Results 261 to 270 of about 10,858,201 (300)
Some of the next articles are maybe not open access.
Dispersive pulse propagation and group velocity
The Journal of the Acoustical Society of America, 1993The propagation of pulses in a dissipative medium is investigated both theoretically and experimentally. The theoretical work is based on the dissipative dispersion integral, and the measurements are made in an air-filled periodic waveguide (i.e., the dispersion is Bloch wave dispersion).
openaire +1 more source
Group velocity dispersion tailoring in optical structures
SPIE Proceedings, 1995The control of the group velocity dispersion (GVD) in the waveguiding structures may be of crucial interest in optical communications. It may be achieved controlling one of the components of GVD, the waveguide dispersion, which depends on the geometry and the refractive index profiles of the guiding structures. In this paper the waveguide dispersion in
Elvio Valentinuzzi +2 more
openaire +1 more source
Group-velocity dispersion in chirped-pulse amplifier
Acta Physica Sinica (Overseas Edition), 1996By using the pulse propagation equation in the nonlinear dispersive medium, the effects of second- and third-order group-velocity dispersion on pulse evolution in the stretching, amplification and compressing are studied when chirped pulse amplification is applied to the pulses of a width
Shen Yu-zhen +3 more
openaire +1 more source
Group velocity dispersion measurements of microstructured fibers
Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest (IEEE Cat. No.01CH37170), 2001Summary form only given. There has been great recent interest in microstructured fibers that consist of a regular arrangement of holes stretched along silica or air core. These fibers can guide light either by opening a photonic bandgap or, in the case of silica core, by total internal reflection. Microstructure fibers have unique dispersion properties
D. Ouzounov +7 more
openaire +1 more source
Phonon dispersion sheets and group velocities in GaAs
Journal of Physics: Condensed Matter, 1990Phonon frequencies on two dispersion sheets for TA modes have been determined by inelastic neutron scattering on the (001) and the (011) planes at 12 K. Phonon group velocities for these phonons have been derived. The results are used to calculate heat transport properties.
B Dorner, D Strauch
openaire +1 more source
Group-velocity dispersion in an all-pass Bragg filter
Optics Letters, 1994On the basis of previously performed theoretical analysis it is shown that a slanted volume grating acts as an all-pass filter with nonlinear dispersion when the diffracted wave is evanescent. An analytical expression for the grating transfer function applicable over a wide angular range of mutual orientation of the initial wave and grating vectors is ...
openaire +2 more sources
Energy transport in dispersive media and superluminal group velocities
Physics Letters A, 1997zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
Supercontinuum in the anomalous group-velocity dispersion region
Journal of the Optical Society of America B, 1992We 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, 2005We 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 +7 more
openaire +1 more source
Negative group-velocity dispersion using refraction
Journal of the Optical Society of America A, 1984It is shown that a negative contribution to the group-velocity dispersion always accompanies angular dispersion. We describe structures, such as slabs and prisms, that use this contribution to provide adjustable group-velocity dispersion. We discuss, in particular, considerations regarding incorporation of these structures with a laser resonator.
O. E. Martinez, J. P. Gordon, R. L. Fork
openaire +1 more source