dispersion-shifted fiber

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dispersion-shifted fiber

A singlemode optical fiber that has been designed to reduce chromatic dispersion. The fiber core is fabricated in several layers with different refractive indices running in parallel throughout its length. Zero-dispersion-shifted fiber has zero chromatic dispersion at 1550 nm. It is no longer manufactured, because it causes interference in WDM transmission. Nonzero-dispersion-shifted fiber is designed for WDM. It has zero dispersion near 1500 nm and beyond 1600 nm, which provides lower dispersion in the 1550 nm range. See graded-index fiber, step index fiber and dispersion.
References in periodicals archive ?
Oguchi, "Wide wavelength band (1535-1560 nm and 1574-1600 nm), 28 x 10Gbit/s WDM transmission over 320 km dispersion shifted fiber," Electronics Letters, Vol.
An important observation which can be made from Figure 4, Figure 10, Figure 15 and Figure 20 is that although the trends of ASE noise and FWM noise are opposite, still the total optical noise has followed the trend of FWM emphasizing that FWM is the major contributor of noise in WDM fiber optic system with inline optic amplifiers and non-zero dispersion shifted fiber in the anomalous regime (NZDSF+) operating at 1.
As an example, by using an adjustable external cavity laser as soliton source, a soliton transmission was implemented over 8000 km of dispersion shifted fiber through a recirculating amplified loop.