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Rate averaging in free space optics systems using incoherent sources

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dc.contributor.author Baykal, Yahya
dc.date.accessioned 2020-04-18T13:26:01Z
dc.date.available 2020-04-18T13:26:01Z
dc.date.issued 2004-06-23
dc.identifier.citation Baykal, Yahya, "Rate averaging in free space optics systems using incoherent sources" Eleventh International Symposium On Atmospheric And Ocean Optics /Atmospheric Physics, Vol.5743, pp.100-109, (2004). tr_TR
dc.identifier.isbn 0-8194-5717-5
dc.identifier.issn 0277-786X
dc.identifier.uri http://hdl.handle.net/20.500.12416/3324
dc.description.abstract Effect of the information rate on the scintillation index is examined for free space optical (FSO) broadband access applications that use spatially incoherent sources. For this purpose, intensity fluctuations are formulated indicating the effect of the rate on the scintillation index in the presence of the atmospheric turbulence. The bandwidth of modulation of the incoherent source is taken to be much smaller than the carrier frequency, i.e., narrowband approximation is employed. Rate averaging factor for spatially incoherent source is derived as to represent the averaging in weak atmospheric turbulence due to rate of modulation of the intensity. It is found that the scintillations decrease as the rate of transmission through atmospheric turbulence increases. This decrease is independent of the carrier wavelength of the FSO system but depends on the outer scale of turbulence. Up to 10 Gbps, the decrease is negligible for realistic outer scale values. When extremely large eddies are present in the formation of turbulence, rate can be effective in the reduction of the scintillations even at rates up to 10 Gbps. In the limit when the information rate is taken as zero, our results correctly reduce to the known scintillations for spatially incoherent monochromatic excitation. tr_TR
dc.language.iso eng tr_TR
dc.publisher Spie-Int Soc Optical Engineering tr_TR
dc.relation.isversionof 10.1117/12.606340 tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject Atmospheric Turbulence tr_TR
dc.subject Free Space Optics tr_TR
dc.subject Averaging tr_TR
dc.title Rate averaging in free space optics systems using incoherent sources tr_TR
dc.type workingPaper tr_TR
dc.relation.journal Eleventh International Symposium On Atmospheric And Ocean Optics /Atmospheric Physics tr_TR
dc.identifier.volume 5743 tr_TR
dc.identifier.startpage 100 tr_TR
dc.identifier.endpage 109 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Elektronik ve Haberleşme Mühendisliği Bölümü tr_TR


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