Results 71 to 80 of about 131,065 (169)

Two-dimensional ultrasound receive array using an angle-tuned Fabry-Perot polymer film sensor for transducer field characterization and transmission ultrasound imaging [PDF]

, 2005
A 2-D optical ultrasound receive array has been investigated. The transduction mechanism is based upon the detection of acoustically induced changes in the optical thickness of a thin polymer film acting as a Fabry-Perot sensing interferometer (FPI).
Beard, P.C.
core  

Development and Optimization of a Differential Signal-Based Fabry-Perot Interferometer for Nanopositioning

Tehnički Glasnik
In this study, we present the optimization of a Fabry-Perot interferometer with a differential signal utilized as the laser encoder to meet the stringent demands of nanopositioning.
Syuan-Cheng Chang, Chung-Ping Chang, Yung-Cheng Wang   +2 more
doaj   +1 more source

Equatorial F‐Region Responses to the Main Phase of the 10 May 2024 Geomagnetic Storm Over the South American Sector: Observations and Model Simulations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study examines the equatorial ionospheric response over the South American sector during the onset of the extreme 2024 Mother's Day geomagnetic storm, which began at ∼17 UT on 10 May and reached the G5 level. Pronounced disturbances in ionospheric electrodynamics were observed under both daytime and nighttime conditions. Variations in the
A. M. Santos, J. R. Souza, I. S. Batista, M. Bravo, C. G. M. Brum, J. H. A. Sobral, S. S. Chen, R. Sá, L. C. A. Resende, J. Moro, P. R. Jauer, L. da Silva, D. Medeiros, P. A. B. Nogueira, E. A. Kherani, V. F. Andrioli, M. A. Abdu, G. S. Adeniran, R. de Jesus, A. A. Pimenta, G. Yang, F. A. de Souza   +21 more
wiley   +1 more source

First tristatic studies of meso-scale ion-neutral dynamics and energetics in the high-latitude upper atmosphere using collocated fpis and EISCAT radar [PDF]

, 2004
A unique experiment was undertaken during the nights of 27 and 28 February 2003. Tristatic Fabry-Perot Interferometer (FPI) measurements of the upper thermosphere were co-located with tristatic EISCAT radar measurements of the ionosphere.
Aylward, A. D., McWhirter, I., Kosch, M.J., Ford, E.A.K., Aruliah, A.L., Ford, E. A. K., Griffin, E.M., Aruliah, A. L., Howells, V.S.C., Aylward, A.D., Charalambous, A., Howells, V. S. C., Kosch, M. J., Davis, C.J., Griffin, E. M., Davis, C. J.   +15 more
core  

Rouard's method as a modelling tool for the sensing characteristics of complex fibre Fabry-Perot interferometers formed between chirped fibre Bragg gratings [PDF]

, 2005
Phase and spectral response characteristics of fibre Fabry-Perot interferometers (FFPI), formed between linearly chirped fibre Bragg gratings (FBG), were theoretically modelled using Rouard's method.
Ralph P. Tatam, Tatam, Ralph P., Chehura, Edmon, James, Stephen W., Stephen W. James, Edmon Chehura   +5 more
core   +1 more source

Fiber-Optic Extrinsic Fabry-Perot Interferometer Inspired Microwave Device: A Novel Ultra-Sensitive Sensing Platform

, 2022
Inspired by the Fiber-Optic Extrinsic Fabry-Perot Interferometer, We Report a Novel and Universal Ultra-Sensitive Microwave Fabry-Perot Sensing Platform based on an Open-Ended Hollow Coaxial Cable Resonator (OE-HCCR) for Sub-Nanometer Displacement ...
Zhu, Chen, Huang, Jie
core   +1 more source

One-shot x-ray detection based on the instantaneous change in the refractive index of GaAs

AIP Advances, 2020
An interferometric semiconductor x-ray detection system is proposed in this paper. The system is based on the RadOptic effect, and it utilizes Fabry–Perot interferometry to measure radiation-induced changes in the optical refractive index of a ...
Guilong Gao, Kai He, Tao Yi, Meng Lv, Yun Yuan, Xin Yan, Fei Yin, Shaohui Li, Ronghao Hu, Tao Wang, Jinshou Tian   +10 more
doaj   +1 more source

High-temperature fiber-optic Fabry-Perot interferometric sensors [PDF]

, 2015
A photonic crystal fiber (PCF) based high-temperature fiber-optic sensor is proposed and experimentally demonstrated. The sensor head is a Fabry-Perot cavity manufactured with a short section of endless single-mode photonic crystal fiber (ESM PCF).
Jiang Y, Ding WH, Gao R, Liu YW(刘曰武), Gao, R (reprint author), Beijing Inst Technol, Sch Optoelect, Beijing 100081, Peoples R China., Yuewu Liu, Ran Gao, Yi Jiang, Wenhui Ding   +8 more
core   +1 more source

O PERFIL DE TEMPERATURA NA REGIÃO DA MESOPAUSA EM SÃO JOSÉ DOS CAMPOS (23° S, 46° O) OBTIDO COM RADAR DE LASER

Brazilian Journal of Geophysics, 1997
Este artigo trata da obtenção do perfil de temperatura atmosférica entre 80 e 100 km de altura, região da mesopausa. Ele é baseado no desenvolvimento e aprimoramento de uma técnica experimental simples que permite determinar a temperatura da ...
M. P. P. M. Jorge, B. R. Clemesha, P. P. Batista, D. M. Simonich   +3 more
doaj   +1 more source

Axially symmetrical Fabry-Perot oscillator with multiple devices inserted in dielectric substrate [PDF]

, 1997
We investigate an axially symmetrical Fabry-Perot oscillator with active devices inserted in a dielectric substrate for power combining of many more devices in the microwave and millimeter wave frequency range.
Sanagi, Minoru, S. Nogi, Nogi, Shigeji, M. Sanagi, Itoga, Toshihide, T. Itoga   +5 more
core   +1 more source