Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q8069441> ?p ?o }
Showing triples 1 to 24 of
24
with 100 triples per page.
- Q8069441 subject Q8447544.
- Q8069441 abstract "In a single-mode optical fiber, the zero-dispersion wavelength is the wavelength or wavelengths at which material dispersion and waveguide dispersion cancel one another. In all silica-based optical fibers, minimum material dispersion occurs naturally at a wavelength of approximately 1300nm. Single-mode fibers may be made of silica-based glasses containing dopants that shift the material-dispersion wavelength, and thus, the zero-dispersion wavelength, toward the minimum-loss window at approximately 1550nm. The engineering tradeoff is a slight increase in the minimum attenuation coefficient. Such fiber is called dispersion-shifted fiber.Another way to alter the dispersion is changing the core size and the refractive indices of the material of core and cladding. Because fiber optic materials are already highly optimized for low scattering and high transparency alternative ways to change the refractive index were investigated. As a straight forward solution tapered fibers and holey fibers or photonic crystal fibers (PCF) were produced. Essentially they replace the cladding by air. This improves the contrast of refractive indices by a factor of 10. Therefore the effective index is changed, especially for longer wavelengths. This type of refractive index change versus wavelength due to different geometry is called waveguide dispersion.As these narrow waveguides (~1-3 µm core diameter) are combined with ultrashort pulses at the zero-dispersion wavelength pulses are not instantly destroyed by dispersion. After reaching a certain peak power within the pulse the non-linear refractive index starts to play an important role leading to frequency generation processes like self-phase modulation (SPM), modulational instability, soliton generation and soliton fission, cross phase modulation (XPM) and others. All these processes generate new frequency components, meaning that input light with narrow bandwidth expands into a wide range of new colours, through a process called supercontinuum generation.The term is also used, more loosely, in multi-mode optical fiber. There, it refers to the wavelength at which the material dispersion is minimum, i.e. essentially zero. This is more accurately called the minimum-dispersion wavelength.".
- Q8069441 wikiPageWikiLink Q11233438.
- Q8069441 wikiPageWikiLink Q116269.
- Q8069441 wikiPageWikiLink Q1256244.
- Q8069441 wikiPageWikiLink Q162.
- Q8069441 wikiPageWikiLink Q17104082.
- Q8069441 wikiPageWikiLink Q1781857.
- Q8069441 wikiPageWikiLink Q182893.
- Q8069441 wikiPageWikiLink Q183467.
- Q8069441 wikiPageWikiLink Q3503585.
- Q8069441 wikiPageWikiLink Q41364.
- Q8069441 wikiPageWikiLink Q4335523.
- Q8069441 wikiPageWikiLink Q5124919.
- Q8069441 wikiPageWikiLink Q5188186.
- Q8069441 wikiPageWikiLink Q5282578.
- Q8069441 wikiPageWikiLink Q6128993.
- Q8069441 wikiPageWikiLink Q7049090.
- Q8069441 wikiPageWikiLink Q7268444.
- Q8069441 wikiPageWikiLink Q844471.
- Q8069441 wikiPageWikiLink Q8447544.
- Q8069441 wikiPageWikiLink Q902086.
- Q8069441 comment "In a single-mode optical fiber, the zero-dispersion wavelength is the wavelength or wavelengths at which material dispersion and waveguide dispersion cancel one another. In all silica-based optical fibers, minimum material dispersion occurs naturally at a wavelength of approximately 1300nm.".
- Q8069441 label "Zero-dispersion wavelength".