A5101830870- Photorefractive and Nonlinear Optics
- Photonic and Optical Devices
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Photonic Crystals and Applications
- Microwave and Dielectric Measurement Techniques
- Nanowire Synthesis and Applications
- Semiconductor materials and devices
- Data Visualization and Analytics
- Microwave Imaging and Scattering Analysis
- Advanced Differential Equations and Dynamical Systems
- Transportation Planning and Optimization
- Acoustic Wave Resonator Technologies
- Hydrology and Watershed Management Studies
- Antenna Design and Analysis
- Advanced Decision-Making Techniques
- Soil erosion and sediment transport
- Structural Health Monitoring Techniques
- Fractional Differential Equations Solutions
- Perovskite Materials and Applications
- Laser Design and Applications
- Photonic Crystal and Fiber Optics
- Nonlinear Waves and Solitons
- Plasmonic and Surface Plasmon Research
Nanjing University
2023-2025
Laboratoire de physique des Solides
2025
National Laboratory of Solid State Microstructures
2025
Collaborative Innovation Center of Advanced Microstructures
2023-2024
Shangqiu Institute of Technology
2024
China Jiliang University
2023
Fuzhou University
2021
Jiangsu Normal University
2019-2020
South China University of Technology
2013
Thin-film lithium tantalate (TFLT) is attracting increasing attention in nonlinear generation of visible lasers due to its large second-order nonlinearity and reduced photorefractive effect. In this Letter, we design fabricate a periodically poled TFLT waveguide for frequency doubling near-infrared laser operating at around 1064 nm. Continuous-wave 1.87-mW second-harmonic green light was obtained from the waveguide, conversion efficiency about 11.7%. The exhibits narrow wavelength acceptance...
Simultaneous dual-wavelength laser oscillation of Tm:YLF at 1.9 and 2.3 µm were successfully realized. The three-mirror cavity was exploited to study performance, which is formed by a shared input mirror two independent output couplers for the wavelengths. Under an absorbed pump power 15.2 W, maximum CW powers 5.49 W around 1908nm 1.12 2305 nm simultaneously obtained, corresponding total optical-to-optical conversion efficiency 43.5%. A Cr2+:ZnSe further used passively Q-switch laser,...
Photonic devices based on ferroelectric domain engineering in thin film lithium niobate are key components for both classical and quantum information processing. Periodic poling of ridge waveguide can avoid the selective etching effect niobate, however, fabrication high-quality is still a challenge. In this work, we optimized applied electric field distribution, rectangular inverted structure was obtained which beneficial efficient nonlinear frequency conversions. Second harmonic confocal...
Periodically poled lithium tantalate on insulator (PPLTOI) was successfully fabricated by applying a high-voltage electric field. The shape of the electrode, which determines field distribution, as well poling time, and strength field, are investigated in detail for fabrication periodically LTOI. By optimizing parameters, duty cycle inverted domain can be flexibly adjusted controlled to optimal value 50%. Moreover, structure is uniform, standard deviation less than 4.8%. study presented this...
An algorithm is proposed to find out community structure and evaluate Hub road section in urban traffic network based on GN (Girvan Newman, 2004), namely GN-T algorithm. The involves iterative removals of links split into communities, which the removed are identified by "maximal between-value", remainders need be recalculated after each removal. improved modularity also presented determine appropriate numbers should divided. A case study Wuchang shows possesses characteristics structure,...
Spatiotemporal vortices (STOVs) are a new, to the best of our knowledge, type structured light in which optical phase circulates space-time. In this work, we propose generate STOVs via second harmonic generation lithium niobate nonlinear photonic crystals (NPCs) with linearly chirped Gaussian pulse as fundamental wave. The structural function NPC is derived by inverse design method. Numerical simulations intensity and profiles generated waves performed both amplitude-phase-modulated...
We demonstrated a high-peak-power orthogonally polarized multi-wavelength laser at 1.6-1.7 µm based on the intracavity cascaded nonlinear optical frequency conversion (CNOFC). This CNOFC can be characterized by configuration of "series-parallel circuit", where OPO pumped Raman operates in "series-mode" and orthogonally-polarized waves are simultaneously converted "parallel-mode". The fundamental wave 1064 nm was first to 1534 1572 x-cut KTA KTP parametric oscillation (OPO), respectively....
We report an efficient and novel method for generating high-peak-power 1.7 µm laser pulses by cascaded optical parametric oscillation (OPO) stimulated Raman scattering (SRS). The 1064 nm fundamental wave was first converted to 1535 the KTA OPO, further extended a SRS process. configuration of OPO + can provide high-intensity pumping light subsequent conversion, allows better wavelength expansibility benefitting from non-phase-matching requirement SRS. Two types conversion using low-frequency...
To obtain high performance optoelectronic devices, ferroelectric materials have received a lot of attention due to the various emerging effects on channel induced by polarization. In this work, special photodetector with material triple-layer MoS 2 polarized LiNbO 3 substrate was fabricated. The device has responsivity 113.1[Formula: see text]A/W and specific detectivity up [Formula: text] Jones under red illumination, while maintaining rise fall time 32 22[Formula: text]ms, respectively....
In this article, the potential Kadomtsev-Petviashvili (pKP) type coupled system with variable coefficients is studied, which have many applications in wave phenomena and soliton interactions a two-dimensional space time. framework, Hirota bilinear form applied to acquire diverse types of interaction lump solutions from foresaid equation. Abundant lump, lump-periodic, lump-soliton multi pKP are presented by mixture exponentials trigonometric functions. Lump, studied usage symbolic...
Motivation: High permittivity metamaterials have shown benefits in UHF MRI. However, precise dielectric constant measurement method for is absence, which may lead to bias field manipulation. Goal(s): Developing a better mimicking materials’ role manipulation, where samples are placed at the reactive near-field region. Approach: A microstrip line resonator was used measure resonances of metamaterials. The resonance materials with particular properties were chosen as reference. Their...
We demonstrated high-peak-power 786 nm and 452 lasers based on 1064 intracavity-driven cascaded nonlinear optical frequency conversion (CNOFC). The fundamental wave generated from the LD-side-pumped Nd:YAG was first intracavity converted to 1572 by a noncritically phase-matched KTP OPO. Then LBO-based second harmonic generation of served as process produce laser radiation. maximum average output power at 1.34 W, corresponding pulse peak 14.2 kW with 11.2 ns width 8 kHz repetition rate....
Landslides are a common natural disaster, often causing severe damage to people's lives and property. It is, therefore, necessary monitor the three-dimensional underground displacement in geological hazard monitoring. The device uses dual reciprocal voltage method infer subsurface displacements based on principle of electromagnetic mutual inductance. In this dissertation, horizontal vertical studied, inductance one, two, tilt angle used as input parameters. radial basis neural network is...