A5022714320- Optical Network Technologies
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Topic Modeling
- Photorefractive and Nonlinear Optics
- High-Voltage Power Transmission Systems
- Advanced Fiber Optic Sensors
- Advanced Graph Neural Networks
- High voltage insulation and dielectric phenomena
- Solid State Laser Technologies
- Optical and Acousto-Optic Technologies
- Magnetic Field Sensors Techniques
- Advanced Fiber Laser Technologies
- Data Quality and Management
- Ferroelectric and Negative Capacitance Devices
- Semiconductor materials and devices
- Optical Coatings and Gratings
- MXene and MAX Phase Materials
- Laser Design and Applications
- Complex Network Analysis Techniques
Central South University
2024
North China Research Institute of Electro-optics
2018
Chinese Academy of Sciences
2012-2014
Beijing University of Posts and Telecommunications
2012-2013
Institute of Semiconductors
2012
HfO2-based ferroelectric films have been extensively explored and utilized in the field of non-volatile memory electrical programmability. However, trade-off between polarization dielectric constant HfO2 has limited overall performance improvement devices practical applications. Herein, a novel approach is proposed for Hf0.5Zr0.5O2/ZrO2 (HZO/ZrO2) nanobilayer engineering, which can effectively regulate phase structure evolution to construct suitable morphotropic boundary (MPB). The findings...
This letter proposes a scheme for the format conversion of on-off keying (OOK) signal to quadrature phase-shift (QPSK) and 16-ary amplitude modulation (16QAM) signals via cross-phase (XPM) in semiconductor optical amplifier (SOA).Theoretical experimental analyses are conducted validate its feasibility.The phase changing is obtained because XPM SOA.The QPSK 16QAM converted from OOK signal.The performance 10 Gb/s system evaluated discussed.The receiver sensitivities after detection -27.25...
Pulse position modulation (PPM) is introduced downstream of the reflective semiconductor optical amplifier (RSOA)-based single-fiber full-duplex bidirectional wavelength division multiplex passive network (WDM PON) to suppress interference brought by remodulation effect in RSOA, Rayleigh backscattering, and reflection connection devices.In addition, because powerefficient characteristic PPM-encoded signals, power budget shows clear improvement.As experimental tests indicate, with ∼6 dB...
We demonstrate a high-efficiency and high-power quasi-three-level laser based on trapezoidal composite slab architecture with 270 μm-thick Yb-doping surface. The design of surface-doped architecture, temperature effects, oscillator model, experiments as host medium have been presented. By theoretical calculation, the rise in is only one seventh that bulk-doped at same maximum pump power 30 kW. Finally, experiments, an output energy 21.6 J obtained when 48 repetition rate 5 Hz pulse width 1...
We propose a polarization-insensitive and broadband subwavelength grating reflector based on multilayer structure.The has an overlapped high reflectivity (>99.5%)bandwidth of 248 nm between the TE TM polarizations, which is much higher than previously reported results.We believe this can be applied to unpolarized devices.
GaInAs/AlGaAs comprehensive-strained three-quantum-well lasers with asymmetric waveguide are designed and optimized.With this design, the optical field in transverse direction is extended, a semiconductor laser large spot obtained.For 300-µm cavity length 100-µm aperture device under continuous wave (CW) operation, measured vertical horizontal far-field divergence angles 12.2 • 3.0 , respectively.The slope efficiency 0.44 W/A lasing wavelength 917 nm.The equivalent size 3 µm for fundamental...
A scheme that utilizes the 4-level pulse-amplitude-modulated (4PAM) signal as re-modulated of colorless optical network units (ONUs) based on reflection semiconductor amplifiers (RSOAs) is proposed.The system with 10-Gb/s non-return-to-zero (NRZ) downstream and 5-Gb/s 4PAM upstream signals theoretically analyzed experimentally verified.Simulation experimental results reveal yields better performance than NRZ in upstream.A receiver power penalty 1.6 dB also improved by at back-to-back (BtB)...
Electromagnetic environment(EME) is one of the key issues during ultra-high voltage direct current power transmission projects. The analysis methods electromagnetic environment data and influence line configuration, voltages applied climatic parameters should be clearly studied. This paper presents monitoring measuring platform EME in National Key Laboratory UHV Technology. Because burst interference occurring test environment, there are always outliers sheet. So this cleaning method has...
We report the dark blue nonlinear Čerenkov radiation by second harmonic generation (SHG) in a two-layer-stacked hexagonal periodically-poled-MgO: LiNbO3s (PPMgOLNs).Based on direct wafer bonding of two target PPMgOLNs rotating around axis perpendicular to plane with an angle 30 • , twelve bright spots as twice those single PPMgOLN are shown at each second-harmonic ring.The experimental results agree theoretical ones and present promising application fabrication three-dimensional (3D) PPMgOLNs.
Measuring electric field has a very wide range of applications in the power system, but for ion under HVDC transmission lines, current measurements are insufficient. In this paper, effects interventional measurement, theoretical analysis, measuring programs researched. Sensors Poisson sense an Ein, which consists three parts. E0 is origin field, E1 indicates generated by charges attached on sensor, E2 represents influence redistribution flow after sensor put into field. Based multi-physics...