Results 151 to 160 of about 14,380 (286)

Ultra-high-sensitivity two-dimensional bend sensor

, 2006
A multicore fibre Fabry-Perot-based strain sensor interrogated with tandem interferometry for bend measurement is described. Curvature in two dimensions is obtained by measuring the difference in strain between three co-located low finesse Fabry-Perot ...
MacPherson, W. N.; id_orcid, Flockhart, G M H, Kirkendall, C. K., Cranch, G A, Cranch, G. A., Barton, J S, Kirkendall, C K, Barton, J. S., MacPherson, W N, Flockhart, G. M. H.   +9 more
core   +1 more source

Alteration of X‐Ray Emission Band Spectrum Under Bragg Diffraction

X-Ray Spectrometry, EarlyView.
ABSTRACT We use a Zr/Si multilayer presenting a gradient of period to probe the shape of the Si L2,3 emission band (maximum around 92 eV) in and out of Bragg conditions. The sample was prepared by magnetron sputtering and its reflectance measured in the photon energy range of interest with synchrotron radiation.
Philippe Jonnard, Jean‐Michel André, Karine Le Guen, Nawel Temmar, Anthony Boucly, Nicolas Rividi, Wanqiu Bai, Angelo Giglia, Nicola Mahne, Sheng Guo, Jingtao Zhu   +10 more
wiley   +1 more source

Crystal Structure of [Sr(SeC2H)2(NH3)2], Solved and Refined From Powder X‐Ray Diffraction Data

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
The synthesis and crystal structure of [Sr(SeC2H)2(NH3)2] are described, the first alkaline earth metal compound with the recently discovered –SeC2H anion. The title compound releases NH3 even under ambient conditions, so its crystal structure had to be determined from moderately resolved X‐ray powder diffraction data.
Lisa Körtgen, Tim Mattick, Uwe Ruschewitz   +2 more
wiley   +1 more source

VCSEL with intra-cavity circular Bragg gratings for single-mode operation

AIP Advances
In this paper, we present the design and fabrication of a single-mode Vertical-Cavity Surface-Emitting Laser (VCSEL) incorporating circular Bragg gratings (CBGs).
Shanting Hu, Xinchen Zhang, Chengyuan Lee, Bo Tian, Lei Zhu, Xiangjun Xin   +5 more
doaj   +1 more source

A Dual‐Frequency Sensitivity Model for Optical Fibre Ultrasonic Sensors in Power Transformer Partial Discharge Detection

High Voltage, EarlyView.
ABSTRACT The detection of partial discharges (PD) on the power transformer tank demands higher sensitivity in ultrasonic detection. To target the detection frequency band for sensor optimisation and enhance sensitivity, this paper presents a dual‐frequency sensitivity model for optical fibre ultrasonic sensors.
Sihan Wang, Jihang Sun, Jialin Wang, Bin Wei, Guoming Ma   +4 more
wiley   +1 more source

Bragg coaxial microwave structure in the sensor system

Физика волновых процессов и радиотехнические системы, 2014
The paper discusses the Bragg microwave structures on the coaxial cable that are based on optical technology transfer by analogy with fiber Bragg gratings.
G.A. Morozov, O.G. Morozov, A.R. Nasybullin, A.A. Sevastjanov, R.V. Farkhutdinov   +4 more
doaj  

Liquid jet capabilities for ultrafast chemistry at the SwissFEL Alvra instrument

Journal of Synchrotron Radiation, EarlyView.
The technical aspects of the Alvra endstation are outlined and its scientific capabilities are demonstrated with commissioning results obtained during the early years of SwissFEL's operation.The Alvra experimental station at the Swiss X‐ray free‐electron laser, SwissFEL, investigates ultrafast dynamics in chemical and biological systems using X‐ray ...
Claudio Cirelli, Emma Victoria Beale, Florian Dworkowski, Victoria Kabanova, Sven Augustin, Gregor Knopp, Chris Milne, Christoph Bostedt, Philip J. M. Johnson, Camila Bacellar   +9 more
wiley   +1 more source

Novel technique for measuring dispersion and detuning of a UV written silica-on-silicon waveguide

, 2010
We shall present a new method of measuring the dispersive properties of UV written waveguides in the silica-on-silicon platform used to fabricate planar Bragg gratings.
Rogers, H.L., Smith, P.G.R., Gates, J.C.
core  

The Fiery Eyes of a Maenad: Origin Determination of Faceted Garnet Eye Inlays in a Roman Bronze Bust From Southern Tyrol

Archaeometry, EarlyView.
ABSTRACT In 1837, the Tyrolean State Museum Ferdinandeum in Innsbruck, Austria, purchased a Roman bronze statue of a maenad from the 2nd century ce with red garnets as facetted eye inlays found near Brixen, Southern Tyrol. These garnets were investigated using optical microscopy, a portable hand‐held and a stationary micro‐X‐ray fluorescence device, as
H. Albert Gilg, Simon Wagner, Anton Höck, Peter Tropper   +3 more
wiley   +1 more source

Bio-Chemical Sensors Based on Excessively Tilted Fiber Grating

Photonic Sensors
Excessively tilted fiber gratings (ExTFGs) are a type of special optical fiber grating device different from traditional fiber Bragg gratings, long period fiber gratings, and tilted fiber Bragg gratings.
Fudan Chen, Hong Gu, Binbin Luo, Shenghui Shi   +3 more
doaj   +1 more source