Implantable graded‐index fibers for neural‐dynamics‐resolving brain imaging in awake mice on an air‐lifted platform
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Biophotonics"
DOI: 10.1002/jbio.202200025
Abstract: We demonstrate a versatile framework for cellular brain imaging in awake mice based on suitably tailored segments of graded‐index (GRIN) fiber. Closed‐form solutions to ray‐path equations for graded‐index waveguides are shown to offer important insights… read more here.
Keywords: graded index; brain; fiber; brain imaging ... See more keywords
Optimization of anti-reflective coatings using a graded index based on silicon oxynitride
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Computational Electronics"
DOI: 10.1007/s10825-019-01334-2
Abstract: The present work deals with a comparative study of three anti-reflective coatings (ARCs) based on oxynitride using a gradient refractive index (graded index) following three proposed profiles such as the linear, sub-linear and super-linear profiles.… read more here.
Keywords: anti reflective; optimization anti; graded index; reflective coatings ... See more keywords
Thermal emission of a two-dimensional semitransparent medium with discrete distributions of graded index
Sign Up to like & getrecommendations! Published in 2020 at "International Communications in Heat and Mass Transfer"
DOI: 10.1016/j.icheatmasstransfer.2020.104726
Abstract: Abstract The backward Monte Carlo method combined with the discrete Runge-Kutta ray-tracing technique (DRKRT) is developed to simulate the thermal emission of a two-dimensional medium with discrete distributions of graded index. Refractive index and its… read more here.
Keywords: index; thermal emission; graded index; discrete distributions ... See more keywords
Tuning light focusing with liquid crystal infiltrated graded index photonic crystals
Sign Up to like & getrecommendations! Published in 2017 at "Optics Communications"
DOI: 10.1016/j.optcom.2016.07.062
Abstract: Abstract We perform numerical analyses of tunable graded index photonic crystals based on liquid crystals. Light manipulation with such a photonic medium is explored and a new approach for active tuning of the focal distance… read more here.
Keywords: index; index photonic; photonic crystal; photonic crystals ... See more keywords
Modulation transfer function of the imaging probe using an 8.8 mm-long and 125 µm-thick graded- index short multimode fiber
Sign Up to like & getrecommendations! Published in 2017 at "Optics Communications"
DOI: 10.1016/j.optcom.2016.10.007
Abstract: Abstract We measured the modulation transfer function (MTF) of a short multimode fiber (SMMF) probe and proposed the optical model including the thin random phase screen (TRPS) to explain degradations of imaging characteristics. SMMF is… read more here.
Keywords: multimode fiber; modulation transfer; transfer function; short multimode ... See more keywords
Exact graded-index profile to produce an annular beam
Sign Up to like & getrecommendations! Published in 2020 at "Optics Communications"
DOI: 10.1016/j.optcom.2020.126037
Abstract: Abstract This work presents the exact radial refractive index profile of a graded-index lens required to produce an annular beam. The index profile variation obtained is compatible with MCVD fiber fabrication process. Moreover, we show… read more here.
Keywords: index; produce annular; graded index; annular beam ... See more keywords
New method for calculating the coupling coefficient in graded index optical fibers
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2017.11.026
Abstract: Abstract A simple method is proposed for determining the mode coupling coefficient D in graded index multimode optical fibers. It only requires observation of the output modal power distribution P(m, z) for one fiber length… read more here.
Keywords: coupling coefficient; index; method; graded index ... See more keywords
Spectroscopic and morphological studies of SiO2 graded index thin films fabricated at oblique incidence angles
Sign Up to like & getrecommendations! Published in 2020 at "Optical Materials"
DOI: 10.1016/j.optmat.2019.109560
Abstract: Abstract The present paper reports the fabrication of single layer graded index SiO2 thin films at various oblique incidence angles by using Static glancing angle deposition (GLAD) setup. These SiO2 films have been fabricated by… read more here.
Keywords: incidence; thin films; incidence angles; deposition ... See more keywords
Role of the electron blocking layer in the graded-index separate confinement heterostructure nitride laser diodes
Sign Up to like & getrecommendations! Published in 2018 at "Superlattices and Microstructures"
DOI: 10.1016/j.spmi.2018.02.016
Abstract: Abstract In this work, we investigate the role of the electron blocking layer (EBL) in laser diodes based on a graded index separate confinement heterostructure. We compare two sets of devices with very different EBL… read more here.
Keywords: electron blocking; role electron; blocking layer; laser diodes ... See more keywords
Solution processes for ultrabroadband and omnidirectional graded-index glass lenses with near-zero reflectivity in high concentration photovoltaics
Sign Up to like & getrecommendations! Published in 2018 at "Scientific Reports"
DOI: 10.1038/s41598-018-33200-9
Abstract: Concentrator photovoltaic (CPV) systems, where incident direct solar radiation is tightly concentrated onto high-efficiency multi-junction solar cells by geometric optical elements, exhibit the highest efficiencies in converting the sun’s energy into electric power. Their energy… read more here.
Keywords: index; processes ultrabroadband; glass; solution processes ... See more keywords
Observation of various bound states based on a graded index multimode fiber saturable absorber
Sign Up to like & getrecommendations! Published in 2020 at "Laser Physics Letters"
DOI: 10.1088/1612-202x/ab63da
Abstract: The formation of stable single solitons and various bound states based on a graded index multimode fiber (GIMF) is investigated experimentally for the first time. Taking advantage of the principle of nonlinear multimode interference, a… read more here.
Keywords: bound states; various bound; based graded; states based ... See more keywords