A5007298334- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Semiconductor Lasers and Optical Devices
- Laser-Matter Interactions and Applications
- Solid State Laser Technologies
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Semiconductor Quantum Structures and Devices
- Optical Network Technologies
- Laser Design and Applications
- Photorefractive and Nonlinear Optics
- Spectroscopy and Laser Applications
- Optical Wireless Communication Technologies
- Laser-Plasma Interactions and Diagnostics
- Energy, Environment, Economic Growth
- Ocular and Laser Science Research
- Underwater Vehicles and Communication Systems
- Advanced Frequency and Time Standards
- Optical Coatings and Gratings
- Diamond and Carbon-based Materials Research
- Photonic Crystals and Applications
- Extracellular vesicles in disease
- Advanced Fluorescence Microscopy Techniques
- Advanced Semiconductor Detectors and Materials
- Plasmonic and Surface Plasmon Research
Beijing University of Technology
2016-2025
Wuhan University
2024
Xingtai University
2023-2024
Capital University of Economics and Business
2024
Xingtai Medical College
2023-2024
Guiyang Medical University
2024
Affiliated Hospital of Guizhou Medical University
2024
Bank of China
2022
North China Electric Power University
2020
Yale University
2014
We demonstrated a high-repetition-rate Q-switched fiber laser with topological insulator Bi₂Se₃ absorber. The absorber was made into film structure by spin-coating method using few-layer nano-platelets which had regular shape. uniform low saturable optical intensity of 11 MW/cm(2), is the lowest in absorbers till now. By inserting an Erbium-doped laser, high-repetition repetition rates from 459 kHz to 940 achieved. maximum output power 22.35 mW shortest pulse duration 1.9 μs. To best our...
We demonstrated an all-normal-dispersion Yb-doped mode-locked fiber laser based on Bi₂Se₃ topological insulator (TI). Different from previous TI-mode-locked lasers in which TIs were mixed with film-forming agent, we used a special way to paste well-proportioned pure TI end-facet. In this way, the effect of agent could be removed, thus heat deposition was relieved and damage threshold improved. The modulation depth film measured 5.2%. When laser, mode locked pulses pulse energy 0.756 nJ,...
Liquid-phase exfoliation can be developed for the large-scale production of two-dimensional materials photonic applications. Although atomically thin 2D transition metal dichalcogenides (TMDs) show enhanced nonlinear optical properties or photoluminescence quantum yield relative to bulk phase, these are weak in absolute sense due ultrashort path, and they also sensitive layer-dependent symmetry properties. Another practical issue is that chemical stability some TMDs (e.g., Weyl semimetals)...
Based on mathematic simulations, the impact of spectral filtering pulse breaking up and noise-like generation in all-normal-dispersion fiber lasers are investigated. Three types spectrum filters employed which have a Gaussian-shaped profile, super-Gaussian-shaped sinusoidal-shaped respectively. With filter, breaking-up process is discussed. The filter two different formation mechanisms for pulses revealed. In addition, with dissipative solitons central wavelengths achieved.
We demonstrate a highly stable mode locked fiber laser based on single wall carbon nanotubes. The locking is achieved by the evanescent field interaction of propagating light with nanotube saturable absorber in microfiber. pulse width 66 fs, which, to best our knowledge, shortest laser. maximum average output power 26 mW, which about 20 times larger than that typical center wavelength 1555 nm, 54 nm spectral width. repetition rate 146 MHz. To investigate laser's stability, pulses are...
We demonstrated an all-normal-dispersion Yb-doped mode-locked fiber laser based on tungsten disulphide (WS2). The saturable absorbers (SA) were made by mixing WS2 solution with polyvinyl alcohol (PVA), and then evaporated a substrate. modulation depth of the film was 2.06% optical intensity 71.6 MW cm−2. When inserted into laser, pulses pulse width 2.5 ns repetition rate 2.84 MHz obtained. As pump power increased to 350 mW, maximum output measured be 8.02 mW. To best our knowledge, this is...
Abstract Background Extracellular vesicles (EVs) have been revealed to facilitate the development of oral squamous cavity cell carcinoma (OCSCC), while its supporting role in lymph node metastases is under continuous investigation. This study aimed examine function cancer-associated fibroblasts (CAF)-derived EVs (CAF-EVs) during metastasis OCSCC and mechanisms. Methods CAF were isolated from tissues patients, CAF-EVs extracted identified. EdU, colony formation, wound healing, Transwell...
Abstract Background Immune checkpoint inhibitors (ICIs) are commonly used in conjunction with chemotherapy to improve treatment outcomes for patients gastric cancer. Since AFP could influence immunity by both inhibiting natural killer (NK) cells and regulating negatively the function of dendritic cells, we evaluated baseline serum alpha-fetoprotein (AFP) levels on curative effect ICIs advanced cancer (AGC) patients. Methods A retrospective analysis was conducted 158 AGC who underwent ICI...
Advanced light sources in the blue-green band are crucial for underwater wireless optical communication (UWOC) systems. Vertical-external-cavity surface-emitting lasers (VECSELs) can produce high output power and good beam quality, making them suitable UWOC. This paper presents a 108 m distance UWOC based on 100 mW 490 nm blue VECSEL an acousto-optic modulator (AOM). The high-quality beam, which is near diffraction-limited, undergoes relatively small attenuation when using conventional...
We report a plasmonic diffraction grating device as new kind of optical polarizer. This simple consists periodically distributed gold nanowires on top transparent glass substrate and is based the strong polarization dependence particle plasmon resonance nanowires. A high-efficiency secondary in same enhances extinction ratio significantly. Linearly polarized spectrum red with bandwidth 53 nm selectively picked up from nonpolarized white light, where higher than 100 at about 650 has been...
We demonstrate a femtosecond erbium-doped fibre laser operating in the long wavelength band (L-band) which topological insulator Bi2Se3-polyvinyl alcohol film is applied as saturable absorber. It generates ~360 fs soliton pulse at 1600 nm with repetition rate of 35.45 MHz. To best our knowledge, this shortest duration ever achieved an L-band design employing Bi2Se3 The result shows could be promising candidate to generate ultrafast pulses for practical applications.
Conventional soliton (CS) and noise-like pulse (NLP) are two different kinds of regimes in ultrafast fiber lasers, which have many intense applications. In this article, we experimentally demonstrate that the regime an Er-doped laser could be converted between conventional by using fast response saturable absorbers (SA) made from layers single-wall carbon nanotubes (CNT). For monolayer (ML) CNT-SA, CS with duration 439 fs at 1560 nm is achieved while for bilayer (BL) CNT, NLP a 1.75 ps spike...
Spectral broadening is desirable in optical parametric oscillators (OPOs) for their tunability and generation of short pulses, which typically entails more complex systems increased costs. Here, we report large-scale spectral through the simple insertion a MoTe2 film into cavity femtosecond OPO first time. The offers tunable output ranging from 1245 to 1552 nm, comparable effects are observed most operating wavelengths. broadest spectrum achieved at 1524 nm by inserting low-concentration...
We report a core-pumped all-normal dispersion mode-locked Nd-doped fiber laser at 910 and 935 nm. The pulse is compressed to 198 fs, the energy 1.3 nJ. slope efficiency more than 14%. This tested as optical source for two-photon fluorescence imaging of pollen.
Abstract High-quality, ultrafast fiber lasers have long been favored by both research and industry for many desirable properties. Here, we present an Yb-doped laser system utilizing a directly spliced photonic crystal (PCF) to amplify seed source, 124 fs ultrashort pulses are obtained with average power of 6.55 W at repetition rate 100.15 MHz. This efficiently boosts dissipative soliton generated through nonlinear polarization rotation, achieving maximum output 8.37 W, corresponding slope...
Abstract An automatically mode-locked fiber laser based on the nonlinear polarization rotation(NPR) effect was demonstrated and a stable pulse train obtained. A model of parameters such as transmittance, self-phase modulation self-amplitude NPR established. The relationship between equivalent saturable absorption rotation angles waveplates analyzed. Using that, an automatic method hill-climbing algorithm built, output could be Output characteristics were discussed also.
InGaAs strained quantum wells (QWs) with GaAs, AlGaAs, and GaAsP barriers are widely used in optically pumped vertical-external-cavity surface-emitting lasers operating at 1 μm wavelength band. Compared the reported data, model-solid theory, which is more suitable for studied materials, selected to calculate band offset. The structures gain characteristics of three different QWs computed compared, theoretical results good agreement recent experimental reports. numerical simulation shows that...