A5100622933- Random lasers and scattering media
- Advanced Optical Imaging Technologies
- Digital Holography and Microscopy
- Orbital Angular Momentum in Optics
- Arctic and Antarctic ice dynamics
- Advanced Fiber Laser Technologies
- Advanced Optical Sensing Technologies
- Sparse and Compressive Sensing Techniques
- Neural Networks and Reservoir Computing
- Optical Coherence Tomography Applications
- Methane Hydrates and Related Phenomena
- Radiation Detection and Scintillator Technologies
- Advanced Fluorescence Microscopy Techniques
- Atomic and Subatomic Physics Research
- Photonic Crystal and Fiber Optics
- Advanced Measurement and Detection Methods
- Geological Studies and Exploration
- Medical Imaging Techniques and Applications
- Microwave Imaging and Scattering Analysis
- Image Enhancement Techniques
- Underwater Acoustics Research
- Plant Micronutrient Interactions and Effects
- Laser-Plasma Interactions and Diagnostics
- Surface Roughness and Optical Measurements
- Ocean Waves and Remote Sensing
Taiyuan University of Technology
2005-2024
National University of Defense Technology
2020-2022
Binzhou University
2020
Nanjing University
2019
Nankai University
2015
Helmut Schmidt University
2010-2013
We report an intermediate regime between c.w. emission and noise-like pulses (NLPs) in Er-doped partially mode-locked fiber laser with nonlinear polarization rotation. In this regime, the soliton bunches stochastically turn up from a quasi-cw background Q-switched-like envelope. The normally last for tens or hundreds of intracavity round-trips. When vanish, typical NLPs chains are generated sporadically at location where collapses. These results would be helpful to understand generation...
Utilizing a complex-number basis for single-pixel imaging (SPI) spatial wavefront in high quality is still an open issue. To solve this issue, here, we proposed method called OAM-basis (WSPI) via compressed sensing (CS) reconstructing quality. In there, generate the orbital angular momentum (OAM) beams as measurement, and propose to use TVAL3 CS algorithm reconstruction, first time best of our knowledge. The reconstruction appropriate WSPI using basis. Both simulations experiments show that...
Noninvasive imaging through scattering media using memory effect (ME) normally suffers from the failure of when object is beyond ME region, limiting its field view (FOV). Herein, a method to enlarge FOV proposed by utilizing point‐spread‐function (PSF) estimations and correlations. For first time, best knowledge, it successfully demonstrated that whole or multiple objects with right relative positions orientations, although they are can be noninvasively well reconstructed method, which...
For an orthogonal transform based single-pixel imaging (OT-SPI), to accelerate its speed while degrading as little possible of quality, the normal way is artificially plan sampling path for optimizing strategy on characteristic transform. Here, we propose optimized method using a Deep Q-learning Network (DQN), which considers process decision-making, and improvement reconstructed image feedback, obtain relatively optimal OT-SPI. We verify effectiveness through simulations experiments. Thanks...
Single-pixel detecting is suitable for wavefront reconstruction in some special wavelengths where array detectors are immature or even unavailable and/or under low light conditions. However, most of the demonstrations generally realized by multi-step phase-shifting interferometry with a liquid crystal spatial modulator (LC-SLM) that has slow modulation speed, which limits thus restricting practical applications technique. Here, we propose to use digital-micromirror-device-(DMD)-based...
The transmission matrix (TM) is a powerful tool for focusing light through scattering media. Here, we demonstrate Bessel-basis TM that enables tight the media and reduces full width at half maximum of focus by 23% on average, as compared to normally used Hadamard-basis TM. To measure TM, establish common-path inter-mode interferometer (IMI), which can fully utilize pixels spatial modulator, leading an enhancement in peak-to-background intensity ratio (PBR) focus. Experimental results suggest...
A transmission matrix (TM) is a powerful tool for light focusing and imaging through scattering media. For measuring it, the normal way requires establishing multiple-step phase-shifting interferometer, which makes TM measurement not only complex sensitive but also time-consuming. Imaging media using an intensity method can make setup without thus it much simple, more stable, several times faster. Here, based upon differential method, we demonstrated to do different Hadamard orderings. To...
One of the main challenges in wavefront shaping technique is to enable controllable light propagation through scattering media. However, scanning focus generated by limited a small range determined optical memory effect (ME). Here, we propose and demonstrate efficiently behind media beyond ME region using tilting re-optimization (WFT&RO) method. After an initial desired position tilting, our approach utilizes scanned at new as "guide star" do re-optimization, which can not only enhance...
Inspired by the unique internal structures with inherent anisotropy in biological tissues and their dynamic scattering characteristic, a simple easy-to-fabricate optical encryption technique using structural uncorrelated characteristics of was proposed. It can generate keys random transforms multiple image plaintexts into speckle-like ciphertexts. The encryptions grayscale images are demonstrated utilizing shallot chicken breast respectively. Ciphertext-only-attack is resisted phase...
Abstract Reanalysis data and a numerical model are employed to explore how diffusion in the upper ocean evolves different seasons understand its contribution seasonal heat storage (SHS) Arctic amplification. The simulation results closely consistent with observations. First, solar radiation absorption anomaly (maximum June) due ice‐loss is mainly stored as SHS June July) or warms surface (minimum Furthermore, suggests that vertical dominates formation/discharge. Second, becomes warmer than...
As a category-3 typhoon, Hato (2017) experienced the notable rapid intensification (RI) over hot sea surface before its landfall. The RI process and influences of local temperature (SST) patterns on evolution were well captured carefully investigated using high-resolution air–sea coupled model. To further explore close relationship between radial distributions SST storm evolution, sensitive experiment with time-fixed was also performed. Results showed that produced earlier following core...
In this work, a sulfur and nitrogen co-doping technique has been demonstrated for diamond epilayer growth by microwave plasma chemical vapor deposition (MPCVD). Results show that the concentration in films could be tailored of sulfur. At certain condition, single nitrogen-vacancy (NV) colour centers achieved. A competition mechanism between incorporation H2/CH4 is proposed to explain efficient suppression incorporated nitrogen. Briefly, adding H2S decreases rate resulting (S or S2) species...
In the 2009 sessions a laser based imaging system for geometrical measurement of projectile trajectories was presented. This has been extended to be able gather 3D data. Therefore mathematical baseline is given and errors are estimated. An approach shown how direction trajectories' origin could ascertained using current system. A simulation software developed emulate test firings measurements under certain assumptions different configurations. As first step, simulations on sensor grid error...
In measuring a transmission matrix (TM) of scattering medium, the normal way requires projecting large number patterns, resulting in significant measurement time. Here, we propose to do imaging through media using path-planning-based downsampling TM. The proposed method is verified by TMs for when Walsh, Cake-cutting, and Russian doll Hadamard transforms (HTs) are adopted. Based on spectral characteristics different HTs natural images, corresponding sampling paths artificially planned, which...