Slot-slot waveguide with negative large and flat dispersion covering C+L+U waveband for on-chip photonic networks

A novel, to the best of our knowledge, dual-core slot-slot waveguide with extreme high dispersion is proposed. The high dispersion value at the desired wavelength is obtained based on strong resonance coupling between two slot-waveguide modes. The properties of dispersion magnitude and bandwidth are...

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Bibliographic Details
Published in:Applied optics (2004) 2019-07, Vol.58 (21), p.5728
Main Authors: Hui, Zhanqiang, Yang, Min, Pan, Deng, Zhang, Tiantian, Gong, Jiamin, Zhang, Meizhi, Zeng, Xiangmei
Format: Article
Language:English
Subjects:
Bandwidths
Computer simulation
Finite difference time domain method
Integrated circuits
Multiplexing
On-Off Keying
Optical communication
Optical fibers
Perfectly matched layers
Photonics
Time domain analysis
Waveguides
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Summary:A novel, to the best of our knowledge, dual-core slot-slot waveguide with extreme high dispersion is proposed. The high dispersion value at the desired wavelength is obtained based on strong resonance coupling between two slot-waveguide modes. The properties of dispersion magnitude and bandwidth are numerically analyzed by using the finite-difference time-domain method with a perfectly matched layer boundary. All numerical simulation results reveal that for the optimized geometrical parameters of H =350  nm, L =569  nm, S =31.3  nm, L =1062.39  nm, H =427  nm, L =137.4  nm, and S =63.5  nm, the maximum dispersion of negative 3.645×10   ps·nm ·km and dispersion full width at half-maximum of 6.3 nm at 1550 nm have been obtained. By cascading the slot-slot waveguides with varying width and height, a large and flattened dispersion of -3.5×10   ps·nm ·km covering the C+L+U waveband is obtained. Dispersion compensation of a 100 Gbit/s return-to-zero on-off-keying optical time-division multiplexing signal after 50 km full spectrum single-mode optical fiber transmission with five different central wavelengths is demonstrated through simulation for the first time. In addition, fabrication tolerance of the proposed slot-slot waveguide is analyzed. Such a waveguide is compatible with complementary metal-oxide-semiconductor technology and has potential applications in next-generation large-scale photonic integrated circuits.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.58.005728