US 7,321,734 B2
Digital synthesis of readily compensated optical signals
Kim B. Roberts, Nepean (Canada); and Julian Fells, Epping (United Kingdom)
Assigned to Nortel Networks Limited, St. Laurent, Quebec (Canada)
Filed on Jul. 29, 2004, as Appl. No. 10/902,604.
Prior Publication US 2006/0024069 A1, Feb. 02, 2006
Int. Cl. H04B 10/04 (2006.01)
U.S. Cl. 398—193  [398/159; 398/194] 9 Claims
OG exemplary drawing
 
1. A method of mitigating effects of dispersion in an optical link, the method comprising steps of:
synthesizing a pair of digital sample streams representing a target optical E-field having a spectrum comprising a set of two or more spectral components arranged at frequency intervals selected such that convolution of the spectrum with itself yields a signal having a respective beat term that contains phase information of a unique one of the spectral components; and
driving a complex optical modulator in accordance with the synthesized digital sample streams.