A5049675673- Optical Wireless Communication Technologies
- Optical Network Technologies
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Advanced biosensing and bioanalysis techniques
- Adaptive optics and wavefront sensing
- Optical Coherence Tomography Applications
- Ocular and Laser Science Research
- Random lasers and scattering media
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Particle Accelerators and Free-Electron Lasers
- Radio Wave Propagation Studies
- Advanced X-ray Imaging Techniques
- Advanced Optical Imaging Technologies
- Orbital Angular Momentum in Optics
- MXene and MAX Phase Materials
- Satellite Communication Systems
- Quantum Information and Cryptography
- Electrochemical Analysis and Applications
- Reinforcement Learning in Robotics
- Robotic Path Planning Algorithms
- Quantum Dots Synthesis And Properties
- Neural Networks and Reservoir Computing
Beijing Institute of Optoelectronic Technology
2022-2024
Beijing Institute of Technology
2021-2024
Changchun University of Science and Technology
2018-2024
Anhui University of Technology
2023-2024
Chinese Academy of Sciences
2013-2023
East China University of Science and Technology
2023
Changchun Institute of Optics, Fine Mechanics and Physics
2023
Nanjing University of Posts and Telecommunications
2022
China University of Mining and Technology
2020-2021
Anhui University
2016
Atmospheric turbulence disturbance degrades the quality of long-range image transmission in applications such as marine monitoring and satellite imaging. Simulating an atmospheric dataset facilitates correction turbulence-distorted images. However, current simulation algorithms suffer from long computation times, undersampling frequency, unrealistic simulation. Therefore, we propose algorithm based on coherence length r0 associated with phase structure function for fast, high-precision,...
Removal of residual linear energy chirp and intrinsic nonlinear curvature in the relativistic electron beam from radiofrequency accelerator is paramount importance for efficient lasing a high-gain free-electron laser. Recently, it was theoretically experimentally demonstrated that longitudinal wakefield excited by electrons itself corrugated structure allows precise control phase space. In this Letter, we report first utilization as linearizer operation seeded laser driven 140 MeV...
We characterize the performance of optical signal propagation model multi-level pulse amplitude modulation (M-PAM) based on avalanche photodiode (APD) detector in free-space link for first time. When number photons absorbed by active surface APD is large enough, bit error rate (BER) relationship systems intensity and photon characteristics are depicted. use Gamma-Gamma (G-G) channel to analysis communication with joint parameter constraints, demonstrate atmospheric turbulence intensity,...
We report on a communication link demonstration in 1 km simulated atmospheric turbulent channel with wide-spectral mode-locking fiber laser. Wide-spectral beams are part of the supercontinuum, which is generated from pumping dispersion-shifted by an active mode-locked In addition, propagation effects were investigated experimentally atmosphere channel. The characteristics bit error rate and eye pattern before after turbulence analyzed, respectively. experimental results showed that...
Ghost imaging (GI) has been widely used in the applications including spectral imaging, 3D and other fields due to its advantages of broad spectrum anti-interference. Nevertheless, restricted sampling efficiency ghost impeded extensive application. In this work, we propose a novel foveated pattern affine transformer method based on deep learning for efficient GI. This enables adaptive selection region interest (ROI) by combining proposed retina (RAT) network with minimal computational...
A scheme for separating optical precursors from a square-modulated laser pulse through an asymmetric double ${\mathrm{Al}}_{x}{\mathrm{Ga}}_{1\ensuremath{-}x}$As/GaAs quantum-well structure via resonant tunneling is proposed. Destructive interference inhibits linear absorption, and tunneling-induced transparency (TIT) window appears with normal dispersion, which delays the main pulse; then are obtained. Due to tunneling, constructive nonlinear susceptibility created. The enhanced dispersion...
A 128 Gbit/s free-space laser link demonstration has been presented.We use a simulated atmosphere system with tunable 1 km equivalent weak turbulence channel.Eye diagrams and constellation were observed.Bit error rate curves of back to transmission that in atmospheric channel are measured.The results show the receiving sensitivities can be better than -37.3 dBm at channel.To best our knowledge, it is first time performance high speed space studied.
Abstract Free space optical communication with infrared light is a promising secure wireless technology, where photodetectors are the core component. To date, such applications based on epitaxial growth narrow‐band semiconductors facing challenge of large‐area fabrication. Infrared colloidal quantum dots (CQDs) interest because high‐throughput solution processing. Here, CQD adjustable wavelengths covering 1.3–2.0 µm. For 1 × mm 2 photodetector, response time achieved within µs at room...
Article Mechanism of Bifurcation-Dependent Coherence Resonance an Excitable Neuron Model was published on December 1, 2006 in the journal International Journal Nonlinear Sciences and Numerical Simulation (volume 7, issue 4).
In order to better evaluate the relationship between reciprocity and time delay of fiber receiving system in atmospheric turbulence channel, a time-domain signal generation mathematical model is proposed for first time. A numerical solution Johnson SB probability density distribution (PDF) creatively given evaluating both communication ends, which relates normalized fluctuation variance light intensity Greenwood frequency. An experiment then carried out verifying measuring reciprocity. It...
An average bit error ratio (ABER) performance model for multiple phase shift keying (MPSK) based on a balanced detector with fiber is presented in the free-space link first time. The Johnson SB probability distribution function (pdf), to best of our knowledge, experimentally explored, which can be used describe fading characteristics an optical signal coupled into single-mode (SMF) atmospheric turbulence channel. Subsequently, ABER expression established by combining photon fiber. numerical...
Adaptive free-space optical (FSO) communication links have been extensively studied in order to adapt variable atmospheric channel environments due factors such as turbulence. As a supporting technology, an all-in-one BPSK/QPSK switchable transmission and reception method is proposed experimentally demonstrated for adaptive modulation format switching FSO links. The of both formats are realized based on the same IQ modulator single-photodetector coherent receiver. Simulation experimental...
One of the major restrictions free-space optical communication systems is limitation single-mode fiber (SMF) coupling efficiency that impacts system performance. In this paper, an adaptive method for based on coarse-fine laser nutation technique was presented. The scanning strategy and algorithm were set up experimentally examined. experimental results demonstrate capable achieving a good even beam spot SMF do not coincide with each other at start. center calculation accuracy coarse fine...
The data transmission between 5G floating base stations will be an important application area of the free space optical (FSO) link, but problem atmospheric disturbance directly affect effect. An turbulence suppression algorithm based on avalanche photodiode adaptive gain control (APDAGC) for laser terminal was proposed to suppress turbulence. given design mechanism and experimental results demonstrate its function improve performance FSO. When APDAGC is over 1 km FSO, variance intensity...
The application of reinforcement learning algorithms to motion planning is a research hotspot in robotics recent years. However, training agents from scratch has low efficiency and difficulty convergence. In this paper, robot method based on residual proposed. This divides the agent's policy into initial policy. composed neural network planner responsible for guiding direction Proximal Policy Optimization (PPO) algorithm learning. A experiment carried out simulation environment, result shows...
Abstract In massive multiple-input multiple-output (MIMO) systems with single- antenna user equipment (SAUE) or multiple-antenna (MAUE), the increase of number received antennas at base station, complexity traditional detectors is also increasing. order to reduce high parallel running Gauss-Seidel iterative method, this paper proposes a model-driven deep learning detector network, namely Block Network (BGS-Net), which based on method. We by converting large matrix inversion small inversions....