Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/2727
Title: Transmission enhanced wavelength demultiplexer design based on photonic crystal waveguide with gradually varied width
Authors: Neşeli, Berkay
Bor, Emre
Kurt, Hamza
Turduev, Mirbek
Keywords: Optical waveguides
photonic crystals
wavelength division multiplexing
finite difference methods
slow light
optimization
chirp
Issue Date: 2019
Publisher: IEEE Computer Society
Source: Neseli, B., Bor, E., Kurt, H., and Turduev, M. (2019, July). Transmission Enhanced Wavelength Demultiplexer Design Based on Photonic Crystal Waveguide with Gradually Varied Width. In 2019 21st International Conference on Transparent Optical Networks (ICTON) (pp. 1-4). IEEE.
Series/Report no.: International Conference on Transparent Optical Networks
Abstract: In this study, we propose the design of photonic crystals with linearly tapered waveguide such that waveguide width is gradually varied. Four drop-channels are included to implement wavelength demultiplexing applications. Here, a tapering of the waveguide has been chosen to localize propagating light within the desired positions. Afterwards, the corresponding drop-channels have been opened to confine the light with the targeted wavelengths. The designed structure consists of cylindrical alumina (Al2O3) dielectric rods and operates at microwave frequencies between 13.2 GHz and 15.3 GHz. An optimization algorithm is applied to enhance transmission efficiencies of the drop-channels and to minimize possible cross-talks between the channels by optimally modulating the position of the dielectric rods inside the channels which form cavity-coupling regions. The optimization algorithm is incorporated with the finite-difference time-domain method to evaluate the transmission efficiencies of the drop-channels for the instant designed structure. The physical mechanism of wavelength demultiplexing is related to slowing down and trapping of light in the tapered waveguide and its coupling to drop-channels for selected microwave wavelengths at different positions. Moreover, an experimental verification of the numerical analyses is demonstrated in the microwave regime and corresponding results will be shared in the conference. © 2019 IEEE.
URI: https://ieeexplore.ieee.org/document/8840385
https://hdl.handle.net/20.500.11851/2727
ISBN: 978-172812779-8
ISSN: 21627339
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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