of the design principles, functionalization techniques, and fabrication methods that underpin FOFS technology. It focuses into emerging materials—including nanomaterials, graphene, and polymers—that enhance the performance and selectivity of these sensors. Key applications discussed include refractive index sensing, ph sensing, temperature sensing, structural health monitoring, biomedical diagnostics, environmental surveillance, industrial automation, and energy systems. Emphasis is placed on the multidisciplinary nature of FOFS, highlighting how advances in photonics, material science, and data analytics converge to support intelligent sensing solutions. The book also addresses challenges in scalability, durability, and integration with wireless and AI-based platforms. It serves as both a foundational reference and a guide to emerging trends in functionalized fiber optic sensing. It is particularly relevant in the context of Industry 5.0, where adaptive, networked, and sustainable technologies are at the forefront of innovation.

Dr. Vanita Bhardwaj is an assistant professor at Vivekananda Institute of Professional Studies. She earned her Ph.D. from IIT ISM Dhanbad. Her research focuses on developing innovative optical fiber sensors using interferometer principles, including the development of optical fiber sensors encompassing pH sensing, refractive index detection, and temperature measurement. Her multidisciplinary approach explores novel applications in fields such as environmental monitoring. 

Dr. Sonal Khurana is currently working as the assistant professor in School of Engineering & Technology, Vivekananda Institute of Professional Studies-Technical Campus. Her research interests are in sustainable innovation, sustainable supply chain, operations management, circular economy, and six sigma at PG level. She has her papers published in reputed SCI journals like the Journal of Cleaner Production, Resources Policy, and Sustainable Development.

Dr. Rekha Bhardwaj is currently an assistant professor at Bharati Vidyapeeth’s College of Engineering in Paschim Vihar, New Delhi, India. She obtained her Ph.D. from Delhi University, where she focused on the fascinating field of nano and microparticles for energy storage devices. Her current research interests focus on the development and optimization of nano and microparticles to enhance the efficiency and capacity of energy storage devices. Her passion for innovation and her dedication to teaching and research continue to inspire her colleagues and students alike.