A vast majority of optical fiber infrastructure deployed today utilizes 10 Gb/s
transmission technology which is falling short of demands for current communication
networks. To fulfill the ever increasing needs of bandwidth, the research trend since past
few years has been in the direction of increasing the per channel data rate to ≥ 40 Gb/s.
The transmission of optical pulses over ≥ 40 Gb/s data rates greatly suffers from
degradations arising from interaction of dispersion and optical fiber nonlinearity. The
work presented in this thesis focuses on the development and evaluation of a novel
electronic signal processing technique that can undo the degradations already caused by
the interaction between dispersion and intra-channel nonlinearities. The proposed
technique tends to compensate degrading nonlinear effects by incorporating the
knowledge of the neighboring bits and exploiting the fact that for a given bit pattern, the
nonlinear degradation, deterministically, depends upon dispersion map and operating
channel power. We have tested our proposed technique in WDM transmission systems
using return-to-zero (RZ), carrier suppressed RZ (CSRZ) and differential phase-shift
keying modulation formats, and have analyzed the system performance by using
computer simulations. Our analysis shows that the proposed scheme can significantly
undo the degradation caused by fiber nonlinearity and can significantly increase the
overall system margin of a 40 Gb/s WDM system.
University of Minnesota M.S. thesis. January 2010. Major: Electrical and Computer Engineering. Advisor: M. Imran Hayee. 1 computer file (PDF); viii, 42 pages, appendix page 42.
Electronic post-compensation of optical fiber nonlinearity in high-speed long-haul wavelength division multiplexed transmission systems..
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