WSEAS Transactions on Electronics
Print ISSN: 1109-9445, E-ISSN: 2415-1513
Volume 10, 2019
A New Design of a Modified Y-Branch Demultiplexer Based on Photonic Crystal Resonant Cavities and Directional Couplers
Authors: , ,
Abstract: In this paper a novel design of an optical modified Y-branch demultiplexer based on photonic crystal (PC) architecture is investigated. The designed structure is used to select four-channel around the central wavelength of 1550 nm. The presented device is formed by the combination of the directional couplers (DCs) and resonant cavities (RCs). The coupling region consists of three entire rows of decreased silicon (Si) rods. As fundamental structure a square lattice of Si rods is used. The performance of our demultiplexer has been analyzed and investigated using difference time domain (FDTD) method. The results show that the average transmission efficiency obtained is 99.829% and the channel spacing is approximately 2.13nm. The minimum and maximum crosstalk between channels is -55dB and -41 dB, respectively. Furthermore, the mean value of the quality factor is 9005.25. The compact size of our designed structure makes our proposed demultiplexer suitable for photonic integrated circuits (PIC).
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Keywords: Photonic crystal, filter, modified Y-branch demultiplexer, directional couplers , resonant cavities
Pages: 122-127
WSEAS Transactions on Electronics, ISSN / E-ISSN: 1109-9445 / 2415-1513, Volume 10, 2019, Art. #17