Asymmetric birefringence vortex fiber and manufacturing method of asymmetric birefringence vortex fiber

A birefringence and asymmetric technology, applied in cladding optical fiber, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of difficult preparation of optical fiber, and achieve the effect of good spatial flexibility and simple preparation

Active Publication Date: 2014-08-06
GUILIN UNIV OF ELECTRONIC TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Although the structure of the vortex beam generator is extremely simple, it is very difficult to prepare such an optical fiber. Therefore, the present invention proposes a new type of asymmetric birefringent vortex optical fiber based on the technology of polarization-maintaining optical fiber. The preparation of this vortex optical fiber Relatively easy, can generate vortex-like beams

Method used

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  • Asymmetric birefringence vortex fiber and manufacturing method of asymmetric birefringence vortex fiber
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  • Asymmetric birefringence vortex fiber and manufacturing method of asymmetric birefringence vortex fiber

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preparation example Construction

[0031] Secondly, the preparation method of the asymmetric birefringent vortex fiber is given. The preparation process of this asymmetric birefringent vortex fiber with a single helical stress region can be divided into the following steps (such as Figure 6 and Figure 7 ):

[0032] Step 1: If Figure 6 , punching an eccentric hole 7 in the optical fiber preform 6 containing the core 5, and then inserting the stress region preform 8 into the eccentric hole 7, thus obtaining an optical fiber preform 9 with a single stress region;

[0033] Step 2: If Figure 7 , the optical fiber preform 9 is placed on the drawing tower, under the joint action of the vertical traction force 10 and the torsional force 11, it is twisted and drawn, and after heating and corresponding post-treatment 12, it is prepared into an asymmetric birefringent vortex with a single helical stress region Spin the fiber 13.

[0034] combine Figure 8 and Figure 9 Different from the first embodiment, the a...

Embodiment 1

[0039] 1. Optical fiber preparation: according to the optical fiber preparation method of the first embodiment, an asymmetric birefringent vortex optical fiber 13 with a single helical stress region is prepared;

[0040] 2. Light source coupling: cutting the prepared asymmetric birefringent vortex fiber 13 with a single helical stress region, and then aligning and welding it with the single-mode fiber 20 with a light source pigtail, such as Figure 13 shown;

[0041] 3. Generation of vortex beams: After inputting the laser light 21, the transmission of vortex light mode can be realized in the asymmetric birefringent vortex fiber 13 with single helical stress region, and the quasi-vortex beam can be output at the fiber end.

Embodiment 2

[0043] 1. Optical fiber preparation: according to the optical fiber preparation method of the second embodiment, an asymmetric birefringent vortex optical fiber 19 with a double helical stress region is prepared;

[0044] 2. Light source coupling: cutting the prepared asymmetric birefringent vortex fiber 19 with a double-helix stress zone, and then aligning and welding it with the single-mode fiber 20 with a light source pigtail, such as Figure 14 shown;

[0045] 3. Generation of vortex beams: After inputting laser light 21, vortex light mode transmission can be realized in the asymmetric birefringent vortex fiber 19 with double helical stress region, and vortex-like beams can be output at the fiber end.

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Abstract

The invention discloses an asymmetric birefringence vortex fiber and a manufacturing method of the asymmetric birefringence vortex fiber. The asymmetric birefringence vortex fiber is formed by drawing an optical fiber perform with a single stress area or dual stress areas in a rotary mode, and therefore the asymmetric birefringence vortex fiber has a single spiral stress area or dual spiral stress areas; in addition, due to asymmetric distribution of the stress areas or different materials of the stress areas, spirally-distributed asymmetric stress birefringence is generated in a fiber core of the asymmetric birefringence vortex fiber, a radial phase difference of transmission light waves is accordingly formed, the light waves transmitted in the asymmetric birefringence vortex fiber can accordingly obtain the orbital annular momentum, vortex phase transmission is generated, and a similar vortex light transmission mode is achieved. The asymmetric birefringence vortex fiber overall has the advantages of being tiny in structure, flexible in operation, stable in system, high in interference resistant capacity and the like, and can be used for vortex beam generation, particle control, sensing application and the like.

Description

(1) Technical field [0001] The invention relates to an optical fiber and a preparation technology thereof, in particular to an asymmetric birefringent vortex optical fiber and a preparation method thereof, belonging to the technical field of optical fibers. (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 fiber-based vortex light generator has more advantages in remote interaction and system miniaturization. Researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02C03B37/012
Inventor 苑立波邓洪昌
Owner GUILIN UNIV OF ELECTRONIC TECH
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