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Single-mode sapphire fiber grating and preparation method thereof

A fiber grating, sapphire technology, applied in cladding fiber, grating fiber, optical waveguide light guide, etc., can solve problems such as large insertion loss and poor spectral quality

Pending Publication Date: 2019-09-17
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a single-mode sapphire fiber grating and its preparation method for the problems of large insertion loss and poor spectral quality of multimode sapphire fiber gratings

Method used

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  • Single-mode sapphire fiber grating and preparation method thereof
  • Single-mode sapphire fiber grating and preparation method thereof
  • Single-mode sapphire fiber grating and preparation method thereof

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0042] In the first example, see figure 1 , figure 2 with image 3 , a method for preparing a single-mode sapphire fiber grating, comprising the following steps:

[0043] Clamp and fix the sapphire fiber a on the displacement platform;

[0044] Adjust the displacement platform so that the laser emitted by the femtosecond laser b shoots vertically to the sapphire fiber a;

[0045] Adjust the femtosecond laser b so that the laser forms the first focused spot on one side of the center of the sapphire fiber a, the displacement platform drives the sapphire fiber a to mov...

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Abstract

The invention relates to a preparation method of a single-mode sapphire fiber grating. The preparation method comprises the following steps: clamping and fixing a sapphire fiber on a displacement platform; adjusting the displacement platform so that laser transmitted by a femtosecond laser device is vertically shot into the sapphire fiber; adjusting the femtosecond laser device so that a first focusing light spot and a second focusing light spot are formed by laser on two sides of the center of the sapphire fiber in sequence, wherein the displacement platform drives the sapphire fiber to move along the axial direction at a constant speed so as to prepare a single-mode sapphire fiber; and writing a grating into the single-mode sapphire fiber so as to obtain the single-mode sapphire fiber grating. According to the preparation method of the single-mode sapphire fiber grating, the single-mode sapphire fiber grating with small insertion loss, narrow bandwidth and high precision can be obtained.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication and sensing, in particular to a single-mode sapphire fiber grating and a preparation method thereof. Background technique [0002] Fiber Bragg Grating has a series of excellent performances such as wide reflection bandwidth, small additional loss, small size, easy coupling with optical fiber, compatibility with other optical devices, and no influence of environmental dust. It is widely used in the field of optical fiber communication and sensing very important device. With the development of science and technology, in order to meet the different needs of various fields, various fiber gratings with excellent performance have been developed. [0003] Silica fiber is prepared by doping and drawing, which can obtain a low refractive index cladding and a high refractive index core, thereby forming a waveguide capable of single-mode transmission. Single crystal sapphire fiber is a ...

Claims

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Application Information

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IPC IPC(8): G02B6/02
CPCG02B6/02057G02B6/02133G02B6/02138G02B6/02147
Inventor 何俊王义平徐锡镇
Owner SHENZHEN UNIV
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