KSIĄŻKI POWIĄZANE ZE SŁOWEM «GROUP VELOCITY»
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1
Group velocity in a multi-dimensional space
Phase and group velocities of isotropic and anisotropic waves are expressed analytically by the frequency-wave number vector relations and graphically with frequency curves for a multiple-dimensional space.
2
Scattering, Two-Volume Set: Scattering and Inverse ...
The direction of the group velocity U = V^co is given by the solid arrows. V*=n 1 +
-Vi. dk k (75) where Vi is the component of the gradient perpendicular to the
direction of propagation. Using spherical coordinates in wave-number space, the
...
E R Pike, E. R. Pike, Pierre C. Sabatier, Pierre Celestin Sabatier,
2001
The variation of the magnitude of the group velocity with frequency is discussed
in Section 8.4 for longitudinal propagation, and in Section 11.4 for transverse
propagation. The behaviour of the magnitude of the group velocity is treated in ...
4
The Solid Earth: An Introduction to Global Geophysics
The group velocity of surface waves is the velocity at which surface-wave energy
of a given frequency travels. It is a constant for a given frequency. Therefore on
Fig. 4.5(a) straight lines passing through the origin mark the surface-wave signal
...
5
Supercontinuum Generation in Optical Fibers
Calculated group-velocity profiles for the five fibres listed in Table 7.1. For each
fibre the vertical lines indicate the experimentally measured location of a strong
peak on the short-wavelength side of the output supercontinuum spectrum.
J. M. Dudley, J. R. Taylor,
2010
6
Slow Light Photonic Crystal Line-defect Waveguides
The group velocity of the gap guided mode is a function of structural parameters.
It can even have different sign as shown in Fig. 3.1 by even.a and even.b modes.
In the presented waveguide the folded branch of index guided mode has ...
7
Coherence and Quantum Optics VIII: Proceedings of the ...
Superluminal light pulse propagation is observed at a negative group velocity of -
c/315 through an atomic medium with little pulse distortion. Experimentally, a
pulse propagating through the atomic vapor cell has its peak reaching the exit
side ...
N.P. Bigelow, J.H. Eberly, C.R. Stroud Jr.,
2004
8
Fast Light, Slow Light and Left-Handed Light
The concept of group velocity was evidently first introduced by William Rowan
Hamilton in 1839 [17]. John Scott Russell, in his paper reporting the first
observation of soliton water waves in 1844 [18], may also have been the first to
observe ...
9
Time and Matter: Venice, Italy, 11-17 August 2002 : ...
Experimentally, a light pulse propagating through the atomic vapor cell has its
peak reaching the exit side before entering it, resulting in a negative transit time,
and negative group velocity. We further review a recently proposed operational ...
10
Electromagnetic and Optical Pulse Propagation 2: Temporal ...
The. Group. Velocity. Approximation. Because of its mathematical simplicity and
direct physical interpretation, the group velocity approximation has gained
widespread use in the physics, engineering, and mathematical science
communitites.
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Fiber guiding at the Dirac frequency beyond photonic bandgaps
... Dirac equation for relativistic particles: −ivD(σx∂x+σy∂y)Ψ=(ω−ωD)Ψ, where vD is the group velocity, ωD/2π is the Dirac frequency, σx and ... «Nature.com, Cze 15»
Ultrafast Dispersing Prisms
The LaKL21 model features a group velocity dispersion (GDV) of 600 fs2/cm. An SF10 model features a GDV of 1600 fs2/cm, while a UV fused ... «Photonics.com, Maj 15»
Atomic gas puts the brakes on light in optical fibres
... not the light's photons that are slowed but rather the envelope of their collective wave, which is represented by the photons' "group velocity". «physicsworld.com, Maj 15»
Femtosecond Pulses: Control Is Key to New Discoveries
This is known as positive group velocity dispersion (GVD). “So the laser pulses are often pre-chirped with negative GVD before they leave the laser head, ... «Photonics.com, Maj 15»
Focusing ultrashort laser pulses with achromatic doublets
The three effects that can increase pulse duration and spot size, and thus cause pulse intensity to decrease, are group velocity dispersion ... «SPIE Newsroom, Maj 15»
Lasers for Microscopy Major Trends
Moreover, this new OPO ensures shorter pulse width at the sample by means of a built-in group velocity dispersion precompensator. This is factory set to offset ... «Photonics.com, Kwi 15»
Hollow-core photonic crystal fibers for high-power, ultrafast lasers
IC Kagome HC-PCFs exhibit outstanding guidance and delivery properties, low waveguide dispersion, and anomalous group velocity ... «SPIE Newsroom, Mar 15»
Ultrabroadband mid-IR frequency combs show promise for standoff …
... by using special 'chirped' dielectric mirrors in the OPO resonator, enabling compensation of group velocity variation over the whole spectrum. «SPIE Newsroom, Mar 15»
Diverse Applications Drive Lasers for Multiphoton Microscopy
With pulse-width options shorter than 75 fs and optional variable group velocity dispersion precompensation, Ti:S lasers deliver both the ... «Photonics.com, Mar 15»
GATE ECE/EC Answer Key 2015 Download -1st February 2015 …
Wave equation, Poynting vector. Plane waves: propagation through various media; reflection and refraction; phase and group velocity; skin ... «All India Roundup, Sty 15»