Method for continuously preparing fiber gratings on line

A fiber grating and grating technology, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of poor reliability of fiber grating, poor consistency of fiber background temperature, etc., to eliminate mutual constraints, high-precision control of bare fiber diameter, The effect of ensuring stable operation

Inactive Publication Date: 2012-07-18
WUHAN UNIV OF TECH
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Problems solved by technology

[0010] The purpose of the present invention is to propose a new online continuous method for preparing fiber gratings in view of the many technical difficulties and technical deficiencies that are difficult to overcome in the traditional dynamic online grating method, as well as the poor reliability of the continuous preparation of fiber gratings based on finished optical fibers.
This method implements the traditional optic...

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  • Method for continuously preparing fiber gratings on line
  • Method for continuously preparing fiber gratings on line
  • Method for continuously preparing fiber gratings on line

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Embodiment Construction

[0024] specific implementation plan

[0025] Embodiments of the present invention will be described with reference to the drawings. In addition, in description of drawings, the same code|symbol is attached|subjected to the same unit, and repeated description is abbreviate|omitted.

[0026] figure 1 Schematic drawing and take-up of bare optical fiber. This process is basically the same as conventional optical fiber drawing, the only difference is that there is no coating and curing process for optical fiber protective layer. Under the action of high temperature in the wire drawing furnace 2, the lower end of the preform is melted and taped to form a wire, and is drawn into the wire drawing wheel 6 through the tension measuring instrument 5 to form a bare optical fiber; the diameter of the bare optical fiber is monitored by the bare optical fiber caliper 3 and the prefabrication is controlled by real-time feedback The speed of the rod feeding device 1 and the bare optical fib...

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Abstract

The invention discloses a method for continuously preparing fiber gratings on line. According to the method, coating and curing of a prefabricated bar high-temperature drawn bare fiber and a bare fiber protective layer are separated. By the method, adverse interaction between a wire drawing process and an on-line grating write-in and coating process is eliminated; the method is easy to control; and the operation of a system is stable. In addition, mutual constraint factors between the processes are eliminated, the two processes are respectively performed under optimal process conditions, and many technical problems of conventional dynamic on-line grating formation are well solved.

Description

technical field [0001] The invention belongs to the field of optical fiber grating preparation, and relates to a method for continuously writing gratings online during the optical fiber preparation process, in particular to a method for writing identical gratings with a large capacity. Background technique [0002] The large-capacity distributed optical fiber sensing system based on optical fiber gratings has broad application prospects, and its core preparation technology requires gratings to be written in different positions on a long-distance optical fiber to introduce as little insertion loss as possible. The traditional fiber grating preparation method is to prepare the grating first, and then use welding technology to connect all the gratings in series. This method causes significant insertion loss. At the same time, welding causes damage to the optical fiber structure, resulting in poor system reliability. Therefore, scientific research workers began to explore the p...

Claims

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Application Information

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IPC IPC(8): G02B6/02
Inventor 姜德生郭会勇余海湖李小甫
Owner WUHAN UNIV OF TECH
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