Structures in optical devices having graphene and manufacturing method for the same

Patent metadata

Field	Value
Publication number	US-11567258-B1
Application number	US-202217665940-A
Country	US
Kind code	B1
Filing date	Feb 7, 2022
Priority date	Jul 7, 2021
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

The present disclosure discloses an optical device structure including an optical fiber including a core part, a clad part, and a three-dimensional micro hole structure in the clad part, wherein a surface of the three-dimensional micro hole structure is provided with at least a non-flat surface, and a conformal graphene layer is formed on the surface of the three-dimensional micro hole structure, and a method of manufacturing the same.

First claim

What is claimed is:

1. An optical device structure, comprising:
an optical fiber including a core part, a clad part, and a three-dimensional micro hole structure in the clad part,
wherein a surface of the three-dimensional micro hole structure is provided with at least a non-flat surface,
a conformal graphene layer is formed on the surface of the three-dimensional micro hole structure, and
the conformal graphene layer is formed through nucleation and growth on a target base material surface by diffusion of carbon atoms generated through decomposition of a carbon precursor by a catalytic action on a non-metal layer.

2. The optical device structure of claim 1 , wherein a shape of the three-dimensional micro hole structure, a distance between the three-dimensional micro hole structure and the core part, and/or the surface on which the conformal graphene layer is formed are controlled to optimize a nonlinear interaction between a laser which proceeds along the core part of the optical fiber and the conformal graphene layer coated on the surface of the three-dimensional micro hole structure.

3. The optical device structure of claim 1 , wherein:
the three-dimensional micro hole structure includes a first hole formed in a surface of the optical fiber and a second hole connected to the first hole and adjacent to the core part; and
the second hole occupies a smaller region than the first hole.

4. The optical device structure of claim 1 , wherein the three-dimensional micro hole structure is additionally provided with an optical component therein.

5. The optical device structure of claim 1 , wherein the three-dimensional micro hole structure is composed of a plurality of small holes, and the graphene layer is provided on surfaces of the plurality of small holes and thus a grating device is implemented.

6. The optical device structure of claim 1 , wherein the conformal graphene layer functions as a saturable absorber.

7. The optical device structure of claim 1 , wherein the optical device structure functions as a mode locker configured to fix phases of laser modes progressing in a laser resonator, and generates a pulse in femtosecond (10 −15 second) units.

8. A method of manufacturing an optical device structure, comprising
disposing an optical fiber including a core part, a clad part, and a three-dimensional micro hole structure in the clad part;
forming a graphene layer on a surface of the three-dimensional micro hole structure, which is an operation of forming a non-metal layer on a dummy substrate;
disposing the optical fiber so that the non-metal layer on the dummy substrate faces the three-dimensional micro hole structure; and
synthesizing a graphene film by injecting a carbon precursor to form graphene on the surface of the three-dimensional micro hole structure,
wherein nucleation and growth of the graphene is performed on a surface of an application target of the graphene through decomposition of the carbon precursor,
the carbon precursor is supplied with energy of a metastable site of the non-metal layer for decomposition, and is decomposed into carbon atoms on a surface of the non-metal layer to form the graphene,
the surface of the three-dimensional micro hole structure is provided with at least a non-flat surface, and
a conformal graphene layer is formed on the surface of the three-dimensional micro hole structure.

9. The method of claim 8 , wherein:
the three-dimensional micro hole structure includes a first hole formed in a surface of the optical fiber and a second hole connected to the first hole and adjacent to the core part; and
the second hole occupies a smaller region than the first hole.

10. The method of claim 8 , wherein the three-dimensional micro hole structure is additionally provided with an optical component therein.

11. The method of claim 8 , wherein:
the three-dimensional micro hole structure is composed of a plurality of small holes; and
the graphene layer is provided on surfaces of the plurality of small holes and thus a grating device is implemented.

12. The method of claim 8 , wherein:
the dummy substrate is a silicone substrate in which a V-shaped groove is formed, and the non-metal layer is formed on a surface of the V-shaped groove.

13. The method of claim 8 , wherein the non-metal layer is made of gamma (γ) alumina.

Assignees

• Korea Inst Sci & Tech
• Korea Inst Mach & Materials

Inventors

• Song Yong Won
• Uddin Md Siam
• Choi Jiyeon
• Kim Sungil
• Kim Dohyun

Classifications

• C03C25/1062 Primary

  Carbon · CPC title

• G02B6/02295 Primary

  Microstructured optical fibre (polarisation properties thereof G02B6/105 and G02B6/024) · CPC title

• H01S3/1608

  erbium · CPC title

• H01S3/1115

  using intracavity saturable absorbers · CPC title

• H01S3/10061

  Polarization control · CPC title