A5100439703- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Laser-Matter Interactions and Applications
- Plasmonic and Surface Plasmon Research
- Advanced Fiber Optic Sensors
- Solid State Laser Technologies
- Mechanical and Optical Resonators
- Optical Network Technologies
- Photoacoustic and Ultrasonic Imaging
- Orbital Angular Momentum in Optics
- Photonic Crystals and Applications
- Metamaterials and Metasurfaces Applications
- Microwave Engineering and Waveguides
- Wireless Communication Networks Research
- Advanced Electrical Measurement Techniques
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Ferroelectric and Negative Capacitance Devices
- Topic Modeling
- Advanced Optical Sensing Technologies
- Advanced optical system design
- Semiconductor Lasers and Optical Devices
- Natural Language Processing Techniques
- Diamond and Carbon-based Materials Research
Tiangong University
2010-2024
Shandong Normal University
2017-2024
Hangzhou Dianzi University
2024
Institute of Optics and Electronics, Chinese Academy of Sciences
2020-2024
Chinese Academy of Sciences
2024
Imperial College London
2023
Beijing Institute of Technology
2004-2023
Shanghai Jiao Tong University
2016-2023
National Institute of Metrology
2021-2023
Peking University
2007-2022
A CMOS bandgap reference with an inaccuracy of ±0.15% (3 σ) from -40°C to 125°C is presented. In contrast prior art, it requires only a single trim achieve this level precision. detailed analysis the various error sources provided, and techniques reduce them are discussed. The prototype draws 55 μA 1.8 V supply, occupies 0.12 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> in 0.16 μm process. Experimental results two runs show that,...
To provide an analytical scheme for the dynamical behavior of nonlinear Alfvén waves in inhomogeneous plasmas, this paper investigates a generalized variable-coefficient derivative Schrödinger equation. In sense admitting Lax pair and infinitely many conservation laws, integrability equation is established under certain coefficient constraint which suggests inhomogeneities support stable solitons. The Hirota method adopted to construct one- multi-Alfvén-soliton solutions. soliton features...
A novel scheme to generate broadband high-repetition-rate optical frequency combs and low phase noise microwave signals simultaneously is proposed experimentally demonstrated. By incorporating an comb generator in optoelectronic oscillator loop, more than 200 lines are generated for a 25 GHz comb, the single-sideband as −122 dBc/Hz at 10 kHz offset signal. 20 also generated. Unlike synthesizer, of by this new independent.
Implemented optimization and full life cycle economic analysis on the inter-stage pressure ratio were rarely paid attention to in supercritical carbon dioxide multi-stage recompression. In this article, a thermodynamic model of recompression Brayton was established based gas-cooled fast reactor sensitivity performed. With aim seeking optimal for two-stage, three-stage, four-stage configuration, indicators predicted, respectively. Parameter indicated that thermodynamically optimized result...
Fano resonance theoretically is an effective approach for sensitivity enhancement in photonic sensing applications, but the reported methods suffer from complicated structure and fabrication, narrow dynamic range, etc. In this article, we propose a thermometer with sub-millikelvin resolution broad temperature measurement range implemented by simple waveguide-microring structure. An air hole introduced at center of coupling region waveguide all-pass microring resonator. The refractive index...
As a key element in wave-based analog computation, optical differentiators have been implemented to directly perform information processing, such as edge detection and pulse shaping, both spatial temporal domains. Here, we propose an spatiotemporal differentiator, which simultaneously performs first-order differentiation transmission by breaking the mirror symmetry of subwavelength bilayer metal grating. The performance plasmonic differentiator is evaluated numerically using output field...
Whispering gallery mode (WGM) photonic thermometer had achieved ultra-high sensitivity and resolution. However, while pursuing extremely high quality factor thereafter precision, power-induced self-heating within microcavity can bring a significant systematic error. We propose sensor with less than milli-kelvin effect utilizing silicon nitride (Si3N4) microring resonator loaded of 4.75 × 105. By investigating thermal broadening transmission spectra under various probing powers, effective...
Soliton microcombs generated by the third-order nonlinearity of microresonators exhibit high coherence, low noise, and stable spectra envelopes, which can be designed for many applications. However, conventional dispersion engineering based design methods require iteratively solving Maxwell's equations through time-consuming electromagnetic field simulations until a local optimum is obtained. Moreover, overall inverse from soliton microcomb to microcavity geometry has not been systematically...
Whispering gallery mode resonators (WGMRs) have proven their advantages in terms of sensitivity and precision various sensing applications. However, when high is pursued, the WGMR demands a high-quality factor usually at cost its free spectral range (FSR) corresponding measurement range. In this article, we propose high-resolution wide-range temperature sensor based on chip-scale WGMRs, which utilizes Si 3 N 4 ring resonator as element MgF 2 -based microcomb broadband frequency reference. By...
Aiming to overcome the low converging rate and susceptibility environment in focusing coherent light through turbid medium, four-element division algorithm (FEDA) optimization is proposed. Full levels of comparisons with currently employed element-based algorithms, stepwise sequential (SSA), continuous (CSA) show that FEDA only takes one third measurement time find optimized solution, which means promising practical applications, such as for deep tissue imaging.
Crystalline micro-resonators are attractive for a wide range of applications due to their extremely high quality (Q) factor. In this paper, we develop semi-automatic method fabricating ultra-high Q-factor MgF2 crystalline micro-resonators. By utilizing force feedback sensor and corresponding control, made precision grind-and-polishing machine, successfully fabricated trapezoid resonators with diameter 9.5 mm root mean square surface roughness 0.26 nm. The maximum difference peaks valleys is...
Organoids, the 3D culture systems derived from stem cells, are promising models for human organs. However, organoid study requires large-volume imaging with single cell resolution, which is beyond spatial bandwidth limit of conventional optical microscopy. Herein, we propose a lensless holographic microscope empowered time and memory-saving algorithm. It solves trade-off between field view, processing speed, provides practical tool organoids. We first build compact microscopy system using...
High-quality all-carbon nanostructure graphdiyne (GDY) saturable absorber was successfully fabricated and absorption properties in the 2 μm region were characterized using a commercial mode-locked laser as pulsed source. The GDY first used an optical switcher passively Q-switched Ho laser. Under absorbed pump power of 2.4 W, maximum average output shortest pulse width 443 mW 1.38 µs, at repetition rate 29.72 kHz. results suggest that nanomaterial is promising candidate modulator for...
Abstract Dispersion and electrical properties of fluorinated carbon black‐filled poly(vinylidene fluoride) (PVDF) composites were studied as a function the fluorine content. It was found that with increasing content particles tend to stick together form large aggregates. The percolation concentration increases high concentration, whereas process becomes gradual. temperature dependence resistivity measurements show PVDF exhibit PTC intensity low NTC effect. These phenomena discussed in terms...
Gold nanobipyramids (Au-NBPs) were successfully fabricated using the seed-mediated growth method. The saturable absorption performance of Au-NBPs at a 2-μm band wavelength was characterized. Using excellent-quality, mature Ho:YLF crystals, doubly Q-switched (DQS) laser joining an acousto-optic modulator (AOM) with Au-NBP absorber (SA) achieved. When modulation rate AOM 1 kHz, shortest pulse width (54 ns) attained, corresponding to highest peak power (3.87 kW). This compared singly SA,...
Photonic-based thermometers have been attracting intense research interest as a potential alternative to traditional electrical due their physical and chemical stability immunity electromagnetic interference. However, the high requirements for of laser source, existing studies on resolution are only theoretical predictions do not include real-measured results. In this paper, we report fabrication characterization an on-chip silicon whispering-gallery-mode (WGM) ring resonator thermometer....
An algorithm based on sequential convex programming and artificial neural networks is proposed to solve the multi-stage trajectory planning problem of dual-pulse missiles considering range safety. Besides nonlinear dynamics constraints, missile introduces many discrete optimization variables (such as ignition time second-stage thrust), needs consider throwing engine off a safe location ensure safety, which makes for more difficult solve. In this study, whole first divided into four stages...
A simple stable single-longitudinal-mode (SLM) single- and dual-wavelength erbium-doped fiber ring laser using an arrayed waveguide grating as the wavelength filter is proposed demonstrated. SLM operation guaranteed by a saturable-absorber-based auto-tracking filter. 40/60 optical coupler used to form two imbalanced loss cavities in initially, can be changed properly modifying variable attenuator. The side mode suppression ratios of outputs are higher than 60 dB. Through switching switches,...