Analysis and modeling of the effects of reflection induced noise on the performance of fiber optic communication systems

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dc.contributor.authorRaman, Ashok S.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:31:06Zen
dc.date.adate2009-03-12en
dc.date.available2014-03-14T21:31:06Zen
dc.date.issued1990en
dc.date.rdate2009-03-12en
dc.date.sdate2009-03-12en
dc.description.abstractRefractive index discontinuities in fiber optic transmission systems are known to cause deleterious effects. Non-negligible return losses associated with connectors and splices in present day systems cause intermittent error bursts and bit-error-rate floors in gigabit per second systems. These are attributed to the interferometric conversion of laser phase noise into signal-dependent intensity noise. This relative intensity noise (RIN) is substantially higher than the intrinsic RIN of the laser. The power spectral density of the RIN and its impact on the performance of incoherent on-off keying digital systems are calculated. The combined effects of this noise and other degradations present in the system are studied using a simple model. It is shown that even though RIN is a bounded degradation, it, particularly in conjunction with other impairments, results in high and sometimes unacceptable power penalties. Previous analyses are extended to include the effects of multiple reflections from a single pair of reflectors, the effects of a multiplicity of reflection points and the combined effects of reflection-induced noise and other impairments. It is shown that the effect of multiple reflections, although having only a small influence on the reflection induced noise power, changes the distribution of the noise and has more serious system effects. In the case of a multiplicity of reflection points it is shown that for as few as four reflection points, the Gaussian approximation gives results in good agreement with results calculated from a Gram-Charlier series approximation to the actual distribution function. Power penalties as a function of reflection coefficient are calculated and compared using several different approximations for the distribution of the interferometric noise. The methodology presented, although applied specifically to reflection induced noise, is applicable to a broader class of problems in which there are other signal dependent noise phenomena.en
dc.description.degreeMaster of Scienceen
dc.format.extentvii, 101 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03122009-040537en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03122009-040537/en
dc.identifier.urihttp://hdl.handle.net/10919/41455en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.R353.pdfen
dc.relation.isformatofOCLC# 23657973en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.R353en
dc.subject.lcshFiber optics -- Researchen
dc.subject.lcshNoise -- Measurementen
dc.titleAnalysis and modeling of the effects of reflection induced noise on the performance of fiber optic communication systemsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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