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Optical Sensors 2011; and Photonic Crystal Fibers V

DOI: 10.1117/12.886942

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Optimization of an integrated wavelength monitor device

Journal article published in 2011 by Francesco Baldini, Pengfei Wang, Gilberto Brambilla ORCID, Yuliya Semenova ORCID, Jiri Homola, Qiang Wu, Gerald Farrell ORCID, Robert A. Lieberman, Kyriacos Kalli
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This paper is available in a repository.

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Abstract

In this paper an edge filter based on multimode interference in an integrated waveguide is optimized for a wavelength monitoring application. This can also be used as a demodulation element in a fibre Bragg grating sensing system. A global optimization algorithm is presented for the optimum design of the multimode interference device, including a range of parameters of the multimode waveguide, such as length, width and position of the input and output waveguides. The designed structure demonstrates the desired spectral response for wavelength measurements. Fabrication tolerance is also analysed numerically for this structure.