I-shaped microstructure optical fiber electro-optical modulator based on two-dimensional material coating

Abstract

The invention discloses an I-shaped microstructure optical fiber electro-optical modulator based on two-dimensional material coating. The invention belongs to the field of optical fiber devices for communication, and particularly relates to the field of optical modulation. A schematic diagram of the modulator is as shown in an abstract drawing, a common single-mode fiber cladding 3 is cut and ground to form an I-shaped structure, and the upper layer and the lower layer are respectively processed to have the same distance from a fiber core 4, so that main parts of a light field are transmitted in the fiber core; the two-dimensional material films 5 are respectively inscribed on the upper surface of the silicon substrate 1 and the upper side of the I-shaped optical fiber, and then the I-shaped optical fiber is reversely piled on the substrate; the electrodes 2 are arranged on the two sides of the silicon support 6 in a transition mode so as to provide voltage needed by modulation. Through the setting, different voltages are applied to the modulator, and the light intensity change after passing through the modulator is observed, so that parameters such as modulation depth, modulation voltage, insertion loss and the like are obtained. According to the electro-optical modulator, the insertion loss is effectively reduced through the I-shaped structure, the modulation efficiency can be improved through double-layer coating of the two-dimensional material, and the modulation voltage is reduced.

Description

technical field [0001] The invention belongs to the field of optical fiber devices for communication, in particular to the field of light modulation. Background technique [0002] In the information society, the increasing development of data communication and the Internet has prompted the market to continuously increase the demand for transmission rate and communication capacity, so that the demand for optical transmission networks has also increased rapidly. In large-capacity optical transmission systems, high-speed modulation of optical signals must be indispensable. Optical fiber communication is the cornerstone of the information industry, a research field highlighted in the "National Medium and Long-Term Development Plan", and a major issue related to the national economy, people's livelihood and national strength. Optical communication technology has made great progress in recent decades and is closely related to our lives. The design of optical devices in optical c...

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Problems solved by technology

However, the above-mentioned D-type optical fiber greatly destroys the original structure of the optical fiber, and the cutting surface involves the core, resulting in a huge loss, which cannot meet the needs of practical applications (about ≤1dB)

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