A5103277636- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Laser-Matter Interactions and Applications
- Solid State Laser Technologies
- Advanced Fiber Optic Sensors
- Astro and Planetary Science
- Space Satellite Systems and Control
- Infrared Target Detection Methodologies
- Optical Network Technologies
- Optical Systems and Laser Technology
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Nonlinear Optical Materials Studies
- Advanced Measurement and Detection Methods
- Adaptive optics and wavefront sensing
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Advanced battery technologies research
- Advanced Optical Sensing Technologies
- GNSS positioning and interference
- Graph theory and applications
- Advanced Image and Video Retrieval Techniques
- Image and Object Detection Techniques
- Inertial Sensor and Navigation
National Astronomical Observatories
2017-2025
Chinese Academy of Sciences
2016-2025
Changchun Observatory
2016-2025
University of Chinese Academy of Sciences
2022-2024
State Key Laboratory on Integrated Optoelectronics
2012-2023
Jilin University
2012-2023
Guangxi University
2021-2023
Wuhan University of Technology
2023
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
2018-2019
Jilin Medical University
2014-2019
MXenes, or transition metal carbides nitrides, as an advanced 2D materials have already attracted extensive attention due to their high conductivity and large specific surface area for applications in the field of energy storage. MXenes also many other properties such good transmittance adjustable work function over a range. However, few works study optoelectronics. Here, optoelectronic Ti 3 C 2 T X (with 4.37 eV) on n‐type silicon (n‐Si) vertical van der Waals heterostructures are studied....
Passive Q-switching was experimentally demonstrated in an erbium-doped fiber laser (EDFL) by using gold nanocrystals (GNCs). The GNCs were mixed with sodium carboxymethylcellulose (NaCMC) to form GNCs-NaCMC films. films exhibited a broad absorption band the range of 400–1750 nm. By placing film EDFL cavity pumped 980 nm diode, stable passive achieved for threshold pump power ∼30 mW, and 3.2 μs pulses at 1560 repetition rate 24.2 kHz obtained ∼125 mW.
We demonstrated a passively mode-locked erbium-doped fiber laser by using gold nanorods as saturable absorber. The (GNRs) were mixed with sodium carboxymethylcellulose (NaCMC) to form GNRs-NaCMC films. By inserting one of the films into an EDFL cavity pumped 980 nm diode, stable mode-locking was achieved threshold pump power ∼54 mW, and 12 ps pulses at 1561 repetition rate 34.7 MHz maximum average ∼2.05 mW obtained for ∼62 mW.
A new type of saturable absorber (SA) based on gold nanorods (GNRs) for all-fiber passively Q-switched erbium-doped fiber laser (EDFL) is realized experimentally. The longitudinal surface plasmon resonance (SPR) absorption GNRs used to induce Q-switching. By inserting the SA in an EDFL cavity pumped by a 980 nm diode, stable passive Q-switching achieved with threshold pump power ~27 mW, and 4.8 μs pulses at 1560 repetition rate 39.9 kHz are obtained ~275 mW.
Importance Trials have not demonstrated superiority of alteplase or tenecteplase vs standard care in patients with mild stroke and raised safety concerns. Prourokinase is an alternative fibrinolytic that may a favorable profile, the benefit-risk profile prourokinase unknown. Objective To investigate efficacy ischemic within 4.5 hours symptom onset. Design, Setting, Participants This was multicenter, prospective, open-label, blinded–end point randomized clinical trial conducted from November...
Gold nanorods (GNRs) were used as a saturable absorber (SA) for passive mode-locking at 1 μm wavelength. The GNR-SA film was fabricated by mixing GNRs with sodium carboxymethylcellulose. longitudinal surface plasmon resonance absorption of to induce mode-locking. By using the film, stable 1039 nm experimentally demonstrated in an ytterbium-doped fiber laser cavity pumped 980 diode. produced ~440 ps pulses repetition rate 36.6 MHz and average output power ~1.25 mW pump ~82 mW.
We demonstrated a passively mode-locked fiber laser operating at 1982 nm by using gold nanorods (GNRs) saturable absorber (SA). The GNRs SA was fabricated mixing with sodium carbonxymethyl cellulose. By inserting the into Tm-doped cavity pumped 1570 laser, stable mode-locking achieved threshold pump power of 224 mW, ~4.02 ps pulses repetition rate ~37.49 MHz, and maximum average ~6 mW obtained for ~265 mW.
In this paper, we propose and demonstrate an all-fiber passively Q-switched erbium doped fiber laser (EDFL) by using gold nanostars (GNSs) as a saturable absorber (SA) for the first time, to best of our knowledge. comparison with other nanomorphologies, GNSs have multiple localized surface plasmon resonances, which means that they can be used construct wideband ultrafast pulse lasers. By inserting GNS SA into EDFL cavity pumped 980 nm diode, stable at 1564.5 nm was achieved threshold pump...
We demonstrated passively mode-locked ytterbium and erbium doped fiber lasers operating at 1039 1560 nm by using a common gold nanorods (GNRs) saturable absorber (SA). The GNRs with designed aspect ratios were mixed sodium carboxymethylcelluose to form the SA film. film had broadband longitudinal SPR (surface plasmon resonance) absorption from 800 1800 nm. By inserting same into or laser cavity pumped 980 diode, stable operation was achieved for threshold pump power of ~100 ~70 mW,...
We propose and demonstrate a widely tunable passively Q-switched Ho3+/Pr3+-codoped ZrF4-BaF2-LaF3-AlF3-NaF fiber laser operating in the 2.8 μm mid-infrared (MIR) waveband based on single-walled carbon nanotube (SWCNT) saturable absorber (SA). The SWCNTs have diameters ranging from 1.4 to 1.7 nm. modulation depth saturation intensity of SWCNT SA measured at 2850 nm are 16.5% 1.66 MW/cm2, respectively. Stable pulses with shortest pulse duration 1.46 μs maximum energy 0.43 μJ achieved launched...
Currently, the management and maintenance of space target catalogues primarily rely on multi-target survey telescope arrays. However, matching processing massive observational data poses significant challenges to traditional prediction methods. To address issues low success rates prolonged computation times in methods, this paper proposes a starting point method based multithreading technology. First, orbital elements from catalogue library are extracted for two days before after observation...
Currently, multi-target survey telescope arrays play an important role in the build-up and maintenance of space object catalog databases, collecting massive observational data without attributing information. However, matching process poses significant challenges to traditional prediction methods. To address issues low success rates prolonged computation times methods, this paper proposes a multi-threaded starting point method. First, orbital elements from Space Surveillance Tracking (SST)...
We report a tunable passively Q-switched fiber laser at the wavelengths near 3 μm, using large aspect ratio gold nanorods (LAR-GNRs) as saturable absorber (SA) for first time. The GNRs with average of up to ~20 were prepared seed-mediated growth method, which yielded strong absorption band 2.2-3 μm peak ~2600 nm, stemming from longitudinal surface plasmon resonance (SPR). corresponding nonlinear was characterized 2.87 ultrafast pulses, giving modulation depth 8.89%, saturation intensity 14.9...
In this Letter, we present the mode-locking operation of a 2.87 µm <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msup> <mml:mi mathvariant="normal">H</mml:mi> mathvariant="normal">o</mml:mi> </mml:mrow> <mml:mn>3</mml:mn> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>/</mml:mo> mathvariant="normal">P</mml:mi> mathvariant="normal">r</mml:mi> </mml:math> codoped fluoride fiber laser, helped by ultrafast nonlinear optical absorption...
We demonstrate a passively Q-switched Yb<sup>3+</sup>/Er<sup>3+</sup> co-doped fiber laser by using filmy sodium carboxymethylcellulose-based Cu<sub>1.8</sub>S nanocrystals saturable absorber.
We demonstrated a mode-locked erbium doped fiber laser (EDFL) operating at 1558 nm by exploiting ferroferric-oxide nanoparticles (FONPs) as the saturable absorber (SA) material. FONPs, with an average diameter of ~20 nm, were prepared thermal decomposition method, then mixed sodium carboxymethylcelluose to form FONP film. The SA was fabricated through sandwiched film between two connectors. By inserting FONPs into EDFL cavity pumped 980 diode, stable passive mode-locking achieved threshold...
Abstract Broadband pulsed laser generation is demonstrated by using mesoporous carbon nanospheres (MCNs) as saturable absorbers (SAs). The MCNs are prepared a “silica‐assisted” method, and then mixed with sodium carboxymethylcellulose (NaCMC) to form the film. film not only shows strong absorption from visible mid‐infrared spectral region, but also possesses nonlinear properties. As inserted into cavity, mode‐locked at 1 µm Q‐switched lasers 1.56 2 realized, respectively. In addition,...
We demonstrate an all-fiber thulium-doped femtosecond laser by using microfiber coated with gold nanorods (MF-GNRs) as a saturable absorber (SA). The MF-GNR SA exhibits broadband absorption from 1000 nm to 3000 nm. By placing the into fiber (TDFL) cavity, stable passively mode-locked central wavelength of ∼1943.5 is achieved for threshold pump power ∼870 mW. Furthermore, pulse width ∼404 fs, maximum average ∼45.5 mW, and repetition rate ∼25.66 MHz obtained 2.1 W. increased ten times reduced...
We demonstrated passively Q-switched mid-infrared (mid-IR) erbium-doped fiber lasers by using gold nanostars (GNSs) as the Q-switcher. The nonlinear optical responses of GNSs synthesized via seed-mediated method have been characterized a Z-scan technique, and modulation depth saturation intensity are measured to be 25% 15.75 kW/cm2, respectively. laser can deliver maximum average power 454 mW with corresponding pulse energy 3.6 μJ duration 536 ns at repetition rate 125 kHz under incident...
We demonstrated that gold nanowires (GNWs), as a new kind of saturable absorber (SA), could be used to construct all-fiber passively Q-switched thulium-doped fiber lasers (TDFL). The GNWs were mixed with polyvinylpyrrolidone (PVP) form the GNWs-PVP SA film. It exhibited broad absorption band covered from 300 nm 2500 nm, which was induced by surface plasmon resonance (SPR) GNWs. When film inserted into TDFL cavity pumped 1570 nm laser, stable laser at ∼1940nm obtained when threshold pump...
Optical vortex beams are of tremendous interest in diverse applications for optical tweezers, high-resolution imaging, quantum information and communications. So far, these laser sources largely rely on extra-cavity mode conversion by bulk elements (e.g. spatial light modulators, phase plates, etc.), resulting a relatively poor purity, low efficiency, non-compact structure expensive package. Vortex generated directly from cavity-mode lasers is naturally an ideal solution, but almost all them...
The real-time light curve classification of transients is helpful in searching for rare transients. We propose a new algorithm based on machine learning, namely the Temporary Convective Network and Light Gradient Boosting Machine Combined with Weight Module Algorithm (TLW). TLW can classify photometric simulation data g, r, i bands provided via PLAsTiCC, typing Tidal Disruption Event (TDE), Kilonova (KN), Type Ia supernova (SNIa), I Super-luminous (SLSN-I). When comparing results six other...