Equalizer Architectures for 40-Gb/s Optical Systems Limited by Polarization-Mode Dispersion

2006 ◽  
pp. 73-90 ◽  
Author(s):  
Jonathan Sewter ◽  
Anthony Chan Carusone
Keyword(s):  
Polarization Mode Dispersion ◽  
Optical Systems ◽  
Polarization Mode ◽  
Mode Dispersion

Equalizer Architectures for 40-Gb/s Optical Systems Limited by Polarization-Mode Dispersion

2005 ◽  
Vol 15 (03) ◽  
pp. 549-566
Author(s):  
Jonathan Sewter ◽  
Anthony Chan Carusone
Keyword(s):  
Polarization Mode Dispersion ◽  
Decision Feedback ◽  
Optical Systems ◽  
Limiting Factor ◽  
Decision Feedback Equalizer ◽  
Polarization Mode ◽  
First Order ◽  
Mode Dispersion ◽  
Linear And Nonlinear ◽  
Feedforward Equalizer

An analysis of first-order polarization-mode dispersion (PMD) effects in a 40-Gb/s optical system is used to compare different electronic equalizer architectures as potential PMD compensators. Both linear and nonlinear equalizers are considered employing symbol-spaced and fractionally-spaced taps. It is found that a decision feedback equalizer consisting of a 3-tap symbol-spaced feedforward equalizer and a 1-tap feedback equalizer effectively eliminates PMD as the dominant length-limiting factor in most 40-Gb/s optical systems. Such an equalizer would entail less complexity than several previously reported electronic PMD compensators.

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