Results 61 to 70 of about 9,072 (243)
FIBER OPTIC MEASUREMENT SYSTEM FOR DETERMINATION OF EXTENDED OBJECT POSITION AND BENDS IN 3D SPACE [PDF]
Научно-технический вестник информационных технологий, механики и оптики, 2020 Subject of Research. Fiber optic measurement systems are widely used in various industries. Most of these systems are fiber optic devices for detecting physical quantities.
Daria A. Egorova +3 more
doaj +1 more source
Advanced Materials, EarlyView.Mixed‐cation lead mixed‐halide perovskites suffer from structural instabilities linked to nanoscale heterogeneity. To probe this non‐destructively, a low‐dose, concurrent 4D‐STEM and EDX methodology has been developed. Examining a (FA0.83Cs0.17)Pb(I0.8Br0.2)3 film revealed a complex mosaic of coexisting crystal structures. Crucially, local deficiencies
Jinseok Ryu +6 more
wiley +1 more source
Bragg grating based integrated photonic Hilbert transformers [PDF]
, 2013 Planar Bragg grating based photonic Hilbert transformers are experimentally demonstrated in this work. Planar Bragg gratings are utilized to implement a general Hilbert transform, a fractional order Hilbert transform and terahertz bandwidth Hilbert ...
Smith, P.G.R. +7 more
core +1 more source
Nanosecond switching of fiber Bragg gratings
Optics Express, 2007 A FBG was written in a two-hole fiber with internal alloy electrodes. Nanosecond high current pulses cause metal expansion, increase birefringence and tune the gratings with a response time of 29 ns. This short length, low loss, all-spliced high-speed wavelength switching devices described here has potential use in Q-switching fiber laser.
Zhangwei, Yu +4 more
openaire +2 more sources
Liquid Metal‐Based Stretchable Strain Sensor for Fruit Growth Monitoring
Advanced Materials Technologies, EarlyView.Schematic overview of the fruit growth sensor development workflow, including sensor fabrication by injection molding, electromechanical and environmental characterization, mechanical stability testing, electronic readout integration, and outdoor field validation for monitoring of fruit growth under practical orchard conditions.
Asad Ullah +7 more
wiley +1 more source
Photothermal effects in fiber Bragg gratings
Applied Optics, 2006 Writing a fiber Bragg grating in optical fiber generates an intrinsic broadband absorption term that can result in photothermal heating during subsequent use with fiber core guided light. This, in turn, can cause a significant shift of a grating resonance via the thermo-optic coefficient, even at low in-fiber light powers.
Littler, I, Grujic, T, Eggleton, B
openaire +3 more sources
A Magnetostrictive Composite-Fiber Bragg Grating Sensor [PDF]
Sensors, 2010 This paper presents a light and compact optical fiber Bragg Grating sensor for DC and AC magnetic field measurements. The fiber is coated by a thick layer of a magnetostrictive composite consisting of particles of Terfenol-D dispersed in a polymeric matrix.
Quintero, Sully M. M. +4 more
openaire +3 more sources
Single‐Layer Cholesteric Liquid Crystal Polymer Films With Visible Broadband Reflection
Advanced Optical Materials, EarlyView.A single‐layer spin‐coated cholesteric liquid crystal polymer film exhibiting broadband reflection across the visible spectrum is demonstrated. By controlling photopolymerization‐induced pitch‐gradient formation, the film achieves low‐scattering broadband reflection, circular polarization selectivity, and compatibility with photolithographic patterning
Po‐Chun Shih +5 more
wiley +1 more source
IEEE Photonics Journal, 2014 The acousto-optic modulation of fiber Bragg gratings in a four-hole suspended core fiber is experimentally demonstrated. Strong modulations with a reflectivity amplitude decrease by up to 67% and a 57% bandwidth increase in the Bragg resonance are ...
Ricardo E. Silva +5 more
doaj +1 more source
From Rigid to Soft Robotic Approaches for Neuroendoscopy
Advanced Robotics Research, EarlyView.Robotic assistance has had minimal impact on deep intraventricular surgeries, where small‐scale, precision, and reduced invasiveness can contribute to improved patient outcomes. Emerging technologies in rigid, soft, and hybrid robotics are reviewed to identify the most promising mechanisms for deep brain navigation in addition to an attempt to identify
Kieran Gilday +3 more
wiley +1 more source