Abstract
Distributed fiber optic sensor, which uses fiber optic as the medium for transmission and sensing fusion, owns unique advantages such as high sensitivity, large scale, and high resolution. In recent years, they have received research attention from numerous application fields and are gradually being pushed towards industrialization. Specifically, the research and development of special sensing optical fibers and their distributed sensing technologies have become the research hotspot. This talk will introduce the research progress of the backscattering enhanced optical fiber, the acoustic pressure sensitive optical fiber cable and distributed acoustic sensing technologies, mainly including the design principle, theoretical model and fabrication technique. Then, the key technologies such as sensitivity enhancement, phase noise suppression, and measurement distance extension for high-performance distributed acoustic sensing are discussed. In addition, the artificial intelligence (AI) technology is investigated to learn effective data patterns for robust recognition, as well as the modified strategies of data augmentation and domain adaptation is proposed for the AI+DAS to improve the model generalization ability. Moreover, typical engineering applications in the fields of geological exploration, infrastructure health monitoring and submarine detection are presented and prospected.
Brief Biography
Dr. Qizhen Sun is the full Professor of Optoeletronics at School of Optical and Electronic Information (SOEI), and the vice-president at School of Future Technology, in Huazhong University of Science and Technology (HUST). She has won the National Science Funds for Distinguished Young Scholars and Excellent Young Scholars of China, and was granted by the leader of Innovation Group in Hubei Province, and the Marie Curie fellowship of the European Union. Her research spans micro/nano-structured fiber optical devices, optical fiber sensing technologies and applications. She has published more than 150 papers in recent years; and has 45 authorized invention patents, 3 software copyrights. Her research achievements have been applied in many fields and recognized by several awards, including the first prize for technical invention of China Society of Communications, the first prize for innovative products of the Chinese Society of Optical Engineering and the gold medal of the Geneva International Invention Exhibition, etc.