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IJSTR >> Volume 3- Issue 7, July 2014 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Multimode Interference Biosensor Working With Multiple Wavelengths And Two Polarizations

[Full Text]



Moisi Xhoxhi, Partizan Malkaj, Tatjana Mulaj, Alma Dudia, Aurel Ymeti



Index Terms: biosensor, integrated optics, MMI structures, waveguides, multichannel interferometer, multiple wavelength, two polarizations, virus detection



Abstract: In this paper is presented a new design for Young Interferometer (YI) biosensor and the analysis of output power of a MMI waveguide that will be used in it. The waveguides are simulated with OptiBPM software, which is a Waveguide Optics Modeling software from Optiwave Coorporation. Output power and excess loss is analysed for 15 and 110 planar MMI waveguides for different wavelengths with TE and TM polarization. It is demonstrated that output power decreases exponentially with the increase of the wavelength for both polarizations. The evaluation of the excess loss shows that it is higher for a TM polarized field for all the wavelengths and periodicities considered. Power imbalance seems to have small values suggesting the use of MMI waveguides as good power splitters. A comparison of the excess loss between 15 and 110 MMI waveguides shows that it remains almost the same for both polarizations for the optimum wavelength ( = 647 nm).



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