A5042422558- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Orbital Angular Momentum in Optics
- Photonic Crystal and Fiber Optics
- Nuclear physics research studies
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Plasmonic and Surface Plasmon Research
- Optical Network Technologies
- Digital Holography and Microscopy
- Microfluidic and Bio-sensing Technologies
- Mechanical and Optical Resonators
- Quantum Chromodynamics and Particle Interactions
- Metamaterials and Metasurfaces Applications
- Near-Field Optical Microscopy
- Optical Coherence Tomography Applications
- Optical Wireless Communication Technologies
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Nonlinear Optical Materials Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Photoacoustic and Ultrasonic Imaging
- Semiconductor Lasers and Optical Devices
- Fusion materials and technologies
Shenzhen University
2016-2025
Chinese Academy of Sciences
2013-2025
University of Chinese Academy of Sciences
2013-2025
Fujian Institute of Research on the Structure of Matter
2025
Peng Cheng Laboratory
2024
Institute of Genetics and Developmental Biology
2024
Institute of Modern Physics
2013-2022
Hengdian Group DMEGC Magnetics (China)
2019
Peking University
2017
State Key Laboratory of Nuclear Physics and Technology
2017
A high-efficiency grating fabrication method was, for the first time, demonstrated to inscribe helical long period fiber gratings (H-LPFGs) in small numbers by means of twisting a standard single-mode (SMF) during hydrogen-oxygen flame heating and then cutting into series sections. Each section was desired LPFG whose resonant wavelength, i.e., pitch, can be changed adjusting twist rate fiber. The H-LPFG inscribed SMF could used generate orbital angular momentum (OAM) modes, OAM+1 mode, with...
The sensors measuring torsion, refractive index, and temperature are demonstrated, based on an improved helical long-period fiber gratings (HLPFG), in which the refractive-index torsion sensitivity were significantly enhanced by reducing grating diameter. This was achieved using velocity difference between two translational stages as optical heated a hydrogen-oxygen flame. As diameter decreases from 109 to 85 μm, sensor's at RI of 1.444 increases -1210.20 -3133.80 nm/RIU, -245.80 -942.77...
High-order orbital angular momentum (OAM) modes, namely, OAM+5 and OAM+6, were generated demonstrated experimentally by twisting a solid-core hexagonal photonic crystal fiber (PCF) during hydrogen–oxygen flame heating. Leaky resonances in the cladding depend strongly on twist rate length of helical PCF. Moreover, high-order OAM mode could be polarized mode. The secret successful observation modes is that leaky twisted PCF have high coupling efficiency more than −20 dB.
In this paper, the circular Airy derivative beams carrying rotationally-symmetric power-exponent-phase vortices are proposed for first time, whose evolutionary properties explored by theoretical analysis as well experimental verification. The intensity and phase distributions of kind beam can be flexibly modulated controlling its parameters such order, topological charge, power order. Intriguingly, evolution with different fractional charges is also investigated in detail means singularities...
A novel, low-cost, and simple dual-parameter measurement scheme based on a cascaded optical fiber device composed of long-period grating (LPFG) an S taper Mach-Zehnder interferometer (SFT-MZI) is proposed demonstrated. The crosstalk problem solved as different resonance peaks the LPFG MZI possess refractive index (RI) temperature sensitivities. Experimental results show distinctive spectral sensitivities -52.57 nm/refractive unit (RIU) 45.87 pm/°C by LPFG, 311.48 nm/RIU (in RI range...
A novel bending vector sensor based on spatial cascaded orthogonal long period fiber gratings (SCO-LPFGs) written by high-frequency CO(2) laser pulses has been proposed, and two-dimensional sensing characteristics the simple SCO-LPFGs have experimentally demonstrated. three-dimensional coordinate system established, measurement results of proposed above is given, furthermore both curvature bending-direction could be intuitively solved according to coordinates. The research work presented in...
We demonstrate a novel polyvinyl chloride (PVC) diaphragm-based fiber-tip Fabry-Perot interferometer for gas-pressure measurements with ultrahigh sensitivity. The PVC diaphragm has been coated to the end facet of well-cut standard single-mode fiber by use plastic welder. An ultrahigh-pressure sensitivity ~65.5 nm/MPa at 1565 nm and low-temperature cross ~-5.5 kPa/°C have experimentally demonstrated. proposed sensor advantages high pressure sensitivity, miniature size, low cost, easy fabrication.
A novel optical fiber grating vector bending sensor head is proposed. The asymmetric characteristics are embedded in the by tilting planes at increasing angles, as moving away from center grid of structure. high-frequency-CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -laser used to fabricate head. Due structure, sensitivity for curvature range -2 0 m <sup xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> reaches 8.53 nm/ , and 2...
A novel long-period fiber grating (LPFG), fabricated by periodically cascading a series of screw-type distortions, is proposed and experimentally demonstrated. These distortions are induced twisting the during CO2 laser beam exposure. The resulting LPFG will either be left- or right-hand helical, depending on twist rate direction used fabrication, with certain frozen shear strain. Due to independence between pitch rate, this type could more flexible than helical- chiral-fiber gratings...
A novel long period fiber grating (LPFG) is inscribed in few mode fibers by CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -laser-irradiation method. The experiment results and theoretical calculation demonstrate that the LPFGs are originated from strong coupling between fundamental core LP01 high-order LP11. resonant wavelength found to shift toward lower with temperature or force increasing, which quite different fabricated common...
We demonstrate an ultrahigh-sensitivity gas pressure sensor based on the Fabry-Perot interferometer employing a fiber-tip diaphragm-sealed cavity. The cavity is comprised of silica capillary and ultrathin diaphragm with thickness 170 nm, represents thinnest fabricated thus far by electrical arc discharge technique. resulting interferometer-based demonstrates sensitivity about 12.22 nm/kPa, which more than two orders magnitude greater that similarly configured air bubble sensor. Moreover, our...
"Lab on Fiber" technology integrates different micro- and nanoscale structures or materials onto optical fibers to create additional functionality. With the advanced femtosecond (Fs) laser-induced two-photon polymerization (TPP) technology, polymer microstructures printed a fiber tip have great potential as micro-optical sensors. However, functionalization is usually required, which costly complex. Based four-dimensional (4D) printing theory, for first time, successive multimaterial on-fiber...
A polarization-independent orbital angular momentum (OAM) generator, based on a chiral fiber grating (CFG), is proposed and demonstrated for the first time, to best of our knowledge. Helical phases were successfully excited in this device arbitrary polarization states input light, resulting OAM modes could be produced with desired state. The employed CFG was fabricated by twisting fused few-mode during hydrogen-oxygen flame heating. characteristics, helical phase, purity coupled...
A hybrid optical fiber structure of two cascading long-period gratings (LPFGs), respectively, inscribed on a segment few-mode (FMF) and single-mode (SMF), is proposed experimentally demonstrated. This could be used for simultaneous measurement strain temperature. The FMF-LPFG exhibits an opposite temperature response higher sensitivity compared to that the SMF-LPFG, which can improve resolutions. Experimentally, sensitivities sensor are -2.9 pm/με -17.6 pm/°C, FMF-LPFG; these -1.47 46.4...
A liquid modified photonic crystal fiber (PCF) integrated with an embedded directional coupler and multi-mode interferometer is fabricated by infiltrating three adjacent air holes of the innermost layer standard 1.48 refractive index liquids. The filled higher than that background silica, which can not only support transmitting rod modes but also “liquid core” propagating between PCF core rods. Hence, light in be efficiently coupled into satellite waveguides under phase-matching conditions,...
A microfiber-enabled Fabry-Pérot interferometer (FPI) constructed by splicing a section of microfiber between two cleaved standard single-mode fibers (SMFs) with unique relative fiber cross relationship has been proposed and experimentally demonstrated. The opening air cavity the SMF ends connected serves as an FP also direct sensing head. characteristics FPIs different lengths diameters have studied. force sensitivity high 167.41 nm/N (~200 pm/με) refractive index (RI) 1330.8 nm/RIU (around...
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...
Optical orbital angular momentum (OAM) has been recently implemented in holography technologies as an independent degree of freedom for boosting information capacity. However, the capacity and fidelity suffer from limited space-bandwidth product (SBP) channel crosstalk, albeit OAM mode set exploited multiplexing channels is theoretically unbounded. Here, we propose ultra-dense perfect holography, which modes are discriminated both radially angularly. As such, constructs two-dimensional...
Abstract Optical fibers are typically used in telecommunications services for data transmission, where the use of fiber tags is essential to distinguish between different transmission or channels and thus ensure working functionality communication system. Traditional physical entity marking methods labeling bulky, easily confused, and, most importantly, label information can be accessed by all potential users. This work proposes an encrypted optical tag based on encoded Bragg grating (FBG)...
A diaphragm-free probe-type gas-pressure sensor is proposed and experimentally demonstrated based on a hollow-core photonic bandgap fiber (HC-PBF) with quartz capillary. The section of the HC-PBF acts as Fabry-Perot cavity, capillary microfluidic channel for gas inlet. An inner diameter (∼2 μm) smaller than (∼10.9 ensures mirror reflection simultaneously. probe has minimal size (∼125 can function at pressures high 8 MPa. higher pressure test limited by our generation devices. Excellent...
Conventional grating-inscription technology usually inscribes only one fiber Bragg grating (FBG) in the core of an optical fiber. A novel femtosecond laser point-by-point was demonstrated to parallel-inscribe multiple FBGs, i.e., so-called parallel-integrated FBGs (PI-FBGs), with either different or same reflection wavelengths a standard single-mode Single- multiwavelength PI-FBGs exhibited peaks spectrum, respectively. The length can be shortened hundreds micrometers increase spatial...
Angular distributions of quasielastic scattering and breakup the neutron-rich halo nucleus 11Be on a 208Pb target at an incident energy 140 MeV (about 3.5 times Coulomb barrier) were measured HIRFL-RIBLL. A strong suppression nuclear interference peak is observed in angular distribution. The result demonstrates for first time persistence coupling effect reported so far reaction systems involving neutron-halo nuclei this relatively high energy. cross sections are satisfactorily reproduced by...
A broadband tunable orbital angular momentum (OAM) mode converter based on a helical long-period fiber grating (HLPFG) inscribed in conventional single-mode (SMF) is experimentally demonstrated. The proposed all-fiber OAM the core-cladding dual resonance near dispersion turning point (DTP). can operate with bandwidth of 303.9 nm @ −3 dB and 182.2 −10 dB, which is, as far we know, widest for SMF. Furthermore, be dynamically tuned within large dynamic range (>80 nm) by simply twisting...
We demonstrate the fabrication of single-mode helical Bragg grating waveguides (HBGWs) in a multimode coreless fiber by using femtosecond laser direct writing technique. This approach provides single-step method for creating waveguides. Specifically, unique structure such an HBGW serves as depressed cladding waveguide and also generates strong resonance due to its periodicity. Effects pulse energy, diameter, pitch used fabricating HBGWs were studied, with narrow bandwidth 0.43 nm wavelength...