DIFFRACTION FROM AN ABRUPTLY TERMINATED DIELECTRIC SLAB WAVEGUIDE IN THE PRESENCE OF A CYLINDRICAL SCATTERER.

Uzunoglu Nikolaos, K; Capsalis Christos, N

dc.contributor.author	Uzunoglu Nikolaos, K	en
dc.contributor.author	Capsalis Christos, N	en
dc.date.accessioned	2014-03-01T01:06:34Z
dc.date.available	2014-03-01T01:06:34Z
dc.date.issued	1986	en
dc.identifier.issn	0733-8724	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9479
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0022700940&partnerID=40&md5=7b1b124b4c1ed1af89496735a4397db3	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Optics	en
dc.subject.other	LENSES	en
dc.subject.other	LIGHT - Diffraction	en
dc.subject.other	MATHEMATICAL TECHNIQUES - Integral Equations	en
dc.subject.other	GREEN'S FUNCTION	en
dc.subject.other	REFRACTIVE INDEX	en
dc.subject.other	WAVEGUIDES, OPTICAL	en
dc.title	DIFFRACTION FROM AN ABRUPTLY TERMINATED DIELECTRIC SLAB WAVEGUIDE IN THE PRESENCE OF A CYLINDRICAL SCATTERER.	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1986	en
heal.abstract	The efficiency of using an adaptor lens in front of an abruptly terminated symmetric slab optical waveguide is examined analytically. The adaptor lens is assumed to be of cylindrical shape with a constant refractive index. The coupling of the modes propagating inside the slab guide into radiation waves in the presence of the lens is treated by integral equation methods. In the first step an integral equation is derived for the Green's function G(r/r prime ) of an abruptly terminated slab waveguide. The Green's function is then used to formulate another integral equation for the unknown field inside the adaptor lens. The latter integral equation for the cylindrical lens cross section area is solved by adopting a cylindrical partial wave expansion for the unknown interior field. After determining this field, the reflection-coupling coefficients for the guided modes propagating in the opposite direction of the incident wave, are computed by using the Green's function G(r/r3 prime ). Radiation patterns are also derived in the far field region for an incident slab guided mode. Numerical results are computed and presented for several guide dimensions, lens radii, and refractive indices. 19 refs.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	Journal of Lightwave Technology	en
dc.identifier.isi	ISI:A1986A815500007	en
dc.identifier.volume	LT-4	en
dc.identifier.issue	4	en
dc.identifier.spage	405	en
dc.identifier.epage	414	en