An absorbing optical modulator based on graphene coplanar traveling wave electrodes

Abstract

Belonging to the field of optoelectronic technology, a graphene-based coplanar traveling-wave electrode absorption type optical modulator is disclosed, including a substrate layer, a strip optical waveguide, a dielectric filling layer, a dielectric isolation layer, graphene striplines and electrodes, the A first dielectric isolation layer, a first graphene stripline, and a second dielectric isolation layer are sequentially arranged above the strip optical waveguide, and a second graphene stripline and a third graphene isolation layer are arranged on the second dielectric isolation layer. Stripline, the two ends of the first graphene stripline are respectively connected to the first electrode and the second electrode, one end of the second graphene stripline is connected to the first ground electrode and the second ground electrode, and the third One end of the graphene strip line is connected to the third ground electrode and the fourth ground electrode; this structure increases the bandwidth of the optical modulator, and at the same time, the optical modulator is compatible with the microwave probe, and the coplanar waveguide traveling wave electrode structure is adopted, and the preparation is relatively simple , to enhance the practicability of the device.

Description

technical field [0001] The invention relates to an optical modulator, in particular to an absorbing optical modulator based on a graphene coplanar traveling wave electrode, belonging to the technical field of optoelectronics. Background technique [0002] With the advent of the era of big data, data communication services are growing explosively, which makes people's demand for bandwidth higher and higher, which also determines the development of optical transmission systems in the direction of ultra-high speed, large capacity, and integration. Optical modulators and optical switches are the core devices in optical communication networks, and play an important role in the construction of optical communication networks. At present, optical modulators based on various mechanisms have been developed and prepared successively, and the current commercialized modulators are mainly based on lithium niobate materials and InP-based optical modulators. In recent years, Si-based optic...

AI Technical Summary

Problems solved by technology

[0006] Based on the above technical problems, the present invention provides a graphene-based coplanar traveling-wave electrode absorption optical modulator, which solves the problem that existing graphene-based optical modulators are limited by the large RC constant of the lumped electrode structure, which causes modulation The problem of relatively small bandwidth is based on the large volume of traditional optoelectronic material modulators and the current problem of strict alignment between the upper and lower electrodes in the graphene microstrip line traveling wave electrode structure.

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