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Implementing method of novel long-cycle fiber bragg grating

A technology of fiber grating and realization method, applied in cladding fiber, optical waveguide light guide, etc., can solve problems such as limited tuning performance and application limitation, and achieve the effect of expanding the scope of application

Inactive Publication Date: 2016-11-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The long-period gratings involved at this stage have limited tuning performance due to their fixed structures, which limits their applications

Method used

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  • Implementing method of novel long-cycle fiber bragg grating
  • Implementing method of novel long-cycle fiber bragg grating
  • Implementing method of novel long-cycle fiber bragg grating

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0028] In the embodiment of the present invention, a liquid core fiber will be used as an example of this type of hybrid fiber, and a high-precision heating array will be designed to realize a programmable long-period fiber grating, and its programming characteristics will be described. The cross-sectional structure of the liquid core fiber is as follows figure 1 Shown:

[0029] Under the premise of selecting a reasonable liquid material, the liquid core optical fiber is an excellent waveguide structur...

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Abstract

The invention provides an implementing method of a novel long-cycle fiber bragg grating. The implementing method is characterized in that an optical fiber is a mixed optical fiber, a fiber core has high thermo-optical coefficient, a coating layer has low thermo-optical coefficient, the enough large change of refraction rate is produced to the fiber core by lower temperature, and the modulation of refraction rate required by the long-cycle fiber bragg grating is realized; a programmable heating array is used for controlling the change of temperature gradient of a waveguide structure, the distribution of refraction rate on the waveguide is further controlled by the controllable temperature gradient, and the programmable long-cycle fiber bragg grating is realized. The implementing method of the novel long-cycle fiber bragg grating has the characteristics that the digital programming is realized; the properties can be changed in real time according to application requirements; the insertion loss is low, and the power consumption is low.

Description

technical field [0001] The invention relates to a new long-period optical fiber grating realization method, and the long-period optical fiber grating has the characteristic of digital programming. Background technique [0002] From the perspective of the implementation method of long-period fiber gratings, we found many related invention patents and papers: using electric arcs, high-power lasers to cause periodic deformation of optical fibers to realize long-period gratings, or using high-power ultraviolet light or electrons The bundle realizes the periodic refractive index modulation of the optical fiber. Many related patents have also been retrieved from the perspective of adjustable long-period fiber gratings. But from the perspective of programmable long-period fiber gratings, no similar prior art has been found. [0003] Traditional LPFGs cannot be restructured after one preparation. As an important photonic device, long-period gratings play an important role in vari...

Claims

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Application Information

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IPC IPC(8): G02B6/02
Inventor 戚涛肖石林
Owner SHANGHAI JIAO TONG UNIV