Fiber Optic Wiki

Fiberoptic lighting design applications

September 8, 2011

The quality of light is much weaker than traditional lighting, so some believe fiberoptic lighting is most useful in creating a mood.

Nondispersion-Shifted Fiber

September 7, 2011

This fiber is also known as standard SMF and is the most commonly deployed fiber. This fiber has a simple step-index structure and is optimized for operation in the 1310-nm band. It has a zero-dispersion wavelength at 1310 nm and can also operate in the 1550-nm band, but it is not optimized for this region.

Low Water Peak Nondispersion-Shifted Fiber

September 7, 2011

The legacy ITU-T G.652 standard SMFs are not optimized for WDM applications due to the high attenuation around the water peak region. ITU G.652.C-compliant fibers offer extremely low attenuation around the OH peaks.

Dispersion-Shifter Fiber

September 7, 2011

Conventional SMF has a zero-dispersion wavelength that falls near the 1310-nm window band. SMF shows high dispersion values over the range between 1500 nm and 1600 nm (third window band). The trend of shifting the operating transmission wavelength from 1310 nm to 1550 nm initiated the development of a fiber type called dispersion-shifted fiber (DSF). DSF exhibits a zero-dispersion value around the 1550-nm wavelength where the attenuation is minimum.

1550-nm Loss-Minimized Fiber

September 7, 2011

The ITU-T G.654 fiber is optimized for operation in the 1500-nm to 1600-nm region.

Nonzero Dispersion Shifted Fiber

September 7, 2011

Using nonzero dispersion-shifted fiber (NZDSF) can mitigate nonlinear characteristics. NZDSF fiber overcomes these effects by moving the zero-dispersion wavelength outside the 1550-nm operating window. The practical effect of this is to have a small but finite amount of chromatic dispersion at 1550 nm, which minimizes nonlinear effects, such as FWM, SPM, and XPM, which are seen in the dense wavelength-division multiplexed (DWDM) systems without the need for costly dispersion compensation.

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