14 August 2003 Optogeometrical variations along the propagation axis in all fiber passive components
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Abstract
Optical components based on geometrical and refractive index variations could be studied by coupled mode theory. For that we introduce a new coupling coefficient which takes into account not only the geometrical variations, but also the core refractive index variations along the propagation axis for the coupled mode theory. The results show that the coupling coefficient between modes can be separated in a sum of two coefficients. The first one is the classic coefficient which takes into account the radius variation along axis. The second one is reported in order to study the index variation. We examine with more details the effect of the core dopants diffusion due to the heating during the fabrication process. The concatenation of a biconical tapers and long period grating is presented.
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Mickel Grisel, Olivier Latry, Eric Joubert, Guillaume Durcournau, "Optogeometrical variations along the propagation axis in all fiber passive components", Proc. SPIE 5246, Active and Passive Optical Components for WDM Communications III, (14 August 2003); doi: 10.1117/12.510666; https://doi.org/10.1117/12.510666
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