讲座预告|瑞士洛桑联邦理工学院Luc Thévenaz教授、智利圣玛利亚理工大学Marcelo A. Soto助理教授学术讲座
学术讲座
Academic Lectures
报告题目：Exploring New Horizons in Optical Fibre Sensing Based on Gas Interactions/Distributed acoustic sensing on submarine optical fibre cables for seismic monitoring
邀请人：何祖源教授
时间：6月13日 15:00-17:00
地点：电院5号楼214会议室
Prof. Luc Thévenaz
Emeritus Professor in Swiss Federal Institute of Technology in Lausanne (EPFL)
Co-Executive Editor-in-Chief of Light: Science & Applications
报告题目：Exploring New Horizons in Optical Fibre Sensing Based on Gas Interactions
时间：6月13日 15:00
地点：电院5号楼214会议室
报告摘要：
The emergence of microstructured holey optical fibres has revolutionized fibre-based sensing by enabling light to interact directly with gases introduced into the fibre’s internal structure. Among these, hollow-core fibres present a particularly powerful platform, where light propagates predominantly through a gas-filled core rather than solid silica. This configuration enables exceptionally strong light–gas interactions while also offering propagation losses that are lower than those in conventional silica-core fibres.
Such architectures provide a unique degree of freedom in customizing the sensing environment, allowing the use of a wide range of gases tailored to specific sensing applications. This flexibility leads to sensing performances that exceed traditional expectations, especially in terms of sensitivity, specificity, and dynamic range.
In this presentation, we will showcase recent advances that demonstrate the potential of gas-based interactions in distributed optical fibre sensing. These include sensors with significantly enhanced response and sensitivity compared to silica-only systems, and the ability to deliver absolute measurements that are inherently immune to temperature and strain cross-sensitivities. Importantly, these systems have demonstrated unmatched performance in cryogenic temperature sensing, offering reliable, high-resolution measurements in extreme environments where conventional techniques fall short.
These results point towards a new class of optical fibre sensors that leverage the synergistic interplay between guided light and tailored gas environments—offering novel solutions for environmental, industrial, and scientific sensing challenges.
主讲人简介：
Luc Thévenaz received his M.Sc. and Ph.D. degrees in physics from the University of Geneva, Switzerland. In 1988, he joined the Swiss Federal Institute of Technology in Lausanne (EPFL), where he is now an Emeritus Professor, having led a research group specializing in photonics. His research interests encompass fiber sensors, slow and fast light phenomena, nonlinear fiber optics, and laser spectroscopy in gases. He is widely recognized for his pioneering contributions to the application of stimulated Brillouin scattering in optical fibers, particularly for his innovative concepts that have pushed the frontiers of distributed fiber sensing.
Throughout his career, he has held visiting positions at Stanford University, the Korea Advanced Institute of Science and Technology (KAIST), Tel Aviv University, the University of Sydney, and the Polytechnic University of Valencia. In 2000, he co-founded Omnisens, a company dedicated to developing and commercializing advanced photonic instrumentation based on distributed fiber sensing technologies.
Professor Thévenaz has actively contributed to the organization of leading international conferences, serving on the Steering and Technical Committees of events such as OFS, ECOC, CLEO-Europe, and APC. He has also served as Associate Editor for IEEE Photonics Technology Letters and the Journal of Lightwave Technology, and is currently Co-Executive Editor-in-Chief of Light: Science & Applications (Nature Publishing Group).
He is a Fellow of IEEE and Optica (formerly OSA), and a Member of the Swiss Academy of Engineering Sciences.
Academic Reports
Prof. Marcelo Soto
Associate Professor in Universidad Técnica Federico Santa María, Valparaíso, Chile
报告题目：Distributed acoustic sensing on submarine optical fibre cables for seismic monitoring
时间：6月13日 15:45
地点：电院5号楼214会议室
报告摘要：
Submarine regions remain among the most challenging environments to monitor seismic activity —yet they are also where many of the planet’s most powerful earthquakes originate. This presentation highlights how distributed acoustic sensing (DAS) is transforming this scenario by turning existing submarine telecom optical fibre cables into dense, real-time seismic sensor networks. We explore the potential of DAS for detecting earthquakes, ocean waves, and deep-sea currents, using real measurements from a commercial telecom cable deployed offshore Valparaíso, Chile. This approach offers a cost-effective, scalable, and low-maintenance solution for seismic monitoring in oceanic regions, where deploying traditional instruments is often unfeasible. The presentation also shows how the integration of deep learning techniques significantly enhances DAS signal interpretation—enabling not only improved earthquake detection but also the possibility of denoising, magnitude estimation, and epicentre localisation. Overall, this presentation will show how the convergence of DAS technology and artificial intelligence is opening a new frontier in marine seismology and early warning systems, with enormous implications for coastal safety and scientific research.
主讲人简介：
Marcelo Soto received the Ph.D. degree in Innovative Technologies, major in Telecommunications, from the Scuola Superiore Sant Anna, Pisa, Italy, in 2011. During 2010–2011, he was a Research Fellow at Scuola Sant’Anna, where he worked on distributed optical fibre sensors based on Raman and Brillouin scattering. Between 2011 and 2017, he was a Postdoctoral Researcher at EPFL Swiss Federal Institute of Technology of Lausanne, Switzerland, where he worked on high-performance Brillouin and Rayleigh distributed fibre sensing, nonlinear fibre optics, optical signal processing, and optical Nyquist pulse generation. In 2018 he joined Universidad Técnica Federico Santa María, Valparaíso, Chile, where he is now Associate Professor since 2022. Between 2019 and 2021 he also had an invited position as one of the “100 distinguished invited professors” at Guangzhou University, in China.
He is author or coauthor of over 230 scientific publications in international refereed journals and conferences, 3 book chapters and 9 patents in the fields of optical communications and optical fibre sensing. Dr. Soto is Senior Member of Optica, Member of the Institute of Electrical and Electronics Engineers (IEEE), Associate Editor of the IEEE Journal of Lightwave Technology and the Elsevier Journal of Optical Fiber Technology, and he is in the Board of Reviewers of major international journals in photonics.