Optical fiber gratings for all-optical signal processing and sensing
Prof. Xuewen Shu
FOptica, FInstP
Huazhong University of Science and Technology (HUST), Hubei, China
Abstract: This talk presents an overview of our research progress on optical fiber gratings and
their applications in all-optical signal processing and sensing. Optical Fiber Bragg gratings (FBGs),
which are refractive index modulation structures fabricated within optical fibers via laser
inscription, feature full compatibility with fiber systems and low insertion loss, rendering them
ideal platforms for all-optical signal processing in optical fiber communication systems. We have
developed a variety of FBG-based devices, including phase-modulated gratings for photonic
temporal differentiation, integration, and pulse shaping; Gires-Tournois etalons for tunable
dispersion compensation; and specially engineered complex gratings for optical format
conversion. In the sensing domain, we have demonstrated high-sensitivity sensors based on
long-period fiber gratings (LPFGs), particularly small-period LPFGs fabricated by femtosecond
lasers with improved refractive index sensitivity and dual-parameter sensing capability.
Additionally, we have explored various fiber grating structures for curvature and twist
measurement. These results demonstrate the versatility and potential of fiber gratings for high-
performance all-optical processing and smart sensing applications.
Brief Biography of the Speaker:
Dr Shu Xuewen is a full-professor at Wuhan National Laboratory for Optoelectronics (WNLO),
Huazhong University of Science and Technology (HUST), China. He received his Ph.D. degree in
optoelectronics from Huazhong University of Science and Technology, China, in 2000. From 2001
to 2013, he worked first as a Senior Engineer at Indigo Photonics Ltd. and then as a Senior
Research Fellow with the Aston Institute of Photonic Technologies (AIPT) at Aston University, UK.
He has published over 300 papers in major international journals and conferences and also holds
over 30 patents. He serves as an Associate Editor for IEEE Sensors Letters and other two journals.
He is a Fellow of Optica (Formerly OSA), and a Fellow of the Institute of Physics, and has been
recognized as one of the Highly Cited Chinese Researchers by Elsevier. His research interests
include optical fiber gratings, optical fiber communications, optical sensors, fiber lasers and laser
based micro-/nano-fabrication.