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Measurement of mass diffusion coefficients of O_2 in aviation fuel through digital holographic interferometry

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Chinese Journal of Aeronautics 2019年第5期32卷 1184-1189页

作者： Chaoyue LI Weihua LIU Xiaotian PENG Lei SHAO Shiyu FENG Key Laboratory of Aircraft Environment Control and Life Support of Ministry of Industry and Information Technology College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics

The experimental apparatus to measure the mass diffusion coefficients of O2 in aviation fuel was constructed based on the digital holographic interferometry method. The theory of mass diffusion coefficient and interference image processing were introduced in detail. The accuracy of the experiment was verified by measuring the mass diffusion coefficient of 0.33 mol/L KCl in aqueous solution at 298.15 K. The mass diffusion coefficients of O_2 in RP3 and RP5 aviation fuels were measured at temperature from 278.15 K to 333.15 K, and the Arrhenius equation was employed to fit the experimental data. In terms of the Stokes-Einstein equation, the viscosities of these two aviation fuels were tested to estimate the correlation among mass diffusion coefficient, viscosity and temperature. A uniform polynomial calculation correlation was proposed to predict the mass diffusion coefficients of O_2 in both RP3 and RP5 aviation fuels, and its accuracy is considerably higher than that of the Stokes-Einstein equation.

关键词： Aviation fuel Diffusion coefficients Digital holographic interferometry Oxygen Viscosity

Transport model analysis of the pion interferometry in Au+Au collisions at Ebeam=1.23 GeV/nucleon

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Science China(Physics,Mechanics & Astronomy) 2023年第2期66卷 51-58页

作者： Pengcheng Li Yongjia Wang Qingfeng Li Hongfei Zhang School of Science Huzhou UniversityHuzhou 313000China School of Nuclear Scienceand Technology Lanzhou UniversityLanzhou730oooChina Institut für Theoretische Physik Goethe Universitat FrankfurtFrankfurt am Main 60438Germany Institute of Modern Physics Chinese Academyof SciencesLanzhou730000China School of Physics Xi'an JiaotongUniversityXi'an710049China

Within the framework of the Ultra-relativistic Quantum Molecular Dynamics model,the effects of resonance decay widths,inmedium nucleon-nucleon(in)elastic cross sections,and potentials on the pion Hanbury-Brown-Twiss(HBT)intensity interferometry in central Au+Au collisions at Ebeam=1.23 GeV/nucleon are *** results show that the pion emission source is visibly influenced by theΔparticles with small invariant masses,i.e.,with long resonance ***,the pion HBT radii are found to be insensitive to the nucleon-nucleon(in)elastic cross sections,while the measured rapidity distributions of the charged pions are sensitive to the nucleon-nucleon(in)elastic cross sections and can be much better reproduced by considering a reduction factor on the nucleon-nucleon inelastic cross *** observed charge-sign difference of the source radii,especially in outward and sideward directions,can be qualitatively explained by simulations with the potential contributions,especially including the Coulomb potential of *** present work demonstrates that the potential updates play important roles in describing the measured HBT radii and duration-time-related radii ratios when understanding the dynamics in relativistic heavy-ion collisions at~GeV beam energies.

关键词： interferometry beam relativistic

Achieving 1.2 fm/Hz^(1/2)Displacement Sensitivity with Laser interferometry in Two-Dimensional Nanomechanical Resonators:Pathways towards Quantum-Noise-Limited Measurement at Room Temperature

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Chinese Physics Letters 2023年第3期40卷 74-81页

作者： Jiankai Zhu Luming Wang Jiaqi Wu Yachun Liang Fei Xiao Bo Xu Zejuan Zhang Xiulian Fan Yu Zhou Juan Xia Zenghui Wang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China School of Physics and Electronics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China

Laser interferometry is an important technique for ultrasensitive detection of motion and *** push the limit of laser interferometry through noise optimization and device *** contribution of noises other than shot noise is reduced from 92.6%to 62.4%,demonstrating the possibility towards shotnoise-limited *** noise thermometry,we quantify the laser heating effect and determine the range of laser power values for room-temperature *** detailed analysis and optimization of signal transduction,we achieve 1.2 fm/Hz^(1/2)displacement measurement sensitivity at room temperature in twodimensional(2D)Ca Nb_(2)O_(6)nanomechanical resonators,the best value reported to date among all resonators based on 2D *** work demonstrates a possible pathway towards quantum-noise-limited measurement at room temperature.

关键词： noise interferometry optimization

All-optical attosecond time domain interferometry

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National Science Review 2021年第10期8卷 15-22页

作者： Zhen Yang Wei Cao Yunlong Mo Huiyao Xu Kang Mi Pengfei Lan Qingbin Zhang Peixiang Lu Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan Institute of Technology CAS Center for Excellence in Ultra-intense Laser Science

interferometry, a key technique in modern precision measurements, has been used for length measurement in engineering metrology and astronomy. An analogous time-domain interferometric technique would represent a significant complement to spatial domain applications and require the manipulation of interference on extreme time and energy scales. Here, we report an all-optical interferometer using laser-driven high order harmonics as attosecond temporal slits. By controlling the phase of the temporal slits with an external field, a time domain interferometer that preserves both attosecond temporal resolution and hundreds of me V energy resolution is implemented. We apply this exceptional temporal resolution to reconstruct the waveform of an arbitrarily polarized optical pulse, and utilize the provided energy resolution to interrogate the abnormal character of the transition dipole near the Cooper minimum in argon. This novel attosecond interferometry paves the way for high precision measurements in the time-energy domain using all-optical approaches.

关键词： interferometry attosecond all-optical precision measurement

Homomorphic partial differential equation filtering method for electronic speckle pattern interferometry fringes based on fringe density

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Chinese Optics Letters 2009年第3期7卷 210-213页

作者：张芳刘文耀夏琳王晋疆朱越 College of Precise Instrument and Optical Electronic Engineering Tianjin University Key Laboratory of Opto-Electronics Information Technical Science Ministry of Education

Noise reduction is one of the most exciting problems in electronic speckle pattern interferometry. We present a homomorphic partial differential equation filtering method for interferometry fringe patterns. The diffusion speed of the equation is determined based on the fringe density. We test the new method on the computer-simulated fringe pattern and experimentally obtain the fringe pattern, and evaluate its filtering performance. The qualitative and quantitative analysis shows that this technique can filter off the additive and multiplicative noise of the fringe patterns effectively, and avoid blurring high-density fringe. It is more capable of improving the quality of fringe patterns than the classical filtering methods.

关键词： Computational fluid dynamics Image quality Interferometers interferometry Moire fringes Partial differential equations Speckle

Variational denoising method for electronic speckle pattern interferometry

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Chinese Optics Letters 2008年第1期6卷 38-40页

作者：张芳刘文耀唐晨王晋疆任丽 College of Precise Instrument and Optical Electronic Engineering Tianjin University Department of Applied Physics Tianjin University

Traditional speckle fringe patterns by electronic speckle pattern interferometry （ESPI） are inherently noisy and of limited visibility, so denoising is the key problem in ESPI. We present the variational denoising method for ESPI. This method transforms the image denosing to minimizing an appropriate penalized energy function and solving a partial differential equation. We test the proposed method on computer- simulated and experimental speckle correlation fringes, respectively. The results show that this technique is capable of significantly improving the quality of fringe patterns. It works well as a pre-processing for the fringe patterns by ESPI.

关键词： Computer simulation interferometry Partial differential equations Speckle

A novel method to obtain electronic speckle pattern interferometry fringe patterns with high contrast

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Chinese Optics Letters 2009年第9期7卷 788-790页

作者：李孟委唐晨王高任宏伟唐科叶天宇 Key Laboratory of Instrumentation Science & Dynamic Measurement Ministry of EducationNorth University of China Department of Applied Physics Tianjin University

Traditional speckle fringe patterns of electronic speckle pattern interferometry （ESPI） are obtained by adding, subtracting, or multiplying the speckle patterns recorded before and after the deformation. However, these speckle fringe patterns are of limited visibility, especially for addition and multiplication fringe patterns. We propose a novel method to obtain speckle fringe patterns of ESPI from undeformed and deformed speckle patterns. The fringe pattern generated by our method is of high contrast and has better quality than subtraction fringe. The new method is simple and does not require more computational effort. The proposed method is tested on the experimentally obtained undeformed and deformed speckle patterns. The experimental results illustrate the performance of this approach.

关键词： Interferometers interferometry

Measurement of the Optical Coherence of a Femtosecond Pulsed Laser by Shearing interferometry with a Double-Frequency Grating

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Chinese Physics Letters 1998年第1期15卷 32-34页

作者： MING Hai QIAN Jiang-yuan XIE Jian-ping A.B.Fedotov X.Xiao M.M.T.Loy Department of Physics University of Science and Technology of ChinaHefei 230026 Department of Physics Hong Kong University of Science&TechnologyClear Water BayKowloonHong KongChina

Shearing interferometry of an ion-etched holographic double-frequency grating is used to measure the optical coherence of femtosecond pulsed *** experimental results show that the optical coherence of the femtosecond light beam is not only related to the spectral width and size of the light source but is also related to the pulse duration and mode-locked laser *** results of theoretical analysis and numerical calculation are also *** of this research is also discussed.

关键词： Femto holographic interferometry

Ultrastable embedded surface plasmon confocal interferometry

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Light(Science & Applications) 2014年第1期3卷 155-160页

作者： Suejit Pechprasarn Bei Zhang Darren Albutt Jing Zhang Michael Somekh Institute of Biophysics Imaging and Optical Science(IBIOS) Life Sciences Building University of NottinghamNottingham NG72RDUK Department of Electronic and Information Engineering Hong Kong Polytechnic UniversityKowloonHong KongChina

As disease diagnosis becomes more sophisticated,there is a requirement to measure small numbers of molecules attached to,for instance,an *** requires a sensor capable not only of high sensitivity but also the ability to make measurements over a highly localized *** previous publications,we have shown how a modified confocal microscope allows one to make localized surface plasmon(SP)measurements on a scale far smaller than the surface plasmon propagation *** present implementation presents a new ultrastable interferometer system,which greatly improves the noise ***,we have used the central part of the back focal plane to form a reference beam with the reradiated surface *** the current system,we block the central part and use the spatial light modulator to deflect s-polarized light into the pinhole to form an interference signal with the surface plasmons,thus creating an ultrastable interferometer formed with two beams incident at very similar *** demonstrate the superior noise performance of the system in hostile environments and examine further adaptations of the system to further enhance noise performance.

关键词： biosensor common path confocal microscopy interferometry surface plasmon