Results 81 to 90 of about 65,653 (268)

Analysis of graded-index optical fibers by the spectral parameter power series method

, 2014
Spectral parameter power series (SPPS) method is a recently introduced technique for solving linear differential equations and related spectral problems.
Kravchenko, Vladislav V., Perez, Raul Castillo, Torba, Sergii M.   +2 more
core   +1 more source

Characterization of Clinical Phenotype to Glial Fibrillary Acidic Protein Concentrations in Alexander Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To determine the concentration of glial fibrillary acidic protein (GFAP) in cerebrospinal fluid (CSF) and plasma in Alexander disease (AxD) and whether GFAP levels are predictive of disease phenotypes. Methods CSF and plasma were collected (longitudinally when available) from AxD participants and non‐AxD controls.
Amy T. Waldman, Asako Takanohashi, Joshua Y. Joung, Geraldine W. Liu, Kaley Arnold, Amy Pizzino, Walter Faig, Sarah Woidill, Sona Narula, Adeline L. Vanderver   +9 more
wiley   +1 more source

Laser-Like Performance of Side-Pumped Dye-Doped Polymer Optical Fibers

IEEE Photonics Journal, 2015
Mirrorless graded-index polymer optical fibers doped with the organic dye rhodamine 6G result in very compact broadband fiber lasers in the visible region when pumped from the side.
J. Arrue, M. A. Illarramendi, I. Ayesta, F. Jimenez, J. Zubia, A. Tagaya, Y. Koike   +6 more
doaj   +1 more source

Diffusion Spectrum Imaging Maps Early Axonal Loss and a Unique Progressive Signal in Neuronal Intranuclear Inclusion Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To delineate specific in vivo white matter pathology in neuronal intranuclear inclusion disease (NIID) using diffusion spectrum imaging (DSI) and define its clinical relevance. Methods DSI was performed on 42 NIID patients and 38 matched controls.
Kaiyan Jiang, Yixiu Pei, Xiaobao Hu, Ying Xiong, Fang Wang, Yanyan Yu, Min Zhu, Dandan Tan, Meihong Zhou, Daojun Hong, Fuqing Zhou   +10 more
wiley   +1 more source

Artificial intelligence based prediction of refractive index profile of graded refractive index optical fiber

ICT Express
This research presents a deep neural network (DNN) approach for predicting the refractive index profile in graded-index multimode fibers (GRIN MMFs).
Seung-Yeol Lee, Hyuntai Kim
doaj   +1 more source

Spatial Beam Self-Cleaning in Tapered Yb-Doped GRIN Multimode Fiber With Decelerating Nonlinearity

IEEE Photonics Journal, 2020
We experimentally demonstrate spatial beam self-cleaning in an Yb-doped graded-index multimode fiber taper, both in passive and active configurations. The input laser beam at 1064 nm was injected for propagation from the small to the large core ...
Alioune Niang, Daniele Modotto, Alessandro Tonello, Fabio Mangini, Umberto Minoni, Mario Zitelli, Marc Fabert, Mesay Addisu Jima, O. N. Egorova, Andrey E. Levchenko, Sergei L. Semjonov, Denis S. Lipatov, Sergey Babin, Vincent Couderc, Stefan Wabnitz   +14 more
doaj   +1 more source

Theory of biaxial graded-index optical fiber [PDF]

The problem of wave propagation in a biaxial graded-index fiber with circular symmetry is considered. The problem is formulated in terms of four first-order differential equations for the tangential components of the electric and magnetic fields.
Kawalko, Stephen F., Uslenghi, Piergiorgio L. E.   +1 more
core   +1 more source

Structure–Function Decoupling of the Sensorimotor and Default Mode Networks in Black Americans With MS

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano, Giacomo Boffa, Maria Petracca, Marta Ponzano, Nicole Graziano, Claire Wigley, Claire Riley, Jonathan Howard, Pietro Bontempi, Sylvia Klineova, Fred Lublin, Matilde Inglese   +11 more
wiley   +1 more source

Temporary Optical Coupler for Optical Cable Re-Routing Without Service Interruption

IEEE Photonics Journal, 2018
We design a temporary optical coupler to obtain high injection and extraction efficiencies while keeping the bending loss low with the aim of realizing optical cable re-routing without service interruption.
Takui Uematsu, Takanori Kiyokura, Hidenobu Hirota, Hiroyuki Iida, Tomohiro Kawano, Tetsuya Manabe   +5 more
doaj   +1 more source

Photon Pair Generation with Tailored Frequency Correlations in Graded-Index Multimode Optical Fibers

, 2017
We study theoretically the generation of photon pairs with controlled spectral correlations via the four-wave mixing (FWM) process in graded-index multimode optical fibers (GIMFs).
Mafi, Arash, Pourbeyram, Hamed
core   +1 more source