Results 261 to 270 of about 10,332,383 (291)

Supercontinuum in the anomalous group-velocity dispersion region

Journal of the Optical Society of America B, 1992
We compute numerically the time-domain characteristics and the spectral distribution of an intense femtosecond pulse with its center frequency in the anomalous group-velocity dispersion region, that is, propagating in a one-spatial-dimension Kerr medium (optical fiber).
Barry Gross, Jamal T. Manassah
openaire   +1 more source

Huge group-velocity dispersion in a photonic crystal

SPIE Proceedings, 2005
We investigated the group-velocity dispersion of a one dimensional uniform photonic crystal by the optical transmission method. For application in optical communications, the wavelength should be near one of the two edges of a photonic bandgap. Four kinds of dispersion-compensation may be obtained with a photonic crystal.
Zhengbiao Ouyang, Yanyan Cai, Qingsheng Meng, Yali Lu, Yiling Sun, Dengguo Zhang, Shuangchen Ruan, Jingzhen Li   +7 more
openaire   +1 more source

Causality and acoustic group velocity in dispersive media

The Journal of the Acoustical Society of America, 2005
This talk examines two specific issues related to causality and the group velocity of acoustic pulses in dispersive media. First, the causal prediction of group velocity from attenuation with finite-bandwidth Kramers-Kronig (K-K) relations is discussed.
openaire   +1 more source

Group velocity and nonlinear dispersive wave propagation

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1973
Abstract By the use of a Hamiltonian formulation, a basic group velocity is defined as the derivative of frequency with respect to wavenumber keeping action density constant, and is shown to represent an incremental action velocity in the general nonlinear case.
openaire   +2 more sources

Weakly nonlinear dispersive waves: group velocity

Journal of Plasma Physics, 1982
For slowly varying wave trains in a linear system, it is known that a quantity proportional to the square of the amplitude propagates with the group velocity. It is shown here, by considering a specific problem of longitudinal waves in a hot electron-plasma and using an asymptotic analysis, that this result continues to be valid even when weak ...
openaire   +1 more source

Retrieving S-wave velocity from surface wave multimode dispersion curves with DispINet

Journal of Applied Geophysics, 2021
Lei Fu, Lei Pan, Sheng Dong
exaly  

CWT-Based Method for Extracting Seismic Velocity Dispersion

IEEE Geoscience and Remote Sensing Letters, 2022
Yijie Zhang, Haixia Zhao
exaly  

Effects of Velocity and Permeability on Tracer Dispersion in Porous Media

Applied Sciences (Switzerland), 2021
Pengxiang Diwu, Zhenjiang You, Yulong Yang   +2 more
exaly  

GROUP-VELOCITY DISPERSION

1989
openaire   +1 more source

Estimation of the Longitudinal Dispersion Coefficient Using the Velocity Profile in Natural Streams

Journal of Hydraulic Engineering, 2004
Kyong Oh Baek, Il Won Seo
exaly