Results 71 to 80 of about 354,066 (197)

Design of Endlessly Single Mode Photonic Crystal Fibers with Desirable Properties using HC-EDA Algorithm

Iranian Journal of Electrical and Electronic Engineering, 2015
In this article, Hill Climbing (HC) and Estimation of Distribution Algorithm (EDA) are integrated to produce a hybrid intelligent algorithm for design of endlessly Single Mode Photonic Crystal Fibers (SMPCFs) structure with desired properties over the C ...
M. Pourmahyabadi
doaj  

Reversed dispersion slope photonic bandgap fibers for broadband dispersion control in femtosecond fiber lasers

Optics Express, 2008
Higher-order-mode solid and hollow core photonic bandgap fibers exhibiting reversed or zero dispersion slope over tens or hundreds of nanometer bandwidths within the bandgap are presented. This attractive feature makes them well suited for broadband dispersion control in femtosecond pulse fiber lasers, amplifiers and optical parametric oscillators. The
Z, Várallyay, K, Saitoh, J, Fekete, K, Kakihara, M, Koshiba, R, Szipocs   +5 more
openaire   +2 more sources

Accurate Chromatic Dispersion Characterization of Photonic Integrated Circuits

IEEE Photonics Journal, 2012
An accurate technique to characterize chromatic dispersion and its slope versus wavelength is reported. The method is based on a heterodyne Mach-Zehnder interferometer, which is immune to thermal phase noise by using a counterpropagating reference beam ...
S. Mas, J. Matres, J. Marti, C. J. Oton
doaj   +1 more source

Heavily Germanium-Doped Silica Fiber With a Flat Normal Dispersion Profile

IEEE Photonics Journal, 2015
A heavily germanium-doped (Ge-doped) silica fiber with a four-layer refractive index profile is proposed to obtain all normal flat dispersion property. The waveguide dispersion in the fiber can be modified by adjusting the fiber parameters, including the
C. C. Wang, M. H. Wang, J. Wu
doaj   +1 more source

Imaging the formation of high-energy dispersion anomalies in the actinide UCoGa$_5$

, 2012
We use angle-resolved photoemission spectroscopy (ARPES) to image the emergence of substaintial dispersion anomalies in the electronic renormalization of the actinide compound UCoGa$_5$ which was presumed to belong to a conventional Fermi liquid family ...
Das, Tanmoy, Durakiewicz, Tomasz, Graf, Matthias J., Joyce, John J., Sarrao, John L., Zhu, Jian-Xin   +5 more
core   +2 more sources

Impact of shear wave dispersion slope analysis for assessing the severity of myocarditis. [PDF]

Sci Rep, 2022
Amioka N, Takaya Y, Nakamura K, Kondo M, Akazawa K, Ohno Y, Ichikawa K, Nakayama R, Saito Y, Akagi S, Miyoshi T, Yoshida M, Morita H, Ito H.   +13 more
europepmc   +1 more source

Beryllium abundances in metal-poor stars

, 2008
We have determined beryllium abundances for 25 metal-poor stars based on the high resolution and high signal-to-noise ratio spectra from the VLT/UVES database.
Allen, Allende Prieto, Alonso, Alonso, Anders, Anstee, Anstee, Asplund, Asplund, Balachandran, Barklem, Bell, Boesgaard, Boesgaard, Boesgaard, Cavallo, Chmielewski, Dekker, Duncan, ESA, Fuhrmann, Fulbright, Fulbright, G. Zhao, García López, García Pérez, Gilmore, Gratton, Higdon, Hinkle, J. R. Shi, Johnson, Jonsell, K. F. Tan, King, Kiselman, Kiselman, Korn, Kurucz, Kurucz, Magain, Molaro, Nissen, Nissen, Parizot, Parizot, Parizot, Pasquini, Pasquini, Pasquini, Primas, Primas, Ramaty, Rebolo, Reeves, Shetrone, Shi, Smiljanic, Suzuki, Takeda, Thomas, Tolstoy, Valle, Wiese, Yi   +64 more
core   +1 more source

Shear–Gravity Transition Determines the Steep Velocity Dispersion–Size Relation in Molecular Clouds: Confronting Analytical Formula with Observations

The Astrophysical Journal Letters
The velocity dispersion–size relation ( σ _v  ∼  R ^β ) is a crucial indicator of the dynamic properties of interstellar gas, where the slope is considered as β  ∼ 0.5. Recent observations reveal a steep velocity dispersion–size relation with the slope β
Yi-Heng Xie, Guang-Xing Li
doaj   +1 more source

Design of Single Mode Photonic Crystal Fiber with Outstanding Characteristics of Confinement Loss and Chromatic Dispersion over S to L Communication Band

Iranian Journal of Electrical and Electronic Engineering, 2016
In this article, a novel structure of photonic crystal fiber with nearly zero ultra-flattened chromatic dispersion and ultra-low confinement loss is presented.
R. Sanjari, M. pourmahyabadi
doaj  

Fermi liquid interactions and the superfluid density in d-wave superconductors

, 2002
We construct a phenomenological superfluid Fermi liquid theory for a two-dimensional d-wave superconductor on a square lattice, and study the effect of quasiparticle interactions on the superfluid density.
A. Hosseini, A. I. Larkin, A. Kaminski, A. Kaminski, A. Paramekanti, A. Paramekanti, A. Paramekanti, A.C. Durst, A.I. Larkin, A.J. Leggett, A.J. Leggett, A.J. Millis, Arun Paramekanti, B. R. Boyce, C. Panagopoulos, D.-H. Lee, D.L. Feng, E.W. Carlson, H. Ding, J. Mesot, K. Aoi, K. Krishana, L. Benfatto, M. Chiao, M.B. Walker, M.R. Norman, Mohit Randeria, O. Waldmann, S.-F. Lee, T. Jacobs, W.N. Hardy, X.-G. Wen, Y.J. Uemura   +32 more
core   +1 more source