Results 31 to 40 of about 178,205 (281)

Distributed acoustic sensing with Michelson interferometer demodulation

Photonic Sensors, 2016
The distributed acoustic sensing (DAS) has been extensively studied and widely used. A distributed acoustic sensing system based on the unbalanced Michelson interferometer with phase generated carrier (PGC) demodulation was designed and tested.
Xiaohui Liu, Chen Wang, Ying Shang, Chang Wang, Wenan Zhao, Gangding Peng, Hongzhong Wang   +6 more
doaj   +1 more source

Analysis of Dielectric Waveguide Grating and Fabry–Perot Modes in Elastic Grating in Optical Detection of Ultrasound

Sensors, 2021
In our previous work, we have demonstrated that dielectric elastic grating can support Fabry–Perot modes and provide embedded optical interferometry to measure ultrasonic pressure.
Suejit Pechprasarn, Chayanisa Sukkasem, Phitsini Suvarnaphaet   +2 more
doaj   +1 more source

Fundamental study for measuring microflow with Michelson interferometer enhanced by external random signal

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2014
We propose a measuring technique for microflow based on the stochastic resonance phenomenon. The minute changed signal from the microflow hidden within the threshold of multi-threshold imaging sensors, such as CCDs, can be reconstructed using an external
Masaki MICHIHATA, Phong TRAN DANG, Terutake HAYASHI, Yasuhiro TAKAYA   +3 more
doaj   +1 more source

Non-destructive Fiber-optic Sensor System for the Measurement of Speed in Road Traffic

Advances in Electrical and Electronic Engineering, 2016
Fiber-optic sensors offer an attractive option to existing sensors for the measurement of the vehicle speed in road traffic. This article describes the measuring scheme of two interferometric sensor units including input-output components for the ...
Jan Nedoma, Marcel Fajkus, Lukas Bednarek, Vladimir Vasinek   +3 more
doaj   +1 more source

Feasibility Study of a Piezo Actuator as a Potential Standard in Calibration for Roundness Instruments

Sensors, 2022
The paper presents experimental data that show the possible application of a piezo actuator in the role of calibration standard that can serve as an alternative route to currently available methods like gauge blocks or flick standards.
Anna Trych-Wildner, Krzysztof Wildner, Piotr Sosinowski   +2 more
doaj   +1 more source

Quantum noise in gravitational-wave interferometers: Overview and recent developments [PDF]

, 2003
We present an overview of quantum noise in gravitational wave interferometers. Gravitational wave detectors are extensively modified variants of a Michelson interferometer and the quantum noise couplings are strongly influenced by the interferometer ...
Corbitt, Thomas, Mavalvala, Nergis
core   +4 more sources

Harmonically-related diffraction gratings-based interferometer for quadrature phase measurements [PDF]

, 2006
We demonstrate the use of shallow diffraction gratings for quadrature phase interferometry. A single shallow diffraction grating-based Michelson interferometer yields only trivial (0° or 180°) phase shift between different output ports.
Cui, Xiquan, Heng, Xin, Wu, Jigang, Yang, Changhuei, Yaqoob, Zahid   +4 more
core   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Feedback-assisted quantum nondemolition measurement in an atom-light-correlated interferometer

New Journal of Physics
Quantum nondemolition (QND) measurement plays an essential role in quantum optics and quantum information. Here, a feedback-assisted atom-light-correlated interferometer (FALCI) is proposed and applied to the QND measurement of photon number, in which ...
Gao-Feng Jiao
doaj   +1 more source

Tunable optical cavities for wavelength Indications in Gas Laser [PDF]

Kirkuk Journal of Science, 2016
Explain an all-optical tunable detention in gas laser based on wavelength conversion wavelength reconversion. The use of stable, calibrated optical reference cavities to equipping interferometer users with more exactly.
Suran D. Yaseen
doaj   +1 more source