- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Quantum Information and Cryptography
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Quantum optics and atomic interactions
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
- Neurological Disease Mechanisms and Treatments
- Semiconductor Lasers and Optical Devices
- Quantum Mechanics and Applications
- RNA Interference and Gene Delivery
- Photorefractive and Nonlinear Optics
- Advanced Optical Imaging Technologies
- Neural Networks and Reservoir Computing
- Virtual Reality Applications and Impacts
- Quantum Computing Algorithms and Architecture
- Advanced Image and Video Retrieval Techniques
- Text and Document Classification Technologies
- Mechanical and Optical Resonators
- Advanced Text Analysis Techniques
- Hepatitis B Virus Studies
- Cybercrime and Law Enforcement Studies
- Data-Driven Disease Surveillance
- Advanced Vision and Imaging
Xijing Hospital
2025
Zhengzhou University of Light Industry
2019-2024
Xiyuan Hospital
2024
Dalian Municipal Central Hospital
2024
Dalian University of Technology
2024
Shanghai Medical College of Fudan University
2023-2024
Chinese Academy of Medical Sciences & Peking Union Medical College
2023-2024
George Mason University
2022
Tianjin University
2011-2021
Taiyuan University of Science and Technology
2021
A dual-wavelength bright-dark pulse pair has been experimentally demonstrated in a mode-locked fiber laser based on thulium-doped (TDF). By appropriately adjusting the polarization state, pairs with fundamental frequency of 20.56 MHz can be successfully obtained under pump power ranging from 150 to 500 mW. The largest energy is 2.84 nJ, and conversion efficiency exceeds 10%. generation mechanism cavity primarily attributed cross-phase modulation (XPM) induced by interaction bright soliton...
A passively switchable erbium-doped fiber laser based on alcohol as the saturable absorber (SA) has been demonstrated. The SA is prepared by filling gap between two optical patch cords with to form a sandwich structure. modulation depth of alcohol–SA measured be 6.4%. By appropriately adjusting pump power and polarization state in cavity, three kinds mode-locked pulse patterns can achieved switched, including bright pulse, bright/dark soliton pair, dark pulse. These different emissions all...
A passively mode-locked Er-doped fiber laser employing ethylene glycol as a saturable absorber (SA) has been proposed and experimentally validated. The glycol-SA is fabricated by filling the space between end facets of two optical patch cords inserted into cannula with glycol. Utilizing such an SA modulation depth 9.6 %, stable mode-locking operation are manifested in cavity, including production bright pulse bright-dark pair. generated center wavelength at 1562.28 nm, 3 dB bandwidth 0.21...
Abstract Accurate measurement of optical fiber dispersion is important for processing, such as communication, fiber-based quantum state generation, etc. In this paper, we propose a new method measuring, which can accurately measure the long fibers in wide spectral range. By using femtosecond laser and unbalanced Mach-Zehnder interferometer with phase-locking system, coherence length source stability has been improved. Thus, overcome shortcomings traditional methods that are difficult to be...
Several schemes are proposed to realize the conversion of photonic polarized-entangled Greenberger-Horne-Zeilinger state Knill-Laflamme-Milburn in decoherence-free subspace (DFS) via weak cross-Kerr nonlinearity and X-quadrature homodyne measurement with high fidelity. DFS is introduced decrease decoherence effect caused by coupling between system environment. Optimizations improve success rate utilization residual states further investigated. This study indicates important applications for...
Motivated by the pursuit of a simple system to produce continuous variable non-classical light source for long-distance quantum communication, we construct an all-fiber pulsed twin beams in 1550 nm band using high gain fiber optical parametric amplifier. The intensity-difference noise is below shot limit 3.1 dB (10.4 after correction losses). A detailed study reveals number limiting factors reduction. Therefore, further reduction will be feasible once care taken these factors.
We demonstrate the experimental generation of quadrature amplitude entanglement in 1550 nm band by using a fiber optical parametric amplifier. The measured noise variances difference and sum amplitudes pulsed signal idler twin beams fall below shot limit about 1 0.8 dB (4.2 3.6 after correction for efficiency), respectively, showing that inseparability criterion Einstein-Podolsky-Rosen I<2 is satisfied. Our investigation reveals quality can be further improved increasing transmission...
Abstract One of the important functions in a communication network is distribution information. It not problem to accomplish this classical system since information can be copied at will. However, challenges arise quantum because extra noise often added when content state distributed various users. Here, we experimentally demonstrate tap by using fiber optical parametric amplifier (FOPA) with correlated inputs, whose reduced destructive interference through entanglement between signal and...
By investigating the intensity correlation function, we study spectral/temporal mode properties of twin beams generated by pulse-pumped high gain spontaneous four wave mixing (SFWM) in optical fiber from both theoretical and experimental aspects.The results show that temporal property depends not only on phase matching condition filters applied signal idler fields, but also SFWM.When SFWM is low, are determined filtering usually multi-mode nature, which leads to a value larger than 1...
To solve the problems existing in research of scene recognition, this paper studies a new convolutional neural network target detection model to achieve better balance between accuracy and speed high-speed image recognition. First, aiming at problem that is easy be disturbed by impurities poor quality fine-grained preprocessing method based on Canny edge designed operator introduced process gray image. Second, L2 regularization algorithm used optimize basic framework network, enhance...
We theoretically investigate the quantum-noise properties of a pulse-pumped high-gain-fiber optical parametric amplifiers (FOPAs) by using Bogoliubov transformation in multiple frequency modes to describe evolution nondegenerate signal and idler twin beams. The results show that noise figure FOPA is generally greater than 3 dB quantum limit unless joint spectral function factorable spectrum input well matches gain band. However, intensity-difference beams, which weakly depends on function,...
We demonstrate that a phase-insensitive parametric amplifier, coupled to quantum correlated source, can be used as information tap for noiseless three-way signal splitting. find the output signals are amplified noiselessly in two of three ports while other more or less keep its original input size without adding noise. This scheme is able cascade and scales up efficient distribution an optical network. Furthermore, we this satisfies criteria non-ideal non-demolition (QND) measurement thus...
Hepatitis B virus (HBV) covalently closed circular DNA (cccDNA), the transcription template for all viral mRNAs, is highly stable and current treatment options cannot effectively induce its clearance. Previously, we established an HBV persistence mouse model based on a clinical isolate (termed BPS) identified interleukin-21 (IL-21) as potent inducer of Lipid nanoparticle (LNP) mediated delivery mRNA has proven to be safe effective platform. This work explored applicability effectiveness...
ABSTRACT Chronic infection with hepatitis B virus (HBV) remains an important public health challenge. Viral covalently closed circular DNA (cccDNA) persists in infected hepatocytes and serves as the template for transcribing all viral RNA species. HBV regulatory protein X (HBx) interacts other cellular proteins to play diverse functions life cycle, including modulation of cccDNA transcription activity. Here, we used proximity labeling coupled proteomic analysis screen HBx-interacting host...
Multimode squeezed states are essential resources in quantum information processing and metrology with continuous variables. Here we present the experimental generation of vacuum via degenerate four wave mixing realized by pumping a piece dispersion shifted fiber mode-locked ultrafast pulse trains. The noise fluctuation is lower than shot limit 1.1 ± 0.08 dB (1.95 0.17 after correction for detection losses). detailed investigation illustrates that results can be further improved suppressing...
In this paper, we propose a method to increase the field of view (FOV) in holographic display. Different from traditional method, large-sized computer-generated hologram (CGH) is generated, and function screen used proposed method. The CGH formed by superposition interference fringes. diffraction boundary angle interferogram set be equal maximum reconstructed light. reconstruction, three spatial light modulators (SLMs) arranged side linear configuration are load CGH. functional for...
Study in Literatures shows that tracing knowledge state of student is corner stone intelligent tutoring system for personalized learning. In this paper, an academic question recommender based on Bayesian network developed personalizing practice sequence with mastery level components. This discussed theoretical analysis, and designed implemented software engineering way. It provides instructor tools building component setting course. also makes personalize questions planned to deploy real...
We propose a simplified phase diversity method based on the first-order Taylor expansion of optical transfer function (OTF) as light intensity pupil plane is not uniform but presents Gaussian distribution. By extending Zernike polynomial term to complex field, we regard distribution imaginary part phase, which can be solved together with aberration (the real phase). The approximation OTF using simplify relationship between and linear relation, so that quickly solved. present an experiment...
Abstract In this paper, we propose a method to enlarge the field of view (FOV) in holographic display with speckle noise suppression. Different from traditional method, several subcomputer‐generated holograms (sub‐CGHs) large size are generated proposed method. Through pixel separation, recorded object is separated into multiple point groups. The information each group on different sub‐CGHs independent initial random phases. reconstruction, three spatial light modulators (SLMs) planar...