Mach-Zehnder modulator based on photonic crystal and nanowire waveguide

Abstract

The invention relates to a Mach-Zehnder modulator based on photonic crystal and nanowire waveguide. The modulator comprises a photonic crystal multiple-mode interference coupling partial wave module,a photonic crystal slab waveguide phase module and a photonic crystal multiple-mode interference coupling combined wave module, the photonic crystal multiple-mode interference coupling partial wave module and the photonic crystal slab waveguide phase module are in waveguide connection through a nanowire, and the photonic crystal multiple-mode interference coupling combined wave module and the photonic crystal slab waveguide phase module are in waveguide connection through a nanowire; the photonic crystal multiple-mode interference coupling partial wave module and the photonic crystal multiple-mode interference coupling combined wave module both comprise photonic crystal multiple-mode interference couplers, the photonic crystal slab waveguide phase module comprises photonic crystal slab waveguide, and multiple-mode interference coupled zones are arranged inside the photonic crystal multiple-mode interference couplers. The modulator has the advantages that transmission speed is quick, the modulation band is wide and high, the modulator size is small, high integration and interconnection can be easily achieved, and important practical value is achieved.

Description

technical field [0001] The invention relates to a modulator, in particular to a Mach-Zehnder type modulator based on photonic crystals and nanowire waveguides. Background technique [0002] With the advancement of science and technology and economic development, human beings have entered the information society. Optical information processing technology has the advantages of large transmission bandwidth and low loss. Become the new favorite to meet the development needs of modern communication technology. Among them, photonic integrated chips as integrated chips for information processing are the top priority of people's research. In order to achieve highly integrated interconnection, it is very important to reduce the size of photonic devices to the order of micro-nano. Therefore, people turned their perspective to photonic crystals. As a brand-new artificial microstructure material, it has many outstanding advantages, such as photonic band gap, slow light effect, photon...

AI Technical Summary

Problems solved by technology

However, most of the beam splitters and beam combiners use ordinary waveguides, such as Y-shaped waveguide structures. The disadvantages are that the size of the device will be large, and the modes at the junction of the waveguide and the photonic crystal slab waveguide will not match. caused serious loss

There are also photonic crystal Y-type and T-type line defect structures for beam splitting and combining, but the disadvantage is that the loss is high

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