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Optical waveguide splitters based on multimode interference structures made by ion exchange in glass.

100%

Blahut M.

Optica Applicata

2000

tom Vol. 30, nr 2-3

401-413

In the paper, numerical studies of gradient index optical splitters made using a multimode interference technology are presented. Multimode interference structures produced in K/sup +/ to or from Na/sup +/ and Ag/sup +/ to or from Na/sup +/ ion exchange processes have been compared. The influence of geometrical parameters of multimode interference structure and technological process parameters is examined in numerical simulations. Based on the above, gradient index optical waveguide splitters and Mach-Zehnder interferometers in multimode interference configuration are proposed.

Polarization effects in K+–Na+ ion exchanged MMI structures with absorption cover

63%

Szewczuk A. , Blahut M.

Optica Applicata

2013

tom Vol. 43, nr 3

441--452

The paper concerns the polarization effects in gradient index MMI sensor structures made by ion K+–Na+ exchange. It has been shown both experimentally and based on the numerical calculation that for the K+–Na+ ion exchanged MMI structures, propagation conditions of light in multimode section vary considerably for each polarization. There are presented the possibilities of using this effect in application to gas sensing. Analyzed sensor structures are covered by WO3 absorbing nanolayers. Numerical analyses of MMI sensor are performed and modal attenuation coefficients are determined. The comparison between operation characteristics obtained for the TE and TM polarization is presented.