A5101522167- Laser Material Processing Techniques
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Photonic and Optical Devices
- Solid State Laser Technologies
- Laser-Matter Interactions and Applications
- Advanced Measurement and Metrology Techniques
- Photonic Crystals and Applications
- Advanced Fiber Optic Sensors
- Optical Systems and Laser Technology
- Photonic Crystal and Fiber Optics
- Optical measurement and interference techniques
- Surface Roughness and Optical Measurements
- Orbital Angular Momentum in Optics
- 3D Shape Modeling and Analysis
- Laser-Plasma Interactions and Diagnostics
- Advanced Surface Polishing Techniques
- Mechanical and Optical Resonators
- Optical Coherence Tomography Applications
- Bacteriophages and microbial interactions
- Silicon Nanostructures and Photoluminescence
- Photoacoustic and Ultrasonic Imaging
- Nonlinear Optical Materials Studies
- Astronomical Observations and Instrumentation
- Terahertz technology and applications
State Key Laboratory of Crystal Materials
2018-2025
Shandong University
2018-2025
Massachusetts Institute of Technology
2025
Civil Aviation University of China
2019-2024
Sun Yat-sen University
2022-2024
Xi'an Polytechnic University
2022-2024
National University of Defense Technology
2011-2024
Ningxia Medical University
2023
Nanjing Tech University
2022
Sichuan University
2001-2021
Based on the extended Huygens-Fresnel principle, propagation law of beam matrix in terms second moments Wigner distribution function for partially coherent beams propagating through atmospheric turbulence was obtained. The general formulas mean-squared spatial and angular widths, as well factor (M(2) factor) were also derived, which can be applied to cases different power spectra refractive index fluctuations turbulent atmosphere.
The analytical expressions for the cross-spectral density and average intensity of Gaussian Schell-model (GSM) vortex beams propagating through oceanic turbulence are obtained by using extended Huygens-Fresnel principle spatial power spectrum refractive index ocean water. evolution behavior GSM is studied in detail numerical simulation. It shown that coherent vortices depends on including rate dissipation turbulent kinetic energy per unit mass fluid, mean-square temperature, relative...
Abstract Femtosecond laser pulses have been extensively employed to achieve 3D micro‐ and nanofabrication in various materials for a broad variety of applications. LiNbO 3 crystal is multifunctional material due its combination number excellent properties. By using femtosecond direct writing, structures fabricated crystals based on the refractive index changes, surface morphology modifications, or domain realize intriguing applications integrated photonics. Herein, state‐of‐the‐art review...
In 2017, the American College of Cardiology (ACC)/American Heart Association (AHA) released a new hypertension guideline for nonpregnant adults, using lower blood pressure values to identify hypertension. However, impact this on diagnosis gestational and associated maternal neonatal risks are unknown. To estimate adopting 2017 ACC/AHA detecting elevations relationship with risk in perinatal period retrospective cohort design. This study included 16 345 women from China. Systolic diastolic...
Telecom-band-integrated quantum memory is an elementary building block for developing networks compatible with fiber communication infrastructures. Toward such a network large capacity, integrated multimode photonic at telecom band has yet been demonstrated. Here, we report fiber-integrated storage of single photon on laser-written chip. The device fiber-pigtailed Er3+:LiNbO3 waveguide and allows up to 330 temporal modes heralded 4-GHz-wide bandwidth 1532 nm 167-fold increasing coincidence...
We present experimental observations of topological edge states in photonic bilayer Su–Schrieffer–Heeger (SSH) lattices. Using the femtosecond laser direct writing technology, we establish two distinct types nontrivial SSH lattices with varying interlayer couplings, allowing us to observe different states. Interestingly, find that these can either remain within bandgap or transition into gapless bound continuum without hybridization under couplings. Our work illustrates a scheme investigate...
We experimentally show that the generation and erasure of femtosecond laser-induced periodic surface structures on nanoparticle-covered silicon inducted by irradiation with a single laser pulse (800 nm, 120 fs, linear polarization) depend fluence. propose this is due to competition between structuring originating from interference incident light plasmon polaritons smoothing associated melting. Experimental results are supported theoretical analysis transient modifications based combining...
We report on optical waveguides produced by a femtosecond laser in 6H–SiC crystals. Their guiding properties have been investigated at wavelength of 1064 nm, and confocal micro-Raman images obtained an excitation 532 nm. The results demonstrate that mode profiles can be tailored the adjustment writing parameters, blueshift spectrum (at around 787.05 cm−1) mainly takes place irradiated areas. From Raman intensity spectral shift, it is obvious regions are well preserved. These may potential...
Abstract Topological photonics attract significant interests due to their intriguing fundamental physics and potential applications. Researchers are actively exploring various artificial platforms realize novel topological phenomena, which provides promising pathways for the development of robust photonic devices. Among these platforms, femtosecond laser direct-written waveguides show unique ability visualize intricate light dynamics in 2 + 1 dimensions, rendering them ideal tools...
We report a novel mode modulator based on KTN crystal waveguide produced by femtosecond laser (fs-laser) writing. The is typical dual-line structure that depends the decrease of refractive index at focus area. propagation loss along TE polarization as low ~0.9 dB/cm 632.8 nm. investigation confocal micro-Raman spectra reveals microstructure region has no obvious change during direct writing (FsLDW) procedure. Under applied current (DC) electric field, modes in guiding can be modulated,...
Dynamic fluorescence diffuse optical tomography (FDOT) is important for the research of drug delivery, medical diagnosis and treatment. Conventionally, dynamic tomographic images are reconstructed frame by frame, independently. This approach fails to account temporal correlations in measurement data. Ideally, entire image sequence should be considered as a whole four-dimensional (4-D) reconstruction performed. However, fully 4-D computationally intensive. In this paper, we propose new FDOT,...
We report on a one-step fabrication method of horizontal dual-line waveguides supporting TE guidance in LiTaO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> crystal utilizing multiple refocusing mechanisms the femtosecond laser. Through nonlinear process, foci can be formed spontaneously with interval few micrometers along laser propagation direction. The number and separation focal spots, even entire length laser-induced tracks, could...
Spring Outing Painting of Madam Guo is one the representative works Zhang Xuan, a famous Chinese court painter Tang dynasty (618–907), who was “leader” trend figure painting in and had great influence on later painting. The costumes characters paintings not only show artistic aesthetics prosperous dynasty, but also reflect rich cultural connotation. At present, research this mainly about character discrimination appreciation. There are few studies involving With rapid development digital...
Costume restoration is one of the important ways to study costume history and culture. The purpose this paper show characteristics Chinese costumes more than 1000 years ago, through research on in famous ancient painting DaoLian painting, provide strong technical support for work Xuan Zhang, a painter Tang dynasty (618–907), China. From perspective clothing engineering, we analyzed style, color, pattern used virtual fitting technology realize digital 12 characters painting. results that it...
We report on a novel waveguide-based polarization beam splitter (PBS) fabricated by femtosecond (fs) laser in lithium niobate (LiNbO3) crystals. This monolithic PBS is composed of tailored waveguide configurations with different guiding properties which linearly polarized light along extraordinary refractive index (ne) and ordinary (no) can be well separated. At the wavelength 1064 nm, extinction ratio (PER) reach to 16.60 dB 16.18 for ne no polarizations, insertion loss (IL) 3.86 4.15...