The extinction ratio in optical two-guide-coupler Delta beta switches with asymmetric detuning

Two-guide asymmetrically detuned Delta beta optical coupler switches with two equal-length sections that operate as on-off switches are examined by means of the exact eigenmodes of a slab waveguide model of the coupler. Two input/output configurations are analyzed, namely (1) where a single output g...

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Bibliographic Details
Published inIEEE journal of quantum electronics Vol. 26; no. 4; pp. 685 - 691
Main Authors Donnelly, J.P., Molter, L.A., Hopcraft, G.S., Smith, R.E., Haus, H.A.
Format Journal Article
LanguageEnglish
Published IEEE 01.04.1990
Subjects
Extinction ratio
Optical coupling
Optical switches
Optical waveguides
Power generation
Shape
Slabs
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Summary:Two-guide asymmetrically detuned Delta beta optical coupler switches with two equal-length sections that operate as on-off switches are examined by means of the exact eigenmodes of a slab waveguide model of the coupler. Two input/output configurations are analyzed, namely (1) where a single output guide is connected to the same guide of the coupler as the input guide, and (2) where a single output guide is connected to the coupled guide. For both cases, ideal switching, i.e. complete extinction in the off state, can be obtained in the two-section Delta beta coupler over a wide range of coupler lengths. The results differ from those of conventional coupled-mode theory in that when the two sections of the coupler are antisymmetrically detuned, i.e. delta = delta /sub 1/=- delta /sub 2/, complete extinction can be obtained only in a few special cases.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9197
1558-1713
DOI:10.1109/3.53385