High polymer double-fiber grating micro-detection system and preparation method thereof

A dual-fiber grating and detection system technology, applied in measuring devices, using optical devices to transmit sensing components, converting sensor outputs, etc., can solve problems such as complex links, glass optical fibers that are easily broken, and susceptible to electromagnetic interference

Inactive Publication Date: 2021-01-22
浙江启兆光电科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of the existing glass optical fiber, such as easy breakage, complex link, high operating cost, and metal cables with ultra-low communication speed, suscepti...

Method used

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  • High polymer double-fiber grating micro-detection system and preparation method thereof
  • High polymer double-fiber grating micro-detection system and preparation method thereof
  • High polymer double-fiber grating micro-detection system and preparation method thereof

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preparation example Construction

[0048] see figure 1 , the preparation method of polymer double fiber grating micro-detection system of the present invention, described preparation method comprises the following steps:

[0049] (1) Polymer optical fiber:

[0050] S1: Preparation of six copolymers with different refractive indices;

[0051] S101: Add monomer M8A: perfluoro-2-methyl-4,5-methylether-1,3-dioxolane, monomer M8C: perfluoro-2-methyl-4 into the reactor - Ethyl-1,3-dioxolane, initiator;

[0052] S102: stirring and purging with nitrogen gas, after the cleaning is completed, the reactor is heated under reduced pressure to carry out the polymerization reaction;

[0053] S103: After the reaction is completed, the reactant is dissolved with the solvent hexafluorobenzene, and then precipitated with the solvent chloroform, and after repeated dissolution and precipitation, the copolymer F is obtained;

[0054] The copolymer F obtains the copolymer F1, the copolymer F2, the copolymer F3, the copolymer F4, ...

Embodiment 1

[0065] Such as image 3 As shown, the synthesis of copolymer F1

[0066] Copolymer F1 is synthesized according to the free radical polymerization route, and free radicals are provided by thermal decomposition of perfluorobenzoyl peroxide PFDBPO.

[0067] S101: Add n moles of monomer M8A: perfluoro-2-methyl-4,5-methyl ether group-1,3-dioxolane, m moles of monomer M8C: perfluoro-2- Methyl-4-ethyl-1,3-dioxolane, initiator, wherein n:m=20-95:5-80; the initiator includes perfluorodibenzoyl peroxide, the initiator The mass percentage is 0.1%;

[0068] That is, in a small reactor with good airtightness, add 258.4 grams (0.95mol) of M8A monomer and 14.7 grams (0.05mol) of M8C monomer, and then add 0.273 grams of initiator;

[0069] S102: Stir and clean with nitrogen gas. After cleaning, the reactor is depressurized to 0.3-0.8 atmospheric pressure, and heated to 70-90°C for polymerization reaction. The reaction time is 25-35h;

[0070] In this embodiment, the reaction pressure of t...

Embodiment 2

[0074] Such as image 3 As shown, the synthesis of copolymer F2

[0075] Copolymer F2 is synthesized according to the free radical polymerization route, and free radicals are provided by thermal decomposition of perfluorodibenzoyl peroxide PFDBPO.

[0076] The difference between the present embodiment and the first embodiment is: the molar mass of the M8A monomer and the M8C monomer. In this embodiment, the M8A monomer is 217.6 grams (0.8 mol), the M8C monomer is 18.8 grams (0.2 mol), and the initiator is 0.236 grams After the polymerization reaction, the copolymer F2 is obtained, and the conversion rate of the copolymer F2 is calculated to be 79%, and the thermogravimetric analysis method TGA is used to record the thermal decomposition temperature Td of the copolymer F2 in air ≥ 300 ° C, indicating that the copolymerization Material F2 has high thermal stability.

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Abstract

The invention relates to a high polymer double-fiber grating micro-detection system and a preparation method thereof. A polymer optical fiber formed by a flexible perfluoro polymer core layer with a high transmission speed and a radial gradient index and a cladding is used, and then a femtosecond laser is used for directly carrying out refractive index modulation on a plane in the axial directionof the optical fiber according to a certain distance, namely, the fiber bragg perfluoro polymer fiber grating is formed by writing or etching, then the grating is installed on a tiny flexible high polymer sleeve, and then the sleeve is fixed on a hard TPU base. Tiny changes of the external environment, like externally applied force and temperature, can change the screw pitch of the grating, so that reflected wavelength displacement changes are generated, and then data analysis is carried out by using photoelectric conversion, a data detection and analysis system and the like to obtain detection parameters.

Description

technical field [0001] The invention belongs to the field of optical fiber communication detection, and in particular relates to a high polymer double fiber grating micro detection system and a preparation method thereof. Background technique [0002] Science and technology are developing with each passing day, people's lives are improving, and various subsequent testing and detection requirements are also increasing. A variety of precision, miniaturization, and data-based detection technologies have been developed. These technological developments basically do not pay attention to the use environment, especially in flexible, dynamic, low-latency, high-speed data transmission environments, such as in vivo, or bionic environment. [0003] In the bionic and ecological environment, the "integration", sensitivity, accuracy and miniaturization of the detection equipment itself to the environment all determine the success of the bionic detection application. Recently, GOF Fiber ...

Claims

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Application Information

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IPC IPC(8): G01D5/26
CPCG01D5/268
Inventor 翁德喜
Owner 浙江启兆光电科技有限公司
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