dc.contributor.author	Poirrier, Julien	en
dc.contributor.committeechair	Stolen, Roger Hall	en
dc.contributor.committeemember	Boyle, Robert J.	en
dc.contributor.committeemember	Jacobs, Ira	en
dc.contributor.department	Electrical and Computer Engineering	en
dc.date.accessioned	2014-03-14T20:43:15Z	en
dc.date.adate	2000-08-23	en
dc.date.available	2014-03-14T20:43:15Z	en
dc.date.issued	2000-07-25	en
dc.date.rdate	2001-08-23	en
dc.date.sdate	2000-08-11	en
dc.description.abstract	Polarization Mode Dispersion induces polarization dependent propagation. Consequently it generates a multiple imaging of the light pulse carrying the information. Its first order appears as a dual path fading channel of Maxwellian statistics. It results in harmful impairments that prevent the upgrade and installation of high bit-rate systems. The random process PMD exhibits a strong frequency dependence, so that its amelioration requires channel by channel, non-linear, adaptive mitigation. Electronic mitigation appears as a very attractive solution to overcome the limit set by the PMD. Consequently, we considered the implementation of these solutions at the receiver in the electrical domain. We verified that these linear and non-linear equalization techniques can greatly reduce the power penalty due to PMD. Equalization's performance depends highly on the type of systems considered. For the two main types of systems: thermal noise limited systems and systems exhibiting ASE (systems using optical amplifiers), we demonstrated and quantified the induced improvement (measured as power penalty reduction). The most sophisticated technique that we considered (NLC+FDE) handles any kind of first order PMD within a 4 dB margin in the thermal noise limit. This extended to a 11 dB margin in the presence of ASE. This comes from the limitation set by the signal dependence of the noise. In fact, these DSP techniques do a better job at reducing very high penalty. Consequently, for a power and ISI limited link, it may be required to associate to electronic solutions optical compensation in order to reach acceptable performance. On the other hand, for links having large power margin or exhibiting reasonable PMD, electronic techniques appear as an easy, inexpensive and convenient solution. We derived in this work the bounds to NLC performance in the presence of ASE. Therefore, we extended the usual results of the thermal noise limit to the particular case of signal dependent noise. We also made clear that optical systems, because of their noise specificities can not be studied or designed as others links. Notions such as eye opening, SNR and ISI need to be carefully defined and adapted to this case. We have provided in this work PMD dependent power penalty map for known systems. Given the link's statistics and characteristics, one can determine, following our structure, which mitigation techniques allow upgrade.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-08112000-13390038	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-08112000-13390038/	en
dc.identifier.uri	http://hdl.handle.net/10919/34469	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	1_intro.pdf	en
dc.relation.haspart	3_Mitigation.pdf	en
dc.relation.haspart	5_vita.pdf	en
dc.relation.haspart	0_cover.pdf	en
dc.relation.haspart	2_PMD.pdf	en
dc.relation.haspart	4_CCL.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	Fiber Optic Communication	en
dc.subject	Digital Communications	en
dc.title	Electronic Mitigation of Polarization Mode Dispersion	en
dc.type	Thesis	en
thesis.degree.discipline	Electrical and Computer Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Electronic Mitigation of Polarization Mode Dispersion

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