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Modulator with multiple multilayer graphene output modes based on D-type dual-core optical fiber

A technology of multi-layer graphene and dual-core optical fiber, which is applied in the directions of instruments, optics, nonlinear optics, etc., can solve the problems of low compatibility, large size, narrow bandwidth, etc., and achieve convenient production, low insertion loss, and high extinction ratio Effect

Inactive Publication Date: 2018-10-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, optical devices generally have problems such as large size, narrow bandwidth, slow speed, and low compatibility. As an important device in optical communication systems, modulators urgently need to study modulators with high modulation rates and high extinction ratios.

Method used

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  • Modulator with multiple multilayer graphene output modes based on D-type dual-core optical fiber
  • Modulator with multiple multilayer graphene output modes based on D-type dual-core optical fiber
  • Modulator with multiple multilayer graphene output modes based on D-type dual-core optical fiber

Examples

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Embodiment 1

[0015] Example one, see figure 1 with figure 2 , A multi-output mode modulator based on D-type twin-core fiber with multilayer graphene. In this embodiment, the core 1 and core 2 have a radius of 1 μm, a core distance of 1 μm, and a cladding radius of 10 μm. The number of olefin layers is 2 layers.

[0016] Such as figure 1 As shown, for a dual-core fiber with two symmetric cores, the side close to core one (31) is ground to make a D-type dual-core fiber (4), and then graphene is deposited on D On the ground surface, deposit a substrate layer of hexagonal boron nitride (2) and a graphene layer (1) to produce a D-type dual-core fiber with two layers of graphene, and apply a metal electrode (5 ) (The metal electrode is Au or Pt). The light source is input from the core two (32) end, and a part of the light is coupled into the core one (31) by coupling with the core one (31), and the graphene layer interacts with the evanescent field leaked out of the core one, By controlling the...

Embodiment 2

[0017] Example two, see figure 1 with figure 2 , A multi-output modulator based on a D-type dual-core fiber with multilayer graphene. In this embodiment, the core 1 and core 2 radiuses are 10 μm, the core distance is 20 μm, and the cladding radius is 50 μm.

[0018] Such as figure 1 As shown, for a dual-core fiber with two symmetric cores, the side close to core one (31) is ground to make a D-type dual-core fiber (4), and then graphene is deposited on D On the ground surface, deposit a substrate layer of hexagonal boron nitride (2) and a graphene layer (1) to produce a D-type dual-core fiber with two layers of graphene, and apply a metal electrode (5 ) (The metal electrode is Au or Pt). The light source is input from the core two (32) end, and a part of the light is coupled into the core one (31) by coupling with the core one (31), and the graphene layer interacts with the evanescent field leaked out of the core one, By controlling the voltage applied to the graphene layer to c...

Embodiment 3

[0019] Example three, see image 3 with Figure 4 , A multi-output mode modulator based on D-type twin-core fiber with multilayer graphene. In this embodiment, the core 1 and core 2 radius are 100 μm, the core distance is 100 μm, the cladding radius is 100 μm, and the graphite The number of olefin layers is 4 layers.

[0020] Such as image 3 As shown, for a dual-core fiber with two symmetric cores, the side close to core one (31) is ground to make a D-type dual-core fiber (4), and then graphene is deposited on D On the polished surface, deposit a substrate layer of hexagonal boron nitride (2) and a graphene layer (1). In this way, a D-type dual-core fiber with four layers of graphene is produced, and metal is applied on the side Electrode (5) (The metal electrode is Au or Pt). The light source is input from the core two (32) end, and a part of the light is coupled into the core one (31) by coupling with the core one (31), and the graphene layer interacts with the evanescent fi...

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Abstract

Provided is a modulator with multiple multilayer graphene output modes based on a D-type dual-core optical fiber. The modulator is characterized in that an optical signal enters the D-type dual-core optical fiber (4) through a second fiber core (32), and due to a dual-core coupling function of the dual-core optical fiber, an optical coupling effect of the second fiber core partially acts on the interior of a first fiber core (31). Additionally, voltage is applied through a metal electrode (5), the effective refractive index of graphene layers (1) is changed by controlling the voltage, the coupling coefficients of the first fiber core and second fiber core of the D-type dual-core optical fiber are changed under the interaction between the graphene layers and an evanescent field of the firstfiber core, and the coupling length of the D-type dual-core optical fiber (4) is changed. According to the D-type dual-core optical fiber with fixed length, energy output by the first fiber core andthe second fiber core are both controlled by the voltage, and people can adopt light emitted by the first fiber core or the second fiber core as output light according to modulation demands or adopt the light output by the first fiber core and the second fiber core as two arms of the M-Z modulator by means of an M-Z mode in order to achieve phase modulation. Additionally, after utilization of thecharacteristic that the light absorption effect of graphene is stackable, the modulation effect can be changed by changing the number of the graphene layers.

Description

Technical field [0001] The present invention relates to the application of D-type dual-core fiber in modulators. In addition, by using the unique properties of metamaterial graphene, an all-fiber modulator with D-type dual-core fiber multilayer graphene multi-output mode that can be efficiently modulated is designed. It can be used for modulation, sensing and other optical communication processing in optical fiber communication systems. Background technique [0002] With the development of optical fiber communication, the performance of optoelectronic devices has also been given higher and higher requirements. Current optical devices generally have problems such as large size, narrow bandwidth, slow speed, and low compatibility. As an important device in optical communication systems, modulators are urgently needed to study modulators with high modulation rates and high extinction ratios. [0003] However, dual-core fibers are playing an increasingly important role in the research...

Claims

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Application Information

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IPC IPC(8): G02F1/00G02F1/01
CPCG02F1/0063G02F1/01G02F1/0115
Inventor 金丽丹宁提纲裴丽许建郑晶晶李晶
Owner BEIJING JIAOTONG UNIV
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