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Light-operated terahertz optical fiber modulator and light amplitude modulation method thereof

A terahertz and modulator technology, applied in the field of terahertz wave modulation, can solve the problems of high terahertz wave loss, low modulation depth, and low modulation speed, and achieve the effects of improving modulation efficiency, large modulation depth, and reducing loss

Active Publication Date: 2021-11-30
JINAN UNIVERSITY
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above prior art and provide an optically controlled terahertz optical fiber modulator and its optical amplitude modulation method to solve the problem of low modulation depth and low modulation speed of traditional optically controlled terahertz optical fiber modulators The problem of high loss of terahertz waves caused by free space modulation

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  • Light-operated terahertz optical fiber modulator and light amplitude modulation method thereof
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  • Light-operated terahertz optical fiber modulator and light amplitude modulation method thereof

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[0027] The present invention will be further described below in conjunction with drawings and embodiments.

[0028] see Figure 1-3 , Figure 4 of (a), Figure 4 of (b), Figure 5 , an optically controlled terahertz fiber modulator includes: a terahertz fiber 1 for transmitting terahertz waves, a polishing area is set on the side of the terahertz fiber 1, and the end face of the terahertz fiber 1 with the polishing area on the side is "D" type; a metamaterial 2 with a micro-nano structure is set on the polishing area, and graphene 3 is set on the metamaterial 2 to form a graphene-metamaterial structure as a light modulation structure, and the graphene 3 is a single layer or an N layer (few layers), N>1. The metamaterial 2 not only enhances the interaction between the external pump light 4 and the graphene 3, but also enhances the interaction between the terahertz wave and the graphene 3, thereby obtaining a large modulation depth. Polishing the flat area on the side can i...

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Abstract

The invention discloses a light-operated terahertz optical fiber modulator and a light amplitude modulation method thereof. The light-operated terahertz optical fiber modulator comprises a terahertz optical fiber used for transmitting terahertz waves, the side edge of the terahertz optical fiber is provided with a polishing and grinding area, and the end face of the terahertz optical fiber with the polishing and grinding area arranged on the side edge is D-shaped; and a metamaterial with a micro-nano structure is arranged on the polishing and grinding area, graphene is arranged on the metamaterial, and a graphene-metamaterial structure serving as a light modulation structure is formed. By adopting the side-polished terahertz optical fiber structure, the loss of terahertz waves in a free space can be effectively reduced, the contact area between graphene and a terahertz wave evanescent field is increased, and the modulation efficiency is improved. Graphene is adopted as a modulation medium substance, so that the modulation characteristic of the terahertz modulator can be effectively improved. In a terahertz wave band, the nano periodic structure prepared from the metamaterial has a high resonance factor. Resonance enhancement enables interaction between the metamaterial and terahertz light to be effectively enhanced.

Description

technical field [0001] The invention relates to the technical field of terahertz wave modulation, in particular to an optically controlled terahertz optical fiber modulator and an optical amplitude modulation method thereof. Background technique [0002] Terahertz wave refers to a section of electromagnetic wave with a frequency range between 0.1 and 10 THz, and its wavelength is in the range of 3mm to 30um. In the electromagnetic spectrum, terahertz waves lie between microwaves and far-infrared radiation. Since the microwave frequency is the upper limit of the electronic frequency, and the far-infrared radiation frequency is the lower limit of the optical frequency, it can also be said that the terahertz wave is located between the electronic and optical wavelength ranges. Terahertz science is an emerging interdisciplinary subject spanning macroscopic electronics and microphotonics, linking macroscopic classical electromagnetic wave theory and microscopic quantum theory. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01
CPCG02F1/0126G02F1/0118G02F2203/13Y02P70/50
Inventor 关贺元卢惠辉陈立均吴岱李鹏丘文涛陈哲王建新韩鑫洋明经渊梁爱杰
Owner JINAN UNIVERSITY
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