Results 271 to 280 of about 532,284 (336)
Some of the next articles are maybe not open access.
Some effects of group-velocity dispersion on parametric interactions
IEEE Journal of Quantum Electronics, 1970J. Armstrong, S. S. Jha, N. Shiren
semanticscholar +3 more sources
Femtosecond group-velocity dispersion in optics
Optical Society of America Annual Meeting, 1990Group velocity dispersion (GVD) is a well-known phenomenon that causes pulse broadening of femtosecond pulses propagating through dispersive materials. Femtosecond spectroscopy is becoming commonplace, and one must consider the effect of GVD in optical components such as mirrors, lenses, prisms, glass plates, glass cells, dielectric-coated mirrors ...
Yoshihiro Takiguchi, R. R. Alfano
openaire +1 more source
Ultrasound in Medicine and Biology, 2020
We report shear wave phase and group velocity, dispersion and attenuation in oil-in-gelatin viscoelastic phantoms and in vivo liver data. Moreover, we measured the power law coefficient from each dispersion curve and used it, together with the shear wave
J. Ormachea, K. Parker
semanticscholar +1 more source
We report shear wave phase and group velocity, dispersion and attenuation in oil-in-gelatin viscoelastic phantoms and in vivo liver data. Moreover, we measured the power law coefficient from each dispersion curve and used it, together with the shear wave
J. Ormachea, K. Parker
semanticscholar +1 more source
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
openaire +2 more sources
, 2017
We use the generalized Lugiato-Lefever model to investigate the phenomenon of Kerr optical frequency comb generation when group-velocity dispersion is null. In that case, the first dispersion term that plays a leading role is third-order dispersion.
J. H. Talla Mbé, C. Milián, Y. Chembo
semanticscholar +1 more source
We use the generalized Lugiato-Lefever model to investigate the phenomenon of Kerr optical frequency comb generation when group-velocity dispersion is null. In that case, the first dispersion term that plays a leading role is third-order dispersion.
J. H. Talla Mbé, C. Milián, Y. Chembo
semanticscholar +1 more source
Group velocity and dispersion in nonlinear-optical fibers
Optics Letters, 1991Many of the nonlinear effects being studied in optical fibers depend critically on the dispersion characteristics of the fiber. We generalize the scalar form of Brown's identity for group velocity in a linear waveguide to deal with arbitrary nonlinearity and use this generalization to show that the dispersion characteristics of a step-index fiber at ...
R A, Sammut, C, Pask
openaire +2 more sources
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
Weakly nonlinear dispersive waves: group velocity
Journal of Plasma Physics, 1982For 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
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 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