Digital coherent transmission technology
An advanced optical transmission method that uses polarity multiplexing, phase modulation, and other modulation techniques to increase frequency utilization efficiency, and combines coherent reception and digital signal processing to greatly increase reception sensitivity.
 Dispersion-shifted fiber in L-band
Dispersion-shifted fiber (DSF) is a type of single-mode optical fiber that is tailored to shift the zero-dispersion wavelength from 1,310 nm to 1,550 nm, a wavelength in which the transmission loss is smaller. It is used in long-haul transmissions.The L-band is the optical wavelength range of 1,565 nm to 1,625 nm used in WDM transmissions over DSF.
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Date: 21 June, 2012
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