Results 281 to 290 of about 54,131 (295)
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Tuning group-velocity dispersion by optical force
Optics Letters, 2013We propose an optomechanical approach for dispersion dynamic tuning and microengineering by taking advantage of the optical force in nano-optomechanical structures. Simulations of a suspended coupled silicon waveguide show that the zero-dispersion wavelength can be tuned by 40 nm by an optical pump power of 3 mW.
Wei C, Jiang, Qiang, Lin
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Group velocity dispersion in asymmetric slab guide
Applied Optics, 1989Calcul de la dispersion de la vitesse de groupe dans les guides d'onde multicouches asymetriques a fort ...
A, Dienes, Y, Peng, A, Knoesen
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Group-velocity dispersion in photonic crystal fibers
Optics Letters, 1998The dispersion properties of photonic crystal fibers are calculated by expression of the modal field as a sum of localized orthogonal functions. Even simple designs of these fibers can yield zero dispersion at wavelengths shorter than 1.27 mum when the fibers are single mode, or a large normal dispersion that is suitable for dispersion compensation at ...
D, Mogilevtsev, T A, Birks, P S, Russell
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Pulse Dispersion and Pulse Velocity
1996Any physically consistent setting up of a pulse problem should incorporate three basic components: a source of the perturbation, a medium of propagation and a receiver spatially separated from the source. To obtain a reproducible experiment one should eliminate all other sources of perturbations, and initiate the signal in the medium at rest at a ...
Mark Kelbert, Igor Sazonov
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Group-velocity-dispersion-compensated propagation of short pulses in dispersive media
Optics Letters, 1996An optical scheme based on a single angularly dispersive element is proposed for canceling group-velocity dispersion for pulse propagation in dispersive media. It is demonstrated experimentally that a pulse duration of 100 fs is preserved throughout the travel of a 248-nm-pulse through a 75-mm-long fused-silica slab.
S, Szatmári, P, Simon, M, Feuerhake
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Dispersion by random velocity fields
Journal of Fluid Mechanics, 1975A simple approximation is proposed for the problem of the dispersion of marked particles in an incompressible fluid in random motion when the probability distribution of the velocity field is taken as Gaussian, homogeneous, isotropic, stationary and of zero mean.
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On the Local Velocity Dispersions
1992A new formula for the ratio of the planar velocity dispersions containing an asymmetric-drift term is proposed. It yields a good agreement with the flat rotation curve of the Galaxy.
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Velocity dispersion in water-saturated granular sediment
The Journal of the Acoustical Society of America, 2000Recent experiments in the Gulf of Mexico have yielded a wealth of information on the environmental conditions and geoacoustic response of a uniform sand stratum immediately beneath the seafloor. A comparison of p-wave velocities measured at low (125 Hz) and high (11–50 kHz) frequencies in this layer indicates that there is a significant amount of ...
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