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Demultiplexers for DWDM applications using one-dimensional planar binary photonic crystals defected with ZnSxSe1-x ternary alloys

Demultiplexers for DWDM applications using one-dimensional planar binary photonic crystals... Abstract.We propose a structure comprising a defective one-dimensional planar binary photonic crystal (PC) to realize a demultiplexing operation for dense wavelength division multiplexer (DWDM) transmission systems. The unit cell of the crystal consists of ZnSe and ZnS thin films, and the defective layer is ZnSxSe1  −  x, (0  ≤  x  ≤  1). Transmittance for the structure was numerically investigated using the transfer matrix method. The selecting mechanism of the output wavelength was based on selecting the appropriate sulfur concentration (x value) in the defective layer of the PC. We used six different sulfur concentrations to demultiplex six different output channels. The line width of the output channels was about 0.13 nm with a quality factor of 12,199. The average crosstalk between the adjacent transmitted channels was about −22.16  dB. The overall dimension of the proposed demultiplexer was about 108.4  μm, which practically makes the demultiplexer easily integrated into photonic circuits. Our results show that the proposed structure has all of the required characteristics to demultiplex the C-band signals with a 0.16 nm separation, which corresponds to the ITU grid for DWDM. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Nanophotonics SPIE

Demultiplexers for DWDM applications using one-dimensional planar binary photonic crystals defected with ZnSxSe1-x ternary alloys

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References (78)

Publisher
SPIE
Copyright
© 2022 Society of Photo-Optical Instrumentation Engineers (SPIE)
ISSN
1934-2608
eISSN
1934-2608
DOI
10.1117/1.jnp.16.016006
Publisher site
See Article on Publisher Site

Abstract

Abstract.We propose a structure comprising a defective one-dimensional planar binary photonic crystal (PC) to realize a demultiplexing operation for dense wavelength division multiplexer (DWDM) transmission systems. The unit cell of the crystal consists of ZnSe and ZnS thin films, and the defective layer is ZnSxSe1  −  x, (0  ≤  x  ≤  1). Transmittance for the structure was numerically investigated using the transfer matrix method. The selecting mechanism of the output wavelength was based on selecting the appropriate sulfur concentration (x value) in the defective layer of the PC. We used six different sulfur concentrations to demultiplex six different output channels. The line width of the output channels was about 0.13 nm with a quality factor of 12,199. The average crosstalk between the adjacent transmitted channels was about −22.16  dB. The overall dimension of the proposed demultiplexer was about 108.4  μm, which practically makes the demultiplexer easily integrated into photonic circuits. Our results show that the proposed structure has all of the required characteristics to demultiplex the C-band signals with a 0.16 nm separation, which corresponds to the ITU grid for DWDM.

Journal

Journal of NanophotonicsSPIE

Published: Jan 1, 2022

Keywords: demultiplexer; photonic crystal; quality factor; crosstalk; ternary alloys

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