**About the Editors**

**Maria de Fatima Domingues** (Dr.), received her MSc in Applied Physics in 2008, and in 2014 she finished her PhD in Physics Engineering, both at the University of Aveiro, Portugal. In 2015, Dr. Domingues started a Research Fellow position at the Instituto de Telecomunicac¸oes—Aveiro and ˜ the Consejo Superior de Investigaciones Cient´ıficas (CSIC)-Madrid, Spain. At present, Dr. Domingues is a Researcher at Instituto de Telecomunicac¸oes—Aveiro, and her current research interests embrace ˜ new solutions of optical fibre based sensors and its application in e-Health scenarios, with a focus on physical rehabilitation architectures. Dr. Domingues has authored and co-authored more than 100 journal and conference papers, 5 book chapters and 3 books.

**N ´elia J. Alberto** (Dr.), received her PhD degree in Physics in 2011 at University of Aveiro, Portugal. During the 2012–2017 period, she worked under a FCT post-doctoral research fellowship, and in 2018, she was hired as Researcher by the Instituto de Telecomunicac¸oes—Aveiro (Portugal). ˜ She has acquired expertise in the design and development of optical fibre sensors, fibre coatings and application in different contexts, with a special focus on medical environments. Dr. Alberto is author/co-author of 6 book chapters, 50 papers in international peer-review journals, and more than 60 papers in conference proceedings. Since 2020, she has been dedicated to teaching activities at Physics Department of the Aveiro University (Portugal).

**Paulo Andr´e** (Prof.) was born in 1971. He received his bachelor's degree in physics engineering (1996), the Ph.D. degree in physics (2002), and the Agregac¸ao title (habilitation) from the Universidade ˜ de Aveiro, Portugal. Since 2019 he is full professor of the department of electrical and computer engineering at Instituto Superior Tecnico (IST), University of Lisbon and is senior researcher at ´ Instituto de Telecomunicac¸oes. His current research interests include the study and simulation ˜ of photonic and optoelectronic components, for sensing, communications and energy applications. Paulo Andre is a senior member of the Institute of Electrical and Electronics Engineers (IEEE). ´

## *Editorial* **Special Issue "Optical Fiber Interferometric Sensors: New Production Methodologies and Novel Applications"**

**M. Fátima Domingues 1,\*, Nélia Alberto 1 and Paulo André 2**


**Abstract:** The collection of papers presented in this Special Issue (SI) portraits the state-of-the-art of photonic-based interferometric sensors, where new application areas were explored (such as spirometry) and novel sensitivity limits were achieved, using innovative sensing techniques for the monitoring of parameters, such as displacement, temperature or salinity.

**Keywords:** interferometric sensors; optical fiber; photonics
