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Vortex optical fiber on basis of spiral eccentric hole integrating embedded core and preparation method thereof

A technology of optical fiber preform and partial hole, which is applied in the direction of clad optical fiber, glass manufacturing equipment, manufacturing tools, etc., can solve the problems such as the difficulty of preparing optical fiber, and achieve the effect of good spatial flexibility and simple preparation

Inactive Publication Date: 2014-08-06
无锡万润光子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the structure of the vortex beam generator is very simple, it is very difficult to prepare such an optical fiber. Therefore, the present invention proposes a new helical off-hole fusion core vortex optical fiber. This vortex optical fiber is relatively easy to prepare and can produce similar Vortex beam

Method used

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  • Vortex optical fiber on basis of spiral eccentric hole integrating embedded core and preparation method thereof
  • Vortex optical fiber on basis of spiral eccentric hole integrating embedded core and preparation method thereof
  • Vortex optical fiber on basis of spiral eccentric hole integrating embedded core and preparation method thereof

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preparation example Construction

[0028] The preparation process of the optical fiber can be divided into the following steps (such as Figure 6-Figure 8 ):

[0029] Step 1: to the optical fiber preform rod 6 with core 5 (such as Figure 6 ) into an eccentric air hole 7 to form a new optical fiber preform 8 (such as Figure 7 );

[0030] Step 2: Place the optical fiber preform 8 on the drawing tower, perform torsional drawing under the joint action of the vertical traction force 9 and the torsional force 10, and prepare the helical eccentric fused-core vortex optical fiber after heating and corresponding post-processing 11 12 (the offset hole is located on the core side).

[0031] combine Figure 9-Figure 10 , the second embodiment of the present invention has a section of helical off-hole fused core vortex fiber, which includes a cladding 1, a core 2 and a single helical air hole 3, wherein the core 2 is located in the center of the fiber, and partially fused Embedded in the cladding 1 of the inner wall ...

Embodiment 1

[0037] 1. Optical fiber preparation: according to the optical fiber preparation method of the first embodiment, the helical off-hole fusion core vortex optical fiber 12 is prepared;

[0038] 2. Light source coupling: cut the prepared helical off-hole fused core-embedded vortex fiber 12, and then align and weld it with the single-mode fiber 18 with light source pigtail, such as Figure 13 shown;

[0039] 3. Generation of vortex beams: After inputting laser light 19, vortex light mode transmission will be realized in helical off-hole fused-core vortex fiber 12, and vortex-like beams can be output at the fiber end.

Embodiment 2

[0041] 1. Optical fiber preparation: according to the optical fiber preparation method of the second embodiment, the helical off-hole fusion core vortex optical fiber 17 is prepared;

[0042] 2. Light source coupling: Cut the prepared helical off-hole fused core-embedded vortex fiber 17, and then align and weld it with the single-mode fiber 18 with the light source pigtail, such as Figure 14 shown;

[0043]3. Generation of vortex beams: After inputting laser light 19, vortex light mode transmission will be realized in helical off-hole fused-core vortex fiber 17, and quasi-vortex beams can be output at the fiber end.

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Abstract

The invention discloses a vortex optical fiber on basis of a spiral eccentric hole integrating embedded core and a preparation method thereof. The optical fiber is formed by rotating and pulling an optical fiber prefabricated rod with an eccentric hole, and therefore a single-screw air hole exists in the optical fiber. Because of the asymmetric optical fiber structure, asymmetric stress birefringence of spiral distribution can be generated in the fiber core of the optical fiber, conduction optical waves can form radial phase differences, orbital angular momentum is obtained, transmission of a vortex phase position optical field is generated, and a vortex-like optical transmission mode is formed. The whole optical fiber has the advantages of being simple in structure, flexible in operation, stable in system, high in antijamming capability and the like, and can be used for vortex light beam generation, particle control, sensing application and other aspects.

Description

(1) Technical field [0001] The invention belongs to the field of optical fiber technology, and in particular relates to a helical off-hole fusion-embedded vortex optical fiber and a preparation method thereof. (2) Background technology [0002] A remarkable feature of vortex beams is that they have orbital angular momentum (Physical Review A, 1992, 45(11): 8185-8189), so they have been widely studied in recent years and have been widely used in communication, optical tweezers, atom manipulation and microscopy has been greatly applied. The most common way to generate vortex beams is to use spatial light modulators (OpticsExpress, 2008, 16(21): 16984-16992), however, spatial light modulators are generally bulky, expensive, and require optical coupling in free space , which causes a lot of inconvenience. [0003] The optical fiber-based vortex light generator has more advantages in the realization of remote interaction and compact vortex optical devices. Researchers have rea...

Claims

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Application Information

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IPC IPC(8): G02B6/02C03B37/025
Inventor 苑立波邓洪昌
Owner 无锡万润光子技术有限公司
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