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Continuous production method of fiber bragg grating (FBG)

A technology of fiber grating and production method, which is applied in the directions of cladding fiber, optical waveguide light guide, light guide, etc., can solve the problems of high maintenance cost, low production efficiency, high manufacturing cost, etc., and achieves reduction of manual operation, production cost, maintenance high cost effect

Inactive Publication Date: 2016-08-24
西安盛佳光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because before and after the grating is written, it is necessary to manually fix the optical fiber from the fiber holder and remove the optical fiber, so the production efficiency is low, which makes the manufacturing cost of the fiber grating higher; The time pause makes the energy of the laser beam of the laser unable to be effectively used during the pause time, and the laser, as an important and expensive equipment for the production of fiber gratings, needs frequent maintenance, and the maintenance cost is expensive, which virtually increases the manufacturing cost of the fiber grating
[0004] With the rapid development of the optical communication industry, especially the implementation of FTTH projects around the world, the demand for fiber gratings is increasing day by day. Become the trend of future development

Method used

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  • Continuous production method of fiber bragg grating (FBG)
  • Continuous production method of fiber bragg grating (FBG)
  • Continuous production method of fiber bragg grating (FBG)

Examples

Experimental program
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Effect test

Embodiment 1

[0045] see figure 2 . In this embodiment, the laser beam 1 enters the phase mask 3 through the reflector vertically through the diaphragm 2 after being incident from the horizontal direction, and the phase mask is fixed so that the bare optical fiber 5 is continuously intermittent on one side of the phase mask. Linear motion enables continuous production of fiber gratings.

[0046] A kind of continuous production method of fiber grating of the present embodiment, comprises the following steps:

[0047] 1. After taking several meters of optical fiber 7 and carrying hydrogen under high pressure, all the coating layer on the optical fiber 7 is removed to form a bare optical fiber 5;

[0048] 2. Take the bare optical fiber 5 with the coating removed, pass the front end of the bare optical fiber 5 through the optical fiber support frame 9 on the front side of the phase mask 3, and then clamp and fix the bare optical fiber 5 on both sides of the optical fiber support frame 9 to t...

Embodiment 2

[0057] see image 3 . The difference between embodiment 2 and embodiment 1 is that the bare optical fiber 5 of embodiment 2 is a continuous window bare optical fiber, and the continuous window bare optical fiber is formed by stripping the optical fiber 7 in continuous intervals and segments to form several intervals of connected bare optical fiber segments, such as Figure 4 As shown, that is, the coating layer of equal length is removed at intervals on the optical fiber 7 to form a continuous window bare fiber, and the grating is written on each bare fiber segment of the continuous window bare fiber. When the bare optical fiber is a continuous window bare optical fiber, the distance between the optical fiber clamping and pulling device 8 and the fiber support frame 9 is set equal to the interval between the window bare optical fiber, so as to ensure that the optical fiber 7 is just clamped on the optical fiber clamping and pulling device 8 and Located on the fiber support fr...

Embodiment 3

[0059] For different grating parameters, the writing time of the laser beam is different. When the grating of the same parameter is continuously written, the time of the laser beam writing the grating is the same. At this time, the pigtail of the bare fiber does not need to be connected to an optical spectrum analyzer to monitor the grating parameters, just by controlling the time of laser beam writing grating. therefore

[0060] The difference between this embodiment and Embodiment 1 is that an optical spectrum analyzer is not required to monitor the parameters of the written grating in real time during the writing process, and only the writing time needs to be controlled, that is, the laser beam 1 is incident on the phase mask 3 and passes through the phase The mask plate diffracts to the bare optical fiber 5 at the same time, making the laser beam incident on the phase mask plate diffracted to the bare optical fiber through the phase mask plate at the same time.

[0061] S...

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Abstract

The invention belongs to the field of manufacturing of passive components of optical communication, relates to a continuous production method of a fiber bragg grating (FBG), and aims to solve the problem of the existing FBG production that a single fiber is inscribed, that is, the single fiber is positioned on an fiber clamp and then a laser beam is controlled to perform grating inscribing, the FBG is removed from the fiber clamp after inscribing, and the whole operation is manually performed, so that the production efficiency is low. The continuous production method of the FBG is characterized in that a bare fiber and a phase mask are controlled to oppositely continuously perform intermittent linear motion to achieve the continuous production of the FBG. According to the continuous production method of the FBG, the bare fiber is continuously horizontally transversely moved to achieve the continuous production of the FBG, so that a large number of manual operations can be decreased, the production efficiency of the FBG is improved by times, and the manufacturing cost of the FBG can be obviously reduced.

Description

technical field [0001] The invention belongs to the field of optical communication passive device manufacturing, relates to the production of fiber gratings (FBG), and specifically refers to a continuous production method of fiber gratings. Background technique [0002] Fiber Bragg Grating (FBG) is a spatial phase grating formed in the fiber core by using the photosensitivity of fiber through ultraviolet exposure, which can constitute many passive devices with unique performance. Fiber Bragg Grating has been widely used in optical communication, optical fiber sensing and other fields due to its advantages of anti-electromagnetic interference, light weight, small size, stable chemical properties and electrical insulation. [0003] In 1993, K.O.HiLL and others proposed the phase mask method to make fiber gratings. The phase mask method to make fiber gratings is based on the spatial interference fringes generated by the near-field diffraction of the phase mask to form periodic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
CPCG02B6/02138
Inventor 李忠志王彬杨立锋
Owner 西安盛佳光电有限公司