non dispersion shifted fiber (fiber optics) (NDSF)

Non Dispersion Shifted Fiber (NDSF) is a monomode fiber with special doping standardized by the International Telecommunication Union( ITU) in Recommendation G.652.

In NDSF fiber, the zero crossing of chromatic dispersion is shifted to the second optical window. This reduces the pulse broadening in this window. According to the G.652 standard, NDSF fibers have their minimum dispersion at a wavelength of 1,310 nm. The attenuation is 0.25 dB/km at 1,550 nm and the typical dispersion is 17 ps/nm with respect to one kilometer.

The NDSF fiber is used in local area networks and is suitable for data rates of 2.5 Gbps. A further reduction in dispersion can be achieved with Non Zero Dispersion Shifted Fiber( NZDSF).