Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of temperature insensitive optical fiber Bragg grating sensor

A fiber Bragg, grating sensor technology, applied in thermometers, thermometer parts, thermometers with physical/chemical changes, etc., can solve the problems of complex structure, high cost, limited application and promotion, etc., and achieves simple preparation process and cost. Low, easy to promote and use effects

Active Publication Date: 2019-12-03
SOUTH CHINA UNIV OF TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the fiber optic sensor came out, how to reduce the sensing error caused by the external temperature fluctuation has been a difficult point to be solved and a research hotspot. However, the existing temperature drift compensation method has the disadvantages of complex structure and high cost, which limits its application and promotion.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of temperature insensitive optical fiber Bragg grating sensor
  • Preparation method of temperature insensitive optical fiber Bragg grating sensor
  • Preparation method of temperature insensitive optical fiber Bragg grating sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Select SiO 2 -CaO-Na 2 O glass system, the specific composition of which is SiO 2 :CaO:Na 2 O=45:25:30, with SiO 2 , CaCO 3 、Na 2 CO 3 The raw materials are weighed and ground evenly according to the components, then melted at a high temperature of 1500°C, and quenched to prepare a glass block.

[0032] The second step: the prepared glass is turned and processed, combined with the quartz glass sleeve and placed in the drawing tower, and the temperature is raised to draw the optical fiber. The prepared optical fiber has an outer diameter of 150 μm and a core diameter of 14 μm.

[0033] The third step: use a laser processing system to write a fiber Bragg structure with a period of 1.06 μm and a length of 5 mm in the core of the glass fiber to obtain a multi-component glass fiber Bragg grating sensor with low temperature sensitivity. The laser parameters used are pulse width 140fs, repetition frequency 1kHz, power 200μW, focusing lens 100×1.25NA.

[0034] ...

Embodiment 2

[0038] Step 1: Select SiO 2 -CaO-Na 2 O glass system, the specific composition of which is SiO 2 :CaO:Na 2 O=65:10:25, with SiO 2 , CaCO 3 、Na 2 CO 3 The raw materials are weighed and ground evenly according to the components, then melted at a high temperature of 1450°C, and quenched to prepare a glass block.

[0039] The second step: the prepared glass is turned and processed, combined with the quartz glass sleeve and placed in the drawing tower, and the temperature is raised to draw the optical fiber. The prepared optical fiber has an outer diameter of 150 μm and a core diameter of 13 μm.

[0040] The third step: use a laser processing system to write a fiber Bragg structure with a period of 1.06 μm and a length of 4.5 mm in the core of the glass fiber to obtain a multi-component glass fiber Bragg grating sensor with low temperature sensitivity. The laser parameters used are pulse width 140fs, repetition frequency 1kHz, power 200μW, focusing lens 100×1.25NA.

[0041]...

Embodiment 3

[0043]Step 1: Select SiO 2 -ZnO-BaO-Nb 2 o 5 Glass system, the specific composition of which is SiO 2 :ZnO:BaO:Nb 2 o 5 =54:18:18:10, with SiO 2 , ZnO, BaCO 3 , Nb 2 o 5 The raw materials are weighed and ground evenly according to the components, then melted at a high temperature of 1300°C, and quenched to prepare a glass block.

[0044] The second step: the prepared glass is turned and processed, combined with the quartz glass sleeve and placed in the drawing tower, and the temperature is raised to draw the optical fiber. The prepared optical fiber has an outer diameter of 140 μm and a core diameter of 13 μm.

[0045] Step 3: Use a laser processing system to write a fiber Bragg structure with a period of 1.06 μm and a length of 4.5 mm in the core of the glass fiber to obtain a multi-component glass fiber Bragg grating sensor with low temperature sensitivity. The laser parameters used are pulse width 140fs, repetition frequency 1kHz, power 200μW, focusing lens 100×1.2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a temperature insensitive optical fiber Bragg grating sensor and a preparation method thereof. The preparation method includes the following steps: (1)preparing a fiber core of an optical fiber: melting a glass component system to prepare a glass block body; (2) turning the glass block body in step (1), and then combining, by means of drawing, the glass block body with a cladding casing pipe to prepare a glass optical fiber having a core layer-cladding structure; and (3) inscribing an optical fiber Bragg optical grating structure in the glass optical fiber to obtain the temperature insensitive optical fiber Bragg grating sensor. The method proposed by the invention can reduce the temperature sensitivity of the optical fiber Bragg grating sensor, can help reduce errors caused by temperature change in a non-temperature sensing process, and is suitable for a non-temperature sensing occasion where temperature of a working environment of thesensor changes greatly.

Description

technical field [0001] The invention belongs to the technical field of optical fibers, and in particular relates to a temperature-insensitive fiber Bragg grating sensor and a preparation method thereof. Background technique [0002] Optical fiber sensor is a new type of sensor that uses optical fiber as a carrier to convert external physical signal changes into optical signal changes to achieve sensing purposes. Compared with traditional electronic sensors, optical fiber sensors have many advantages such as miniaturization, anti-electromagnetic interference, high sensitivity, variable shape and structure, and low manufacturing cost. Both fields have practical applications and have great potential. Since the fiber optic sensor came out, how to reduce the sensing error caused by the external temperature fluctuation has been a difficult point to be solved and a research hotspot. However, the existing temperature drift compensation method has the disadvantages of complex struct...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K1/20
CPCG01K1/20G01K11/3206
Inventor 周时凤林梓宇冯旭蓝碧蛟
Owner SOUTH CHINA UNIV OF TECH