Results 21 to 30 of about 40,507 (308)
Period-Timing Bifurcations in a Dispersion-Managed Fiber Laser With Zero Group Velocity Dispersion
IEEE Photonics Journal, 2016 We report on the numerical results of period timing bifurcations in a dispersion-managed (DM) fiber laser with zero group velocity dispersion (GVD).The fiber laser is passively mode-locked by using the nonlinear polarization rotation technique.
Qian Zhang +3 more
doaj +1 more source
High coupling efficiency to a low dispersion slow light-supporting photonic crystal waveguide [PDF]
Journal of the European Optical Society-Rapid Publications, 2013 In this paper, we design a waveguide on photonic crystal slab for propagation of low-dispersion slow light. By shifting the air holes adjacent to the waveguide, we obtain a photonic crystal waveguide with a group index of 25 in 25 nm bandwidth which ...
Moghaddam M. Khatibi +2 more
doaj +1 more source
Group velocity dispersion curves estimation based on joint processing of sound pressure and vertical particle velocity [PDF]
JASA Express LettersIt is difficult to separate and estimate the intersected group velocity dispersion curves for different normal modes when the frequency is lower than the cutoff frequency of water column.
Guangxue Zheng +3 more
doaj +1 more source
Fully nonlinear inversion of fundamental mode surface waves for a global crustal model [PDF]
, 2007 We use neural networks to find 1-dimensional marginal probability density functions (pdfs) of global crustal parameters. The information content of the full posterior and prior pdfs can quantify the extent to which a parameter is constrained by the data.
Meier, U. +2 more
core +1 more source
Alumina coating for dispersion management in ultra-high Q microresonators
APL Photonics, 2020 Silica optical microspheres often exhibit ultra-high quality factors, yet their group velocity dispersion, which is crucial for nonlinear optics applications, can only be coarsely tuned.
Marvyn Inga +7 more
doaj +1 more source
New Journal of Physics, 2022 The group velocity of an optical beam in free space is usually considered to be equal to the speed of light in vacuum. However, it has been recently realized that, by structuring the beam’s angular and temporal spectra, one can achieve well pronounced ...
P Hildén +3 more
doaj +1 more source
Which group velocity in a dispersive medium ? [PDF]
The European Physical Journal Plus, 2011 To be submitted on ...
El Gawary O +2 more
openaire +3 more sources
ChandraObservations of Low Velocity Dispersion Groups [PDF]
The Astrophysical Journal, 2005 Deviations of galaxy groups from cluster scaling relations can be understood in terms of an excess of entropy in groups. The main effect of this excess is to reduce the density and thus luminosity of the intragroup gas. Given this, groups should also should show a steep relationship between X-ray luminosity and velocity dispersion.
Helsdon, Stephen F. +2 more
openaire +2 more sources
Radial Velocity Dispersions of Star Groups in M67
Open Astronomy, 2016 AbstractHigh-precision measurements of radial velocities of the M67 cluster members are used to calculate the radial-velocity dispersions in the stellar groups found earlier in the cluster’s corona. The previously detected feature in one of the groups (Group 60) consisting of stars with almost identical space velocities was confirmed.
Vereshchagin S. V., Chupina N. V.
openaire +3 more sources
Numerical Simulation of Three-Core Photonic Crystal Fiber With Large Group-Velocity Dispersion
IEEE Access, 2020 The three-core photonic crystal fiber (TC-PCF) is proposed to obtain large group-velocity dispersion (GVD) because of the coupling effects between the fundamental modes (FMs) of the central core and higher-order modes (HOMs) of the two side cores.
Jianfang Yang +3 more
doaj +1 more source