A5114686038- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- IPv6, Mobility, Handover, Networks, Security
- Photorefractive and Nonlinear Optics
- Advancements in Battery Materials
- Power Systems and Technologies
- Mobile Agent-Based Network Management
- Laser Design and Applications
- Smart Grid and Power Systems
- Internet Traffic Analysis and Secure E-voting
- Advanced Battery Materials and Technologies
- Luminescence Properties of Advanced Materials
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Advanced Battery Technologies Research
- Electrical Fault Detection and Protection
- Power System Reliability and Maintenance
- Advanced Authentication Protocols Security
- Power Systems and Renewable Energy
- Magnetic Bearings and Levitation Dynamics
- Neural Networks and Reservoir Computing
- Microwave Engineering and Waveguides
- Optical Wireless Communication Technologies
- Wireless Power Transfer Systems
- Analog and Mixed-Signal Circuit Design
The University of Queensland
2022-2025
Chinese Academy of Sciences
2006-2024
Fujian Institute of Research on the Structure of Matter
2014-2024
Tan Kah Kee Innovation Laboratory
2024
China Southern Power Grid (China)
2023
Fujian Normal University
2023
Semiconductor Manufacturing International (China)
2022
China University of Mining and Technology
2022
Shanghai Institute of Optics and Fine Mechanics
2017-2022
Wuhan University of Technology
2017-2022
Favorable characteristics, such as high energy density, cost efficiency, and environmental benignity, render lithium–sulfur (Li–S) batteries a promising candidate to meet the increasing demand for efficient economic energy‐storage systems. Many efforts have been devoted much progress has achieved in Li–S‐battery research from both scientific technological viewpoints. Various tools, methods, protocols developed research. Here, these advancements are summarized, spectroscopic electrochemical...
Medicine counterfeiting is a serious issue worldwide, involving potentially devastating health repercussions. Advanced anti-counterfeit technology for drugs has therefore aroused intensive interest. However, existing technologies are associated with drawbacks such as the high cost, complex fabrication process, sophisticated operation and incapability in authenticating drug ingredients. In this contribution, we developed smart phone recognition based upconversion fluorescent three-dimensional...
The practical application of Li-S batteries is seriously hindered due to its shuttle effect and sluggish redox reaction, which requires a better functional separator solve the problems. Herein, polypropylene separators modified by MoS2 nanosheets with atomically dispersed nickel (Ni-MoS2 ) are prepared prevent facilitate kinetics for batteries. Compared pristine nanosheets, Ni-MoS2 exhibit both excellent adsorption catalysis performance overcoming effect. Assembled this novel separator, an...
A nanocomposite material consisting of a copper ion-based metal–organic gel (MOG-Cu) and multiwalled carbon nanotubes (MWCNTs) was prepared served to construct sensor for electrochemical detection nitrite. The micromorphology the MOG-Cu-MWCNT characterized. effects MWCNT doping on formation Cu-based MOG its property nitrite electro-oxidation were evaluated. It shows that optimal amount MWCNTs does not influence nanofiber structure but can increase surface area facilitate interfacial charge...
A simple yet effective Denial of Service (DoS) attack on SIP servers is to flood the server with requests addressed at irresolvable domain names. In this paper we evaluate different possibilities mitigate these effects and show that over-provisioning not sufficient handle such attacks. As a more approach present solution called DNS Attack Detection Prevention (DADP) scheme based usage non-blocking cache. Based various measurement conducted over Internet investigate efficiency DADP compare...
We have experimentally demonstrated passively Q-switched (PQS) stimulated Raman scatting (SRS) emissions in an a-cut YVO4 crystal a coupled cavity, using Yb:YAG/YAG/Cr4+:YAG/YAG composite to generate the PQS fundamental laser, for first time, our best knowledge. At incident pump power of 6.30 W, Stokes average output 0.42 W was achieved. Due cascaded effect, four first-Stokes lines operating at 1092.6 nm, 1125.4 1135.1 nm and 1157.0 three second-Stokes 1210.6 1263.2 1290.1 were generated...
We report on sub-50 fs pulse generation from a passively mode-locked Yb:SrF2 laser pumped with spatially single-mode, fiber-coupled diode at 976 nm. In the continuous-wave regime, generated maximum output power of 704 mW 1048 nm threshold 64 and slope efficiency 77.2%. A continuous wavelength tuning across 89 (1006 - 1095 nm) was achieved Lyot filter. By implementing SEmiconductor Saturable Absorber Mirror (SESAM) for initiating sustaining operation, soliton pulses as short 49 were 1057 an...
Many emergent security threats which did not exist in the traditional telephony network are introduced SIP VoIP services. To provide high-level assurance to services, an inter-domain authentication mechanism is defined RFC 4474. However, this introduces another vulnerability: a timing attack can be used for effectively revealing calling history of group users. The idea here exploit certificate cache mechanisms supported by infrastructures, from caller's domain will cached callee's proxy...
In this paper, we consider how to optimally schedule packet transmissions from mobile devices over two network interfaces when uploading content files the media cloud. Our design objective is minimize total energy consumption while respecting a deterministic delay constraint. We present convex optimization formulation of problem, and show that it can be decoupled into sequential sub-problems: (i) allocate all packets onto interfaces, (ii) transmission durations each interface. Analytical...
We experimentally demonstrated the manipulation of 2 μm linearly polarized states in a diode-pumped YAG/Tm:YAG/YAG laser with high polarization extinction ratio 28 dB for very first time to best our knowledge. A stable state was achieved without using any specific intracavity optical polarization-selected elements. The unexpected phenomenon tunable linear directions observed. Multidistinct were obtained, including peculiar case switchable orthogonally directions.
Nd:Gd2SrAl2O7 crystals were grown by the Czochralski technique; thermal, spectral and laser properties investigated in detail. The average thermal expansion coefficients along a- c-axis are 12.6 × 10−6 K−1 14.9 K−1, respectively. At room temperature, conductivities 4.98 5.24 W (m−1 * K−1) c-axis, absorption cross sections at ~808 nm 13.7 10−20 cm2 with a FWHM of 3.3 for π-polarization 11.84 3.4 σ-polarization. emission ~1080 15 12.7 about 5.1 12.5 π- σ-polarization, fluorescence lifetime...
In recent years, many mobile payment (MP) schemes have been proposed and used in practise. However, a prerequisite for extended acceptance adoption of MP technologies is to deploy an effective system. So far, there no such standardised scalable platform. Most current are circumscribed by its network infrastructures. Fortunately, the fast advancement 3G technology equips next generation phone more benefits. Following this direction, we propose SIMPA - A SIP-based Mobile Payment Architecture...
Abstract Composite YAG /Nd:Lu AG transparent ceramics were fabricated by a thermal bonding process. The spatial distribution of ions around the original interface composite laser ceramic was investigated. Around interface, Lu 3+ and Y replaced with each other in dodecahedral symmetry sites. Results from X‐ray photoelectron spectroscopy ( XPS ) energy dispersive EDS quantitative chemical analyses positively show that distance diffused part is about 35 μm, while ions’ 5 μm. This corresponds to...
Low threshold and compact cw Nd:YVO4 self-Raman lasers at 1176 nm sum-frequency mixing of fundamental first-Stokes wavelengths are demonstrated. A 20-mm crystal is adopted in a plane-concave resonator. The results show that the Raman conversion sensitive to cavity length. At an incident pump power 22.5 W, output 1.53 W 1175.6 achieved, corresponding only 0.8 slop efficiency 8.1%. Intra-cavity generation realized type-II phase-matching cut KTP crystal, 480 mW 558.6 obtained 12 W.
The exceptional power scalability of Yb lasers has enabled the development pulsed optical parametric amplifiers (OPA's) operating at short-wave edge mid-IR (MIR) with average powers beyond 10 W simultaneously providing peak in excess 1 GW. Further wavelength extension into longer-wave MIR is by novel wide-bandgap non-oxide nonlinear crystals that can be pumped directly μm without detrimental one- and twophoton absorption pump radiation. Eliminating usual difference frequency generation step...