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Method for depositing photoinduced graphene onto fiber end surfaces

A fiber end face and graphene technology, which is applied in the field of light-induced graphene deposition onto the fiber end face, can solve the problems affecting graphene performance, complex process, complex solution, etc., and achieve the effect of small quantity, simple process and short time consumption

Inactive Publication Date: 2010-06-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method needs to be made into a film first, the process is more complicated, and the presence of polyvinyl alcohol will affect the performance of graphene as a saturable absorber
[0008] In short, it can be seen from the above description that the existing solutions for transferring graphene onto optical fiber substrates are relatively complicated, and a problem that urgently needs to be solved by those skilled in the art is how to creatively propose a simple process

Method used

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  • Method for depositing photoinduced graphene onto fiber end surfaces
  • Method for depositing photoinduced graphene onto fiber end surfaces
  • Method for depositing photoinduced graphene onto fiber end surfaces

Examples

Experimental program
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Embodiment 1

[0053] refer to figure 1 - Figure 2, detailing a specific implementation example of the present invention. In this implementation example, the goal is to deposit graphene annularly on the core region and a part of the periphery of the core region on the end face of a standard single-mode optical fiber.

[0054] (1) The graphene solution 4 is prepared, the solvent is N-methylpyrrolidone, and the solution concentration is 0.04 mg / ml.

[0055] (2) Refer to figure 1 , Light source 1 is a 980nm continuous laser with pigtail output. Fiber 3 is a standard single-mode fiber with a cladding diameter of 125 μm and a core diameter of 9 μm. The end of the fiber to be deposited is cut so that it is perpendicular to the fiber axis. The micrograph of the fiber end face is shown in Figure 2(a). A standard fiber optic adapter 2 is used to connect the output pigtail of the light source 1 to the other end of the fiber 3 . The output laser power of light source 1 is 70mW.

[0056] (3) The en...

Embodiment 2

[0058] The operation steps in this implementation example are completely the same as those in implementation example 1, and will not be repeated here. The difference is that in this embodiment: the output laser power of the light source 1 is 100 mW, and the laser action time is 20 min.

[0059] Fig. 3(a) is a micrograph of the end face of the optical fiber after the graphene is deposited by the light-induced method at this time. Figure 3(b) is a micrograph when observing the Raman spectrum of the fiber end face, the cross point corresponds to the sampling point when observing the Raman spectrum, and the scale unit is μm.

[0060] From the comparison of Figure 2(b) and Figure 3(a), it can be seen that compared with Example 1, under the laser power and action time of Example 2, the deposition morphology of graphene on the fiber end face is similar, but the deposition range is changed. Big.

Embodiment 3

[0062] The operation steps in this implementation example are completely the same as those in implementation example 1, and will not be repeated here. The difference is that in this embodiment: the output laser power of the light source 1 is 500 mW, and the laser action time is 20 min.

[0063] Fig. 4(a) is a micrograph of the end face of the optical fiber after the graphene is deposited by the light-induced method at this time. Figure 4(b) is a micrograph when observing the Raman spectrum of the fiber end face, the cross point corresponds to the sampling point when observing the Raman spectrum, and the scale unit is μm.

[0064] From the comparison of Figure 3(a) and Figure 4(a), it can be seen that compared with Example 2, under the laser power and action time of Example 3, the deposition range of graphene on the fiber end face becomes significantly larger, and the deposition shape The circular feature of the appearance is not obvious. Since Figure 3(a) and Figure 4(a) wer...

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Abstract

The invention discloses a method for depositing photoinduced graphene onto fiber end surfaces, which is a method for transferring grapheme to fiber substrates. The method is characterized by comprising: preparing grapheme solution; immersing the to-be-deposited end of fiber in the grapheme solution; allowing output light of a light source to be coupled and enter from the other end of the fiber; and controlling the deposition morphology and thickness of the grapheme on the end surface of the fiber by controlling the output power and action time of the light source. The method has the advantages of simple process, short consumed time, small amount of needed grapheme and low cost.

Description

technical field [0001] The invention relates to a method for transferring graphene onto an optical fiber substrate, in particular to a method for light-induced graphene deposition onto an optical fiber end face. Background technique [0002] Since the stable existence of graphene was confirmed experimentally in 2004, its good thermal and mechanical properties, especially its excellent electrical properties, have attracted widespread attention from researchers at home and abroad. The unique structure of graphene is also destined to have some special photoelectric properties. In 2009, some scholars experimentally confirmed that graphene can be used as an excellent saturable absorber in mode-locked fiber lasers. At the same time, graphene also has unique nonlinear and dispersion properties, and has broad application prospects in nonlinear optics, nanophotonics and other fields. [0003] At present, there are several methods to transfer graphene to the fiber substrate to make ...

Claims

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Application Information

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IPC IPC(8): C03C25/16C03C25/44
Inventor 杨昌喜桂丽丽
Owner TSINGHUA UNIV
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