A5100762457- Advanced Measurement and Metrology Techniques
- Advanced Fiber Optic Sensors
- Pulsars and Gravitational Waves Research
- Geophysics and Sensor Technology
- Optical measurement and interference techniques
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Advanced Optical Sensing Technologies
- Seismic Waves and Analysis
- Advanced materials and composites
- Radio Astronomy Observations and Technology
- Mechanical and Optical Resonators
- Scientific Measurement and Uncertainty Evaluation
- Metal and Thin Film Mechanics
- Petroleum Processing and Analysis
- Advanced MEMS and NEMS Technologies
- Transportation and Mobility Innovations
- Advanced Frequency and Time Standards
- Cell Image Analysis Techniques
- Odor and Emission Control Technologies
- Evacuation and Crowd Dynamics
- Semiconductor Lasers and Optical Devices
Army Medical University
2024
University of Arizona
2019-2023
Tsinghua University
2010-2023
University Town of Shenzhen
2022-2023
Texas A&M University
2021-2023
Kyoto University
2023
Tsinghua–Berkeley Shenzhen Institute
2023
New York Institute of Technology
2020
Nanjing University of Posts and Telecommunications
2020
Yunnan Vocational College of Mechanical and Electrical Technology
2020
We present measurements of an optomechanical accelerometer for monitoring low-frequency noise in gravitational wave detectors, such as ground motion. Our device measures accelerations by tracking the test-mass motion a 4.7 Hz mechanical resonator using heterodyne interferometer. This is etched from monolithic fused silica, under-explored design sensors, allowing with floor competitive existing technologies but lighter and more compact form. In addition, our interferometer optical assembly...
We present the design, bench-top setup, and experimental results of a compact heterodyne interferometer that achieves picometer-level displacement sensitivities in air over frequencies above 100 mHz. The optical configuration with spatially separated beams prevents frequency polarization mixing, therefore eliminates periodic errors. is designed to maximize common-mode laser beam paths obtain high rejection environmental disturbances, such as temperature fluctuations acoustics. our...
We present a novel optomechanical inertial sensor for low frequency applications and corresponding acceleration measurements. This has resonant of 4.7Hz, mechanical quality factor 476k, test mass 2.6 gram, projected noise floor approximately 5E-11 m s-2. per root-Hz at 1Hz. Such performance, together with its small size, weight, reduced power consumption, susceptibility to environmental variables such as magnetic field or drag conditions makes it an attractive technology future geodesy...
We present a noise estimation and subtraction algorithm capable of increasing the sensitivity heterodyne laser interferometers by one order magnitude. The interferometer is specially designed for dynamic measurements test mass in application sub-Hz inertial sensing. A floor 3.31×10−11m/Hz at 100 mHz achieved after applying our to benchtop prototype that showed level 2.76×10−10m/Hz when tested vacuum levels 3×10−5 Torr. Based on previous results, we investigated techniques non-linear optical...
Displacement measuring interferometry is a crucial component in metrology applications. In this paper, we propose fiber-based two-wavelength heterodyne interferometer as compact and highly sensitive displacement sensor that can be used inertial sensing the proposed design, two individual interferometers are constructed using different wavelengths, 1064 nm 1055 nm; one of which measures target other monitors common-mode noise fiber system. A narrow-bandwidth spectral filter separates beam...
We present a compact heterodyne laser interferometer developed for high-sensitivity displacement sensing applications. This consists of customized prisms and wave plates assembled as quasi-monolithic unit to realize miniaturized system. The design adopts common-mode rejection scheme provide high ratio common environmental noise. Experimental tests in vacuum show sensitivity level 11pm/Hz at 100mHz low 0.6pm/Hz above 1pm. prototype is 20mm×20mm×10mm size weighs 4.5g, allowing subsequent...
An inertial sensor design is proposed in this paper to achieve high sensitivity and large dynamic range the subhertz-frequency regime. High acceleration obtained by combining optical cavity readout systems with monolithically fabricated mechanical resonators. A high-sensitivity heterodyne interferometer simultaneously monitors test mass an extensive for low-stiffness The bandwidth tuned feedback cooling via radiation pressure interaction using intensity-modulated laser. transfer gain of...
The LISA telescopes must exhibit an optical path length stability of $\frac{\mathrm{pm}}{\sqrt{\mathrm{Hz}}}$ in the mHz observation band to meet mission requirements. truss interferometer is a proposed method aid ground testing telescopes, as well risk-mitigation plan for flight units. This consists three Fabry-Perot cavities mounted telescope which are used monitor structural displacements. We have designed and developed fiber-based cavity injection system that integrates fiber components,...
With the emergence and popularity of electric vehicles (EVs), number EVs is increasing. However, due to insufficient limited range charging stations, energy problem has held back development EVs. Vehicle-to-Vehicle (V2V) trading seen as a potential solution problem. some problems challenges remain in current V2V scenarios. In order solve selfish behavior among vehicles, we propose an incentive Stackelberg game model facilitate We list functions buyer seller about price they set, then perform...
Precision displacement laser interferometry is crucial in various applications such as microlithography, high-performance profilometry, and gravitational wave detection. We are currently developing a fiber-based heterodyne interferometer that features compact size low noise floor. Laser beams at two different wavelengths utilized to construct fiberbased system. Narrow band spectral filters used separate the of control their optical paths. The highly common paths between interferometers...
We present a method to characterize the noise in ground-based gravitational-wave observatories such as Laser Gravitational-Wave Observatory (LIGO). This uses linear regression algorithms least absolute shrinkage and selection operator identify sources analyzes detector output vs witness sensors quantify coupling of noise. Our can be implemented with currently available resources at LIGO, which avoids extra coding or direct experimentation LIGO sites. two examples validate estimate elevated...
LISA is a space-based gravitational wave observatory aimed at detecting waves in the frequency range of 0.1 mHz to Hz. The composed three spacecraft, each separated by 2.5 million km an equilateral triangle formation, trailing Earth heliocentric orbit. One many crucial components mission telescope, bidirectional component used expand outgoing laser beam far spacecraft as well compress large incoming diameter few mm optical bench. Since telescope path long-baseline interferometer, its...
Abstract Perchloroethylene (PCE) extraction was used to reclaim elemental sulfur from flue gas biodesulfurization sludge. The sludge generated a system that concurrently treated the scrubbing solution and wastewater of citric acid production. contained approximately 40–60% sulfur; other components included dust, biomass, inorganic salts, flocculants. extracted with PCE at 80 °C, then separated by hot filtration. recovered recrystallization centrifugation. When dried particle size less than...
Multiple wavelength interferometry has long been considered an option for the measurement of large aspheric slope departures. In particular, a synthetic offers variety approaches by which phase excursions can be unwrapped. Using multiple wavelengths create collimation and magnification mismatch errors between individual that arise during beam expansion propagation. Here, we present analyze alignment calibration methods dual-wavelength interferometer significantly reduce both misalignment...
Abstract At this stage, the ecological environment has been severely destroyed in our country; situation is becoming more and serious. Under influence of complex severe mentioned above, order to effectively solve abovementioned bad development trends, country proposes sustainable strategy, it expected that through implementation previous extensive management mode will gradually be transformed into harmonious between man nature. This article mainly elaborates on view current hydrogeological...
Accelerometers are a vital component in inertial sensing and geodesy, gravitational physics, seismic noise detection, hydrology, other fields requiring precision measurements. Our group develops compact low high frequency optomechanical sensors to measure acceleration for various applications. the linear displacement of an oscillating test mass with laser interferometers that fiber-coupled or free space. The observed external is recovered from mass. 5 Hz resonator will operate as relative...
The pixel modulation transfer function response degrades the contrast of non-null interferometric surface figure measurements. We experimentally quantify this effect for spatial frequencies ranging from 0 to 363 lp/mm ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>≈</mml:mo> </mml:mrow> <mml:mn>3.33</mml:mn> </mml:math> times Nyquist limit). Our results show a low SNR frequency band that behaves like low-pass filter...
The LISA telescopes must exhibit an optical path length stability of $\frac{\mathrm{pm}}{\sqrt{\mathrm{Hz}}}$ in the mHz observation band to meet mission requirements. truss interferometer is a proposed method aid ground testing telescopes, as well risk-mitigation plan for flight units. This consists three Fabry-Perot cavities mounted telescope which are used monitor structural displacements. We have designed and developed fiber-based cavity injection system that integrates fiber components,...
Alcohol-to-jet Synthetic Paraffinic Kerosene (AtJ-SPK) has been approved as a sustainable aviation fuel (SAF), utilized by blending with conventional Jet A. In part I (Xing et al., SSRN, 2023), reduced mechanism was developed for pure AtJ-SPK combustion. However, it can not describe combustion behavior of the AtJ-SPK/Jet A blends because species in commonly used surrogate were included. Therefore, continuous work, present study aims to develop from POLIMI detailed (Ranzi Prog. Energy...