A5103039753- Geochemistry and Elemental Analysis
- Geological and Geochemical Analysis
- Advanced Fiber Optic Sensors
- Paleontology and Stratigraphy of Fossils
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Radioactive element chemistry and processing
- Optical Network Technologies
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Geomagnetism and Paleomagnetism Studies
- Magneto-Optical Properties and Applications
- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Analytical Chemistry and Sensors
- Hydrocarbon exploration and reservoir analysis
- Advanced biosensing and bioanalysis techniques
- Extraction and Separation Processes
- Advanced Photocatalysis Techniques
- Fire Detection and Safety Systems
- Mercury impact and mitigation studies
- Analytical chemistry methods development
Institute of Geology and Geophysics
2015-2024
Chinese Academy of Sciences
2015-2024
University of Chinese Academy of Sciences
2014-2024
Aston University
2014-2024
Jilin International Studies University
2024
Shandong University of Technology
2020-2023
Yale University
2020-2023
Chongqing University of Posts and Telecommunications
2021-2023
Planetary Science Institute
2021-2023
Agro-Environmental Protection Institute
2022
We UV inscribe and characterize a long-period fiber grating with period of 25 μm. A series polarization-dependent dual-peak pairs can be seen in the transmission spectrum, even though only symmetrical refractive index modification is introduced. The fabricated exhibits lower temperature sensitivity compared standard gratings an enhanced ∼312.5 nm/RIU averaged from 1.315 to 1.395, which more than four-fold higher this range. full width at half-maximum about 0.6 nm, allowing for...
We have theoretically and experimentally investigated the dualpeak feature of tilted fiber gratings with excessively structure (named as Ex-TFGs).We explained dual-peak by solving eigenvalue equations for TM 0m TE a circular waveguide, in which (transverse electric) magnetic) core modes are coupled into cladding modes, respectively.Meanwhile, experiment, we verified that one dual peaks at shorter wavelength is due to mode coupling whereas other longer arises from when linearly polarized...
The paper presents selective fiber Bragg grating (FBG) inscription in four-core based on a phase mask scanning method. factors are systematically investigated, which involves core position and focused laser beam size fiber, etc. Several specific inscriptions (including individual, dual all inscriptions) demonstrated. Two orthogonally positioned cores selectively inscribed applied to two-dimension vector bending measurement. measured sensitivities of two FBGs range from −54.3 pm/m −1 52.2...
Significance Earth’s transition from anoxic oceans and atmosphere to a well-oxygenated state led major changes in nearly every surficial system. However, estimates of surface oxygen levels the billion years preceding this shift span two orders magnitude, suggesting poor understanding evolution cycle. We use isotopic record iron oxides deposited ancient shallow marine environments show that remained at extremely low ocean–atmosphere system for most history, rise occurred step with expansion...
The Paleoproterozoic (~2.38–2.21 Ga) Yuanjiacun banded iron formation (BIF), located in Shanxi Province, is a Superior-type BIF the North China craton. This within metasedimentary rock succession of Formation, lower Luliang Group, which has undergone greenschist-facies metamor phism. Iron oxide (magnetite and hematite), carbonate, silicate facies are all present iron-rich layers. eastward transition from carbonate- into oxide-facies formations accompanied by change mineralogical composition...
A high-sensitivity curvature sensing configuration is implemented by using a fiber Mach-Zehnder interferometer (MZI) with D-shaped Bragg grating (FBG). segment of fusion spliced into single mode at both sides, and then short FBG inscribed in the fiber. The device yields significant spectrum sensitivity as high 87.7 nm/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> to ultralow range from 0 0.3 m , can distinguish orientation...
We demonstrate a directional curvature sensor based on tilted few-mode fiber Bragg gratings (FM-FBGs) inscribed by UV laser. The eigenmodes of LP01 and LP11 mode groups are simulated along with the bending. is resonance in FM-FBG. For from 4.883 to 7.625 m−1, sensitivities at direction 0° 90° measured be −2.67 0.128 dB/m−1, respectively. temperature variation barely affects depth mode. proposed clearly demonstrates potential simultaneous measurement resolutions 9.15×10−4 m−1 0.952°C,
We present a plasmonic biosensor capable of detecting the presence bisphenol A in ultra-low concentrations, yielding wavelength shift 0.15 ± 0.01 nm response to solution 1 fM concentration with limit detection 330 70 aM The biosensing device consists an array gold nano-antennae total length 2.3 cm that generate coupled localised surface plasmons (cLSPs) and is covalently modified aptamer specific for recognition. fabricated on lapped section standard telecommunication optical fibre, allowing...
Abstract Banded iron formations (BIFs) are among the few chemical sedimentary archives that capture biogeo-chemical evolution of Fe cycling and redox early Earth. Although biologically recycled continental has been previously proposed to be a significant source in BIFs deposited from stratified ocean at onset Great Oxidation Event (GOE; ~2.5–2.2 Ga), constraining sources pathways Archean remains challenging. Here we present major trace element Fe-Nd-Cr isotope data for largest BIF (i.e.,...
We present a refractometer with main-and vernier-scale to measure the refractive index (RI) of liquids high precision by using fine spectrum structure tilted fiber Bragg grating (TFBG).The absolute RI values are determined accurate wavelength cut-off mode resonances.The calibrated measuring large groups spectra at different resonances in small range, and use certainly reduces measurement uncertainty resulted from discrete cladding performance TFBG-based vernier is experimentally verified...
Excellent MB adsorption and degradation capacity of hybrid phase TiO 2 /g-C 3 N 4 photocatalysts based on surface polarization S-scheme charge transfer.