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System and method for adjusting deflection of micro-nano fiber end face by changing input laser polarization

A micro-nano fiber, input-changing technology, applied in the direction of laser, optical waveguide coupling, laser components, etc., can solve the problems of micro-nano fiber limitation, inability to realize fiber deflection, etc., to improve flexibility, variable fiber deflection, Broaden the effect of application scenarios

Active Publication Date: 2021-07-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After the fiber structure is fixed, the existing method can only generate a non-zero optical force on one side of the fiber, that is, the end of the fiber will only deflect to a certain direction of fiber structure asymmetry, and cannot achieve more dimensional fiber deflection
At the same time, the existing methods cannot achieve variable and flexible fiber deflection under the condition that the fiber structure remains unchanged, which limits the practical application of micro-nano fibers

Method used

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  • System and method for adjusting deflection of micro-nano fiber end face by changing input laser polarization
  • System and method for adjusting deflection of micro-nano fiber end face by changing input laser polarization
  • System and method for adjusting deflection of micro-nano fiber end face by changing input laser polarization

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Effect test

Embodiment 1

[0045]A system that changes the input laser polarization to adjust the deflection of the micro-nano fiber end face, such as Figure 1-5 As shown, the laser is located on one side of the fiber, and the laser light emitted by the laser enters the fiber through the polarizer and the coupling lens for transmission. The end face of the micro-nano fiber is inclined, the micro-nano fiber is placed vertically in a closed transparent cavity, the microscope and the recorder are placed on one side of the transparent cavity, and the microscope and the end of the micro-nano fiber are aligned to observe and record the deflection of the micro-nano fiber.

[0046] The optical fiber adopts single-mode optical fiber, the material is silica, and the refractive index is about 1.46 at 532nm; the end of the optical fiber is about 15μm, and it is drawn into a micro-nano optical fiber with a diameter of about 500nm by thermal stretching method, and the micro-nano optical fiber The end is cut into an ...

Embodiment 2

[0053] This embodiment is substantially the same as Embodiment 1, except that the fiber polarization controller is adjusted so that the laser polarization is converted to the y-line polarization state, and the deflection change at the end of the micro-nano fiber is observed. Micro-nano fiber structure such as Figure 5 As shown, the y-polarized light is transmitted in the micro-nano fiber, and it can be observed that the end of the micro-nano fiber is deflected to the x-axis direction.

[0054] If the polarization of the laser transmitted in the micro-nano fiber is first converted to a circular polarization state and then to a y-polarized state, it can be seen that the deflection direction at the end of the micro-nano fiber changes.

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Abstract

The invention belongs to the field of micro-optical machinery, and relates to a system for adjusting the deflection of micro-nano optical fiber end faces by changing the input laser polarization, including: lasers, polarizers, coupling lenses, optical fiber polarization controllers, optical fibers, micro-nano optical fibers, and airtight transparent cavities , where: the laser is located on one side of the fiber, the laser enters the fiber through the polarizer and the coupling lens for transmission, the fiber polarization controller is located in the middle of the fiber, a length of the end of the fiber is drawn into a micro-nano fiber, and the end face of the micro-nano fiber is inclined, The micro-nano fiber is placed vertically in a closed transparent cavity. In the present invention, by adjusting the laser polarization input into the micro-nano optical fiber, the deflection transition occurs at the end of the optical fiber, which can not only break the traditional single asymmetric structure to cause the imbalance of optical power, but also realize the polarization of the excitation light source by changing the optical fiber structure when the optical fiber structure is fixed. Produce controllable, multi-dimensional fiber deflection. The invention also provides a method for adjusting the deflection of the micro-nano optical fiber end face by changing the input laser polarization.

Description

technical field [0001] The invention belongs to the field of micro-optical mechanics, and relates to a system and a method for adjusting the deflection of a micro-nano optical fiber end face by changing the polarization of input laser light. Background technique [0002] Electromagnetic waves carry energy, linear momentum, and angular momentum. When light interacts with matter, the energy and momentum between them are exchanged with each other, thereby generating light force. In recent years, the research on optical force has gradually increased, making the application scenarios of optical force more and more extensive. For example, the use of gradient force to realize the capture and manipulation of particles, the use of the angular momentum carried by photons themselves to drive the rotation of micro gears, the use of The radiation pressure of light makes interstellar solar sails, etc. It was observed experimentally that the continuous wave light source passing through a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/27H01S3/00
CPCG02B6/2726H01S3/0071
Inventor 虞华康吴婉玲王向珂伦一鹏李志远
Owner SOUTH CHINA UNIV OF TECH