A5019431977- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Gas Sensing Nanomaterials and Sensors
- Laser Material Processing Techniques
- Optical Coherence Tomography Applications
- Semiconductor Lasers and Optical Devices
- Water Quality Monitoring Technologies
- Advanced Chemical Sensor Technologies
- Mechanical and Optical Resonators
- Underwater Vehicles and Communication Systems
- Spectroscopy and Laser Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Carbon Nanotubes in Composites
- Plasmonic and Surface Plasmon Research
- Energy Efficient Wireless Sensor Networks
- Photosynthetic Processes and Mechanisms
- Electrohydrodynamics and Fluid Dynamics
- Fire dynamics and safety research
- Microbial Fuel Cells and Bioremediation
- Adhesion, Friction, and Surface Interactions
- Generative Adversarial Networks and Image Synthesis
- Electrocatalysts for Energy Conversion
- Ultrasonics and Acoustic Wave Propagation
- Water Systems and Optimization
Nanjing University
2020-2025
State Key Laboratory of Pollution Control and Resource Reuse
2024-2025
Henan Normal University
2025
University of Pittsburgh
2019-2024
Xi'an University of Architecture and Technology
2023
Yantai University
2023
Zhejiang University
2023
Collaborative Innovation Center of Advanced Microstructures
2020
Hohai University
2010-2011
Abstract The femtosecond laser has emerged as a powerful tool for micro- and nanoscale device fabrication. Through nonlinear ionization processes, nanometer-sized material modifications can be inscribed in transparent materials This paper describes precision inscription of nanograting silica fiber cores to form both distributed point sensors sensing applications extreme environmental conditions. the use scanning electron microscope imaging processing optimization, high-temperature stable,...
Enzymes facilitate the conversion of chemical energy into mechanical work during biochemical reactions, thereby regulating dynamic metabolic activity living systems. However, directly observing release facilitated by fluctuating individual enzymes remains a challenge, leading to contentious debate regarding underlying reasons for this phenomenon. Here, we aim overcome challenge developing an oscillating nanomotor powered single-molecule enzyme, which allows real-time tracking transduction in...
This Letter presents an approach to produce multiplexable optical fiber chemical sensor using intrinsic Fabry-Perot interferometer (IFPI) array via the femtosecond laser direct writing technique. Using hydrogen-sensitive palladium (Pd) alloy as a functional sensory material, Pd coated IFPI devices can reproducibly and reversibly measure hydrogen concentrations with detection limit of 0.25% at room temperature. Seven sensors were fabricated in one performed simultaneous temperature...
This paper presents a method of using femtosecond laser inscribed nanograting as low-loss– and high-temperature–stable in-fiber reflectors. By introducing pair inside the core single-mode optical fiber, an intrinsic Fabry-Perot interferometer can be created for high-temperature sensing applications. The morphology in fiber cores was engineered by tuning fabrication conditions to achieve high fringe visibility 0.49 low insertion loss 0.002 dB per sensor. Using white light interferometry...
This paper is a comprehensive experimental report on the neutron radiation effects of distributed optical fiber sensors with enhanced Rayleigh scattering profiles in an in-pile environment. Femtosecond laser direct writing was used to inscribe Type-II modifications standard telecom fibers and radiation-hardened fluorine-doped cores. backscattering signals were for continuous 1.5 m. In-pile lead-out tests carried out at MIT Research Reactor two months, which operated nominal power 5.7 MW fast...
This paper reports the development of fiber optical hydrogen sensors using palladium and gold alloy nanostructures as sensor materials for measurements a D-shaped platform. Using maskless reactive ion etching technique, silica nanocone structures were formed on surface fiber. Palladium alloys deposited nanostructured to form nano-alloy film. Evanescent interaction between guided light propagated in core enabled highly sensitive detection from concentrations that ranged 0.25% 10% atmosphere...
This paper presents a fast demodulation algorithm to determine fiber Bragg grating (FBG) from spectra acquired by low wavelength resolution spectrometers. A modified and improved Buneman frequency estimation is employed in tracking FBG eliminating discontinuities real-time calculations. The was tested using 512-element detector array spectrometer with 156 pm/element resolution. At 2-kHz spectrum acquisition rate, the achieved 0.048 pm computational efficiency robustness of new compared...
This paper presents a method of reel-to-reel femtosecond laser direct writing that enables the continuous inscription low-loss and high-temperature stable Rayleigh scattering centers inside core single-mode optical fibers for distributed temperature sensing up to 1000°C. By examining correlation between backscattering profile cross-section morphology laser-induced nanograting in fiber cores, this reveals mechanisms underlie fabrication sensors with low loss. fine-tuning exposure conditions,...
Water-regime monitoring system is a wireless-sensor-network (WSN) based real-time system. It often collects, transmits, analyzes and processes water regime parameters in large areas. Since the cluster-head selection mechanism affects directly on energy consumption network lifetime, both cluster saving strategy play an important role design of routing protocols. Current algorithms usually have two shortages: unbalanced loads short lifetime. They could not be used systems. In this paper, idea...
Hydrogen production by photosynthetic hybrid systems (PBSs) offers a promising avenue for renewable energy. However, the light-harvesting efficiency of PBSs remains constrained due to unclear intracellular kinetic factors. Here, we present an operando elucidation sluggish behavior existing and strategies circumvent them. By quantifying spectral shift in structural color scattering individual during process, observe accumulation product hydrogen bubbles on their outer membrane. These act as...
Deep generative models are effective in style transfer. Previous methods learn one or several specific artist-style from a collection of artworks. These not only homogenize the different artworks same artist but also lack generalization for unseen artists. To solve these challenges, we propose double-style transferring module (DSTM). It extracts and artwork-style (even untrained) preserves intrinsic diversity between artist. DSTM swaps two styles adversarial training encourages realistic...
Plasmonic nanoantennas have been widely explored for boosting up light-matter interactions due to their ability of providing strongly confined and highly enhanced electric near fields, so called 'hot-spots'. Here, we propose a dielectric-loading approach hot-spots engineering by coating the conventional plasmonic with conformal high refractive index dielectric film forming dielectric-loaded nanoantennas. Compared nanoantennas, corresponding ones that resonate at same frequency are able...
Water-environment monitoring network (WMN) is a wireless sensor based real-time system, which collects, transmits, analyzes and processes water-environment parameters in large area. Both cluster selection mechanisms energy saving strategies play an important role on designing routing protocols for the WMN. Since those existing algorithms can not be used directly WMN, we thus propose improved version of LEACH, LEACH-Head Expected Frequency Appraisal (LEACH-HEFA) algorithm, WMN this paper....
We report on the experimental investigation of polarity-switchable hot electron-induced photocurrents in dual-plasmonic nanostructures, consisting two layers gold nanoparticles (AuNPs) separated by a TiO<sub>2</sub>film.
A cascaded string of six intrinsic Fabry-Perot Interferometer sensors was fabricated inside a silica fiber for high-temperature sensing using ultrafast laser direct writing. These were interrogated by the fast white-light interferometer demodulation in real-time, yielding temperature sensitivity between 4.4-13.4nm/°C up to 800°C at spatial resolution 1-cm.
This paper presents a multiplexable fiber optic chemical sensor with the capability of monitoring hydrogen gas concentration at high temperatures up to 750 °C. The Pd-nanoparticle infused TiO2 films coated on intrinsic Fabry–Perot interferometer (IFPI) array were used as sensory films. Strains induced upon exposure varied concentrations can be monitored by IFPI sensors. shows repetitive and reversible response when exposed low level (1–6%) gas. Uniform behavior across all sensing cavities is...
UWFBG was fabricated in single-mode fiber through Ti-Doped Silica Outer Cladding using KrF 248-nm excimer laser for phase-sensitive distributed acoustic sensing (DAS). This paper suggests a new approach to produce fibers DAS.
An integrated approach is presented to detect pipeline defects using distributed acoustic sensors and machine learning. Over 80% accuracy for defected pipe identification was achieved with defect depth classifications error less than 1-mm.
This paper reports enhanced Rayleigh backscattering points fabricated in single-mode fiber using a femtosecond laser direct-writing technique for the formation of an intrinsic Fabry-Perot interferometer (FPI) sensor. The temperature sensitivity FPI is measured as 7.8pm/°C.