anomalous dispersion

anomalous dispersion

[ə′näm·ə·ləs dis′pər·zhən]
(optics)
Extraordinary behavior in the curve of refractive index versus wavelength which occurs in the vicinity of absorption lines or bands in the absorption spectrum of a medium.
References in periodicals archive ?
We have shown the soliton-effect self-SC in the fiber "directly", without dispersive delay line, in the fiber with anomalous dispersion for different initial pulses.
Anomalous dispersion widely exists in solute transport in ground water or in other porous media [1-7], which makes it difficult to simulate solute transport by traditional advection-dispersion equation.
He discusses molecular structure and electronic structure, including x-ray and electron spectroscopy methods; the crystallographic structure and microstructure determination, including diffraction, reflectometry, and scattering; the imaging and other real space mapping methods based on x-rays; the anomalous dispersion of chemical elements and uses in elemental, chemical, and orbital x-ray contrast variation; the surface and bulk sensitivity of the methods; organic and bio-organic samples; x-ray electrochemical case studies of batteries, fuel cells, and photoelectrochemical cells; and how x-ray based data can match the conductivity data from some materials.
Pulses in the CDPF are influenced alternatively by nonlinear effect and group velocity dispersion (GVD) effect in space and adiabatic optical soliton transmission can be maintained and evolved in anomalous dispersion region.
Stentz, "Visible continuum generation in air-silica microstructure optical fibers with anomalous dispersion at 800 nm," Optics Letters, vol.
Also, in case [gamma] < 0 we have normal dispersion and in case [gamma] > 0 anomalous dispersion. The parameter [H.sub.2] is related to the velocity change gradient; the higher the value of [H.sub.2], the more rapid is the transition from the low frequency velocity to the bounding velocity.
This phenomenon, when increasing the wave frequency slow rate decreases, called anomalous dispersion. It is known that the phase delay of the line depends on the dielectric constant of the medium in which the wave propagates.
Sahrai, "Switching from normal to anomalous dispersion via coherent field," Journal of Optics B, vol.
Wang et al., "Passive harmonically mode-locked Yb3+doped fiber laser free from anomalous dispersion," IEEE Photonics Technology Letters, vol.
There is anomalous dispersion regions when 2.25 < E <2.95 eV and E > 4.85 eV, as well as normal dispersion when 2.95 < < 3.45 eV for doped samples.
2(a), when the pump pulse with the wavelength of 785 nm and the average power of 300 mW polarize along the fast axis, the central wavelength of pump pulse lies on the positive slope of the PM-PCF dispersion profile in the anomalous dispersion region, and the soliton is formed due to the interplay between the negative dispersion and the self-phase modulation (SPM).

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