Results 251 to 260 of about 96,778 (297)

Dispersion in step-index silicone-clad fibers

Applied Optics, 1979
Optical properties of materials making up multimode step-index fibers with inorganic glass cores and silicone cladding have been examined using bulk sample measurement techniques. Mode dispersion and numerical aperture for the wavelength range 0.4-1.4 microm for two fibers are reported.
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Dispersion of the nonlinear refractive index in sapphire

Optics Letters, 2004
The nonlinear refractive index, n2, of sapphire was experimentally measured in the 550-1550-nm wavelength range by use of a picosecond Z-scan technique. It was found that in this spectral region the value of n2 decreases monotonically from approximately 3.3 x 10(-16) to approximately 2.8 x 10(-16) cm2/W.
Arkady, Major, Fumiyo, Yoshino, Irkalis, Nikolakakos, J Stewart, Aitchison, Peter W E, Smith   +4 more
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Refractive Index and Dispersion

2014
The ISO 9802 Raw Optical Glass–Vocabulary and ISO 12123 Specification of Raw Optical Glass define refractive index as follows: “Ratio of the velocity of the electromagnetic waves at a specific wavelength in a vacuum to the velocity of the waves in the medium.” Dispersion denotes the effect that refractive index changes with wavelength.
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Dispersion Inversion in High Index Contrast AlGaAs-Nanowires

2007 Conference on Lasers and Electro-Optics (CLEO), 2007
We present numerical simulations of the temporal dispersion in high contrast AlGaAs nanowires and predict the inversion of the group velocity dispersion for sub-micron sized wires.
J. Meier, M. Mojahedi, J. S. Aitchison
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The index of dispersion

1984
The index of dispersion is a statistic commonly used to detect departures from randomness of count data. Under the hypothesis of randomness, the true distribution of this statistic is unknown. The accuracy of large sample approximations is assessed by a Monte Carlo simulation.
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Reverse dispersion fiber with depressed core-index profile for dispersion-managed fiber pairs

Optics Communications, 2005
Abstract A reverse dispersion fiber (RDF) with depressed core-index profile has been developed successfully by using plasma chemical vapor deposition (PCVD) process. The fabricated RDF has a core-effective-area of 45 μm 2 , a dispersion of −19.65 ps/nm/km and a dispersion slope of −0.132 ps/nm 2 /km while maintaining the low bending induced ...
Xiaoqiang Jiang, Ruichun Wang
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Refractive index dispersions of liquid crystals

Optical Engineering, 1993
Refractive indices of two nematic liquid crystals, 5CB and 5PCH, were measured from the 400- to 800-nm region at various temperatures. Results fit the three-band model well. Through comparisons, the contributions of σ and π electrons to the refractive indices and birefringence of uniaxial liquid crystals are evaluated quantitatively.
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Zero dispersion in step index slab waveguides

Journal of Lightwave Technology, 1999
Specific features of the dispersion in step index slab waveguides, such as zero waveguide dispersion and zero group delay difference between modes, are shown to be described by normalized expressions involving two normalized structure parameters only.
G. Pandraud, O. Parriaux
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The Index-of-Dispersion Test Revisited

1996
In quantitative ecology the classical index-of-dispersion is widely used for testing the hypothesis of spatial randomness. However, spatial aggregation of individuals is often observed in field experiments, so that the test will frequently reject the hypothesis without indicating any alternatives.
D. Pfeifer, H. Ortleb, U. Schleier-Langer, H.-P. Bäumer   +3 more
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Refractive index dispersion of chalcopyrite crystals

Journal of Physics D: Applied Physics, 1980
The one-gap electronic dispersion model of Wemple and DiDomenico (1969) has been extended, using physically meaningful parameters, to take into account additional dispersion of refractive indices near the lowest energy gap, and applied to the case of chalcopyrite crystals. Dispersion parameters of some chalcopyrite crystals are presented.
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