Parallel multi-angle tilted fiber bragg grating and preparation method thereof

A fiber Bragg, multi-angle technology, applied in cladding optical fiber, optical waveguide light guide, light guide, etc., can solve the problems of large limitations, and achieve the effect of being suitable for batch processing, accurate angle, and simple operation

Active Publication Date: 2018-07-24
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Parallel multi-angle tilted fiber bragg grating and preparation method thereof
  • Parallel multi-angle tilted fiber bragg grating and preparation method thereof
  • Parallel multi-angle tilted fiber bragg grating and preparation method thereof

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Embodiment 1

[0048] like figure 1 As shown, this embodiment takes the processing of 2°+8° double-angle tilted fiber Bragg grating as an example, the details are as follows:

[0049] Raw materials: Corning SMF-28 single-mode optical fiber with a cladding diameter of 125 μm and a core diameter of 9 μm.

[0050] The preparation steps and detailed implementation of the 2°+8° dual-angle tilted fiber Bragg grating are specifically described as follows:

[0051] (1) Remove about 2 cm of the coating layer from the middle part of the optical fiber 6, and clean it with a dust-free paper stained with alcohol;

[0052] (2) Fix the optical fiber 6 on the optical fiber holder 5 , wherein the part where the coating layer is stripped faces the phase mask 3 . The laser is focused on the upper half inside the fiber core by adjusting the three-dimensional moving platform 4 . The pulse width of femtosecond laser 1 is 100fs, and the power is set to 600mW. According to the desired processing angle 2°, the s...

Embodiment 2

[0056] In this embodiment, the processing of 6°+11°+15° three-angle inclined fiber Bragg grating is taken as an example, the details are as follows:

[0057] Raw materials: Corning SMF-28 single-mode optical fiber with a cladding diameter of 125 μm and a core diameter of 9 μm.

[0058] The preparation steps and detailed implementation of the 6°+11°+15° three-angle tilted fiber Bragg grating are specifically described as follows:

[0059] (1) Remove about 2 cm of the coating layer from the middle part of the optical fiber 6, and clean it with a dust-free paper stained with alcohol;

[0060] (2) Fix the optical fiber 6 on the optical fiber holder 5 , wherein the part where the coating layer is stripped faces the phase mask 3 . The laser is focused on the upper third of the fiber core by adjusting the three-dimensional moving platform 4 . The pulse width of femtosecond laser 1 is 100fs, and the power is set to 600mW. According to the desired processing angle of 6°, the scannin...

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Abstract

The present invention provides a parallel multi-angle tilted fiber bragg grating. In the same position of a fiber, in a direction being perpendicular to the axial direction of the fiber, the internalportion of the fiber core of the fiber has a plurality of different portions, wherein one tilted fiber bragg grating structure is prepared in each portion, the extension directions of the grating periodic structures of each two adjacent portions are parallel, and the titled angles of the grating periodic structures are different. After experimental verification, compared to a corresponding single-angle title fiber bragg grating, the parallel multi-angle tilted fiber bragg grating can obtain cladding mode response with a wider range and can be applied to refractive index measurement with a wider range. The present invention further provides a preparation method of a parallel multi-angle tilted fiber bragg grating.

Description

technical field [0001] The invention belongs to the technical field of fiber optics and sensors, and relates to a parallel multi-angle inclined fiber Bragg grating and a preparation method thereof. Background technique [0002] Since the 21st century, fiber optic technology and related applications have continued to develop and progress. Various fiber optic sensors based on fiber optics have been widely used in civil engineering, mining, electric power, railways, aerospace and other fields. Among them, the fiber grating is an indispensable key device. [0003] Tilted fiber grating (TFBG) is a kind of fiber grating with special structure. Its grating structure stripes are not perpendicular to the fiber axis, but have a certain angle. When the core mode is transmitting, a part of the light will be coupled to the reverse transmission mode like a uniform Bragg grating, forming a Bragg reflection peak in the reflection spectrum. In addition, there will be a series of wavelengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
CPCG02B6/02076G02B6/02123
Inventor 司金海陈涛王瑞泽范春松闫理贺侯洵
Owner XI AN JIAOTONG UNIV
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