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Method and device for manufacturing chirality fiber Bragg grating

An optical fiber and chiral technology, which is applied in the field of manufacturing chiral fiber Bragg gratings, can solve problems such as the inability to produce chiral fiber Bragg gratings, and achieve the effect of easy implementation and simple method

Active Publication Date: 2014-10-08
CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above analysis, the present invention aims to provide a method and device for making chiral fiber Bragg gratings, in order to solve the problem that chiral fiber Bragg gratings cannot be produced in the prior art

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  • Method and device for manufacturing chirality fiber Bragg grating
  • Method and device for manufacturing chirality fiber Bragg grating
  • Method and device for manufacturing chirality fiber Bragg grating

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Embodiment Construction

[0030] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention. For the sake of clarity and simplicity, detailed descriptions of known functions and constructions in the devices described herein will be omitted when it may obscure the subject matter of the present invention.

[0031] The main purpose of the embodiments of the present invention is to provide a method and device for making chiral fiber Bragg gratings. The present invention only selects a suitable polarized birefringent material and a laser with a corresponding wavelength, and makes the circular polarization of the same helix transmitted in opposite directions The laser interferes in the fiber core of the polarized birefringence material to generate bire...

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Abstract

The invention discloses a method and device for manufacturing a chirality fiber Bragg grating. The method includes the steps that same spiral circular polarization lasers transmitted in the opposite directions interfere with each other in a fiber core made of polarized light birefringent material to generate spiral polarization standing waves, the refraction rate of the fiber core made of the polarized light birefringent material is modulated through the spiral polarization standing waves so that the fiber core made of the polarized light birefringent material can generate birefringence with the main axis rotating along the fiber, the left hand screw or right hand screw chirality fiber Bragg grating is obtained, and the main axis of the birefringence is in the polarization direction of light beams and in the direction perpendicular to the polarization and propagation direction. The method is simple and easy to achieve.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing and communication, in particular to a method and device for manufacturing chiral optical fiber Bragg gratings. Background technique [0002] According to different periods, chiral fiber gratings can be divided into: 1) long-period chiral fiber gratings (period hundreds of microns to millimeters), 2) medium-period chiral fiber gratings (period tens to hundreds of microns), 3) Short-period chiral fiber gratings, also known as chiral fiber Bragg gratings (period on the order of microns). The first two types of gratings have a long period and can be produced by rapidly rotating the preform or twisting the fiber in the molten state when the fiber preform is drawn into the fiber, but for the chiral fiber Bragg grating with a period of micron level, it is difficult to pass the above method, because it is difficult to twist an optical fiber in a micron-scale length. Contents of the invent...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
Inventor 许华醒杨利张晓波
Owner CHINA ACADEMY OF ELECTRONICS & INFORMATION TECH OF CETC