Results 21 to 30 of about 2,801,699 (134)

Cure monitoring of a UV cured epoxy resin using a long period grating Mach- Zehnder interferometer [PDF]

open access: yes, 2007
A cascaded long period grating Mach-Zehnder interferometer is used to monitor the change in refractive index of a UV cured epoxy resin over a cure cycle.
Richard P. Murphy   +7 more
core   +1 more source

High‐Speed Integrated Graphene‐Silicon Slot‐Waveguide Electro‐Absorption Modulator at 2 and 1.5 µm Wavebands

open access: yesLaser &Photonics Reviews, EarlyView.
A high‐speed, efficient, robust, and compact 2‐μm$\mathrm{\mu}\mathrm{m}$ waveband E/O absorption modulator based on a graphene‐silicon slot waveguide is demonstrated. This work represents a significant advancement towards the realization of high‐speed integrated E/O modulators for optical communication systems operating at the 2‐μm$\mathrm{\mu}\mathrm{
Chao Luan   +3 more
wiley   +1 more source

Interferometric Measurement of Density in Nonstationary Shock Wave Reflection Flow and Comparison with CFD

open access: yes, 2005
We present density measurements from the application of interferometry and Fourier transform fringe analysis to the problem of nonstationary shock wave reflection over a semicircular cylinder and compare our experimental measurements to theoretical ...
姜宗林   +6 more
core   +2 more sources

Accounting for convective effects in zero-Mach-number thermoacoustic models [PDF]

open access: yes, 2014
This paper presents a methodology to account for some mean-flow effects on thermo-acoustic instabilities when using the zero-Mach-number assumption. It is shown that when a computational domain is represented under the M=0 assumption, a nonzero-Mach ...
Nicoud, F.   +5 more
core   +1 more source

Simultaneous ToF/FMCW LiDAR Using a Dual‐Mode Light Source in a Single Architecture

open access: yesLaser &Photonics Reviews, EarlyView.
A simultaneous ToF/FMCW LiDAR architecture is demonstrated using a dual‐mode light source that alternately generates optical pulses and frequency‐chirped light within a single acquisition. By combining time‐domain ToF and coherent FMCW ranging, the system achieves high‐resolution ranging and velocity sensing while extending the measurable range beyond ...
Gyeongmin Kweon   +5 more
wiley   +1 more source

Bifurcating Mach Shock Reflections with Application to Detonation Structure [PDF]

open access: yes, 2011
Numerical simulations of Mach shock reflections have shown that the Mach stem can bifurcate as a result of the slip line jetting forward. Numerical simulations were conducted in this study which determined that these bifurcations occur when the Mach ...
Mach, Philip
core   +1 more source

Metasurface‐Enabled Single‐Shot Intensity‐and‐Phase‐Interrogation Surface‐Plasmon‐Resonance Microscopy

open access: yesLaser &Photonics Reviews, EarlyView.
A metasurface‐enabled full‐Stokes polarimeter is integrated with phase‐interrogated surface plasmon resonance microscopy to enable single‐shot recovery of intensity and differential phase. The non‐interferometric platform supports quantitative refractive‐index and thickness mapping, wavelength‐resolved sensing, and dynamic multi‐channel monitoring ...
Houxin Fan   +5 more
wiley   +1 more source

Advancements and future prospects in the fundamental theories of rock blasting research Ⅲ—Interaction mechanism between blast waves and cracks

open access: yes工程科学学报
The “three relationships (the relationship between rock failure characteristics and blast loading, the superposition effect between blast waves and explosion gas, and the interaction between blast waves and cracks)” are important contents of the rock ...
Peng XU   +4 more
doaj   +1 more source

A Scalable Platform for Massively Parallel Superconducting Single‐Photon Detection

open access: yesLaser &Photonics Reviews, EarlyView.
One hundred independent superconducting nanowire detectors, each with efficiency up to 80.1–98.3%, are integrated into a single compact system operating below 2.1 K. This parallel architecture supports fully connected multi‐user quantum entanglement distribution, while its scalability opens new avenues in optical quantum computing, QKD networks ...
You Xiao   +14 more
wiley   +1 more source

On the investigation of shock wave/boundary layer interaction with a high-order scheme based on lattice Boltzmann flux solver

open access: yesAdvances in Aerodynamics
Shock wave/boundary layer interaction (SWBLI) continues to pose a significant challenge in the field of aerospace engineering. This paper aims to address this issue by proposing a novel approach for predicting aerodynamic coefficients and heat transfer ...
Jian Qin, Haichuan Yu, Jie Wu
doaj   +1 more source

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