Results 31 to 40 of about 532,284 (336)
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
Surface-wave group-delay and attenuation kernels [PDF]
, 2006 We derive both 3-D and 2-D Fréchet sensitivity kernels for surface-wave group-delay and anelastic attenuation measurements. A finite-frequency group-delay exhibits 2-D off-ray sensitivity either to the local phase-velocity perturbation δc/c or to its ...
Dahlen, F. A., Zhou, Ying
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
Poynting vector, energy density and energy velocity in anomalous dispersion medium [PDF]
, 2001 The Poynting vector, energy density and energy velocity of light pulses propagating in anomalous dispersion medium (used in WKD-like experiments) are calculated.
A. Dogariu +9 more
core +3 more sources
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
Parametric study of the behaviour of group velocity dispersion in optical pulse compression [PDF]
, 1992 An optical pulse compressor is investigated over a large range of compression factors, fiber lengths and laser powers. The given theory for zero group velocity dispersion is valid over the investigated range of grating-prism distances.
Ernst, G.J., Mols, R.F.X.A.M.
core +3 more sources
Non-trivial scaling of self-phase modulation and three-photon absorption in III-V photonic crystal waveguides [PDF]
, 2009 We investigate the nonlinear response of photonic crystal waveguides with suppressed two-photon absorption. A moderate decrease of the group velocity (~ c/6 to c/15, a factor of 2.5) results in a dramatic (30x) enhancement of three-photon absorption well
Aitchison +42 more
core +1 more source
Analysis of terahertz generation using tilted-pulse-fronts
, 2018 A 2-D spatio-temporal analysis of terahertz generation by optical rectification of tilted-pulse-fronts is presented. Closed form expressions of terahertz transients and spectra in two spatial dimensions are furnished in the undepleted limit. Importantly,
Kärtner, Franz X., Ravi, Koustuban
core +2 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
, 1999 Group velocity and group velocity dispersion for a wave packet in vectorial discrete Klein-Gordon models are obtained by an expansion, based on perturbation theory, of the linear system giving the dispersion relation and the normal modes.
Barbi, Maria +2 more
core +3 more sources