Broadband variable chromatic dispersion in C-band frequency range is demonstrated using novel nanostructured electro-optic waveguide consisting of low-loss Si3N4 rectangular core and Si/SiO2 two-dimensional photonic-crystal layer controlled by voltage bias.1. Introduction Technology for chromatic dispersion compensation is widely interested in high-speed optical-fiber communications, since chromatic dispersion plays a significant role in the propagation of short optical pulses in optical fibers [1]. Chromatic dispersion compensators have been developed using optical components such as fiber Bragg gratings, optical filters, and dispersive optics [2][3][4]. These compensators are designed and utilized as discrete modules installed in line in the optical fiber communication systems. With the advent of the dense wavelength-division multiplexing, increase in the number of modules becomes an issue in system construction, and there is growing demand for compact and integrated devices, which allow smaller unit sizes, lower power consumption and lower costs.In this paper, we study the voltage dependence of chromatic dispersion in C-band frequency range using photonic-band electro-optic waveguide as potential compact chromatic dispersion compensator. We present the first demonstration of electro-optic control of chromatic dispersion in Si-based photonic-band structure.
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