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D-type optical fiber based graphene electro-optical modulator and preparation method thereof

An electro-optic modulator and graphene technology, which is applied in the directions of instruments, optics, nonlinear optics, etc., can solve the problems of large coupling loss, difficult coupling between waveguide and optical fiber, etc., and achieve low insertion loss, avoid coupling problems, and simple preparation process Effect

Inactive Publication Date: 2012-07-04
泰州巨纳新能源有限公司
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AI Technical Summary

Problems solved by technology

Due to the special waveguide structure of the graphene waveguide modulator, most of the light energy propagates on the surface of the waveguide, so there are great difficulties in the coupling between the waveguide and the optical fiber, and the coupling loss will be very large
In addition, waveguide and fiber coupling need to be packaged, and the cost of waveguide packaging often occupies a large part of the overall device cost

Method used

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  • D-type optical fiber based graphene electro-optical modulator and preparation method thereof
  • D-type optical fiber based graphene electro-optical modulator and preparation method thereof
  • D-type optical fiber based graphene electro-optical modulator and preparation method thereof

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preparation example Construction

[0038] according to figure 1 , figure 2 , image 3 Shown, a kind of graphene electro-optic modulator based on D-type optical fiber, its preparation method has the following steps:

[0039] a. Preparation of D-type optical fiber:

[0040] First, use optical fiber strippers to remove the coating layer in the middle of a section of single-mode optical fiber 1 with a length of about 2 cm, and then use chemical corrosion to select a length of 1 cm in the middle of the single-mode optical fiber 1 that has been decoated, remove the cladding, and expose the core. outer;

[0041] b. Preparation of graphene film:

[0042] 1cm×1cm high-quality graphene 4 is prepared by chemical vapor deposition, and the growth substrate of graphene 4 is removed by chemical etching, so that graphene 4 floats on the surface of the solution;

[0043] c, the graphene film is transferred to the surface of the D-type optical fiber:

[0044] Use D-type optical fiber 2 as a new graphene 4 substrate, and t...

specific Embodiment approach

[0054] The specific implementation method is as follows: firstly, a section (about 1 cm long) of an ordinary single-mode optical fiber 1 is selected to remove the coating layer and the cladding, and a D-type optical fiber 2 is manufactured. Then the prepared graphene 4 film is transferred to the D-type optical fiber 2, so that the graphene 4 film completely covers the core of the D-type optical fiber 2. Therefore, the evanescent field of light leaked from the fiber core interacts with graphene 4, and the longer the graphene 4 is, the longer the interaction length between the light field and graphene 4 is, and the greater the absorption of the light field by graphene 4 is. Prepare a metal electrode 5 and a lead wire at one end of the graphene 4, and then coat a layer of Al on the graphene 4 film next to the metal electrode 3. 2 o 3 The insulating layer 5 is directly above the insulating layer 5, and the metal electrode 3 is plated and leads are added. Finally, the packaging te...

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Abstract

The invention relates to a D-type optical fiber based graphene electro-optical modulator which is characterized in that one section of an optical fiber (1) is prepared into a D-type groove, graphene (4) is laid on the surface of a D-type optical fiber (2), one end of the graphene (4) is provided with a metal electrode and lead (3), and a film of the graphene (4) is plated with an insulating layer (5); the insulating layer (5) is an Al2O3 insulating layer or an insulating layer with a high dielectric constant, and the insulating layer (5) is plated beside a metal electrode and lead (6) on the film of the graphene (4); and the metal electrode-lead (6) is a conductive electrode, and the conductive electrode is made of Au or Pt. According to the invention, electrical signals are applied to the two electrode and leads so as to generate an electric field perpendicular to the film of the graphene (4), thereby changing the Fermi level of the graphene (4), and further realizing the electro-optical modulating function of the graphene (4) through changing the optical signal absorption strength of the graphene (4).

Description

[0001] Field [0002] The invention relates to a graphene electro-optic modulator, in particular to a preparation method of a graphene electro-optic modulator based on a D-type optical fiber, belonging to the field of optoelectronic devices. Background technique [0003] Currently, electro-optic modulators are used to switch light beams, convert electrical signals into optical signals to transmit digital information, and are mostly used for Internet connections. Graphene is a two-dimensional crystal composed of carbon atoms, and some people use "single-layer graphite" as its name. In graphene, carbon atoms are represented by sp 2 Hybridized and arranged into a honeycomb hexagonal planar structure. Graphene is also the basic building block of other carbon material allotropes. Graphene was first discovered by scientists from the University of Manchester in 2004, and the discoverer of graphene won the Nobel Prize in Physics in 2010. Room temperature mobility of carriers in g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/035
Inventor 丁荣义理林倪振华
Owner 泰州巨纳新能源有限公司
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