Results 31 to 40 of about 4,434,198 (281)

Accelerated nonlinear interactions in graded-index multimode fibers [PDF]

open access: yesNature Communications, 2019
AbstractMultimode optical fibers have recently reemerged as a viable platform for addressing a number of long-standing issues associated with information bandwidth requirements and power-handling capabilities. As shown in recent studies, the complex nature of such heavily multimoded systems can be effectively exploited to observe altogether novel ...
M. A. Eftekhar   +8 more
openaire   +3 more sources

Design guidelines for collimating or focusing graded-index fiber tips [PDF]

open access: yes, 2021
Graded-index optical fiber probes suitable for focusing or collimating the output of an optical fiber at a wavelength of 1.3 µm have become an enabling technology in optical coherence tomography imaging applications for in vivo bioimaging.
Phillips, N.   +2 more
core   +1 more source

Spatial Frequency Multiplexing of Fiber-Optic Interferometric Refractive Index Sensors Based on Graded-Index Multimode Fibers

open access: yesSensors, 2012
Fiber-optic interferometric sensors based on graded-index multimode fibers have very high refractive-index sensitivity, as we previously demonstrated. In this paper, spatial-frequency multiplexing of this type of fiber-optic refractive index sensors is ...
Hui-Juan Wu   +5 more
doaj   +1 more source

Photonic crystal fiber half-taper probe based refractometer [PDF]

open access: yes, 2014
A compact singlemode - photonic crystal fiber - singlemode fiber tip (SPST) refractive index sensor is demonstrated in this paper. A CO2 laser cleaving technique is utilised to provide a clean-cut fiber tip which is then coated by a layer of gold to ...
Bo, Lin   +8 more
core   +1 more source

Modeling of High-Power Graded-Index Fiber Amplifiers

open access: yesPhotonics
Graded-index fibers have been used in recent years to make high-power fiber lasers and amplifiers. Such fibers exhibit self-imaging, a phenomenon in which any optical beam periodically reproduces its original shape in undoped fibers (no gain).
Anuj P. Lara   +2 more
doaj   +1 more source

Enhanced flexural performances of cementitious composite beams with continuously graded steel fiber distribution

open access: yesMaterials & Design, 2023
This paper focuses on improving the flexural behavior of steel fiber-reinforced beams with continuously graded structure. Successive vibrating after casting is assumed to be a feasible way to produce graded fiber-reinforced beams (GFRBs), resulting in ...
Le Li   +7 more
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider   +15 more
wiley   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Light coupling by a vortex lens into graded index fiber

open access: yes, 2001
This paper reports a novel launch scheme for coupling light into the skew rays of a graded index fiber. This is accomplished by utilizing a diffractive optical element in conjunction with a single mode fiber to mode match a graded index fiber.
Koehler, Charles   +2 more
core   +2 more sources

Optical Fiber Cladding SPR Sensor Based on Core-Shift Welding Technology

open access: yesSensors, 2019
The typical structure of an optical fiber surface plasmon resonance (SPR) sensor, which has been widely investigated, is to produce the SPR phenomenon by the transmission of light in a fiber core.
Yong Wei   +7 more
doaj   +1 more source

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