Improved design and analysis of 2D hexagonal photonic crystal structure based channel drop filter for optical communication system
Improved design and analysis of 2D hexagonal photonic crystal structure based channel drop filter for optical communication system
A improved design of channel drop filter is proposed based on two-dimensional (2D) hexagonal photonic crystal ring resonators. The transmission spectra of PCRR configuration has been investigated by using the Finite Difference Time Domain (FDTD) method in a Hexagonal lattice GaAs rods photonic crystal structure. The Photonic Bandgap (PBG) of the designed structure is calculated by Plane Wave Expansion (PWE) method. In this paper PhC design has been optimized for telecommunication wavelength 1511 nm. The number of rods in X and Z directions are 19 and 23, with lattice constant 0.540 nm and 0.1 μm rod radius. The designed structure is useful for CWDM optical communication systems and may serve as a key component in photonic integrated circuits. Scatterer rod radius analysis is also done in this paper to improve the dropping efficiency around 99%. The device is ultra compact with the overall size around 127 μm2.
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