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Multifunctional sensor with microstructure fiber surface plasma resonance and preparation method thereof

A technology of surface plasmon and micro-structured optical fiber, applied in the direction of material excitation analysis, thermal excitation analysis, etc., can solve the problems of limited application, achieve good sensing characteristics, high measurement accuracy, and unique magneto-optical effect

Active Publication Date: 2019-02-19
南通畅衡智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the researches mentioned above, the photonic crystal fiber surface plasmon resonance sensor has only completed the detection of a single physical quantity, and can only detect one property at a time, which limits its application to a certain extent.

Method used

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  • Multifunctional sensor with microstructure fiber surface plasma resonance and preparation method thereof
  • Multifunctional sensor with microstructure fiber surface plasma resonance and preparation method thereof
  • Multifunctional sensor with microstructure fiber surface plasma resonance and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] refer to figure 1 , a kind of microstructure optical fiber surface plasmon resonance multifunctional sensor, the photonic crystal fiber base 12 both sides of this optical fiber sensor are provided with fan-shaped opening 13, the surface of described fan-shaped opening 13 is coated with gold film 10, adopts magnetron sputtering method Deposit gold film 10 on the plane of two fan-shaped openings 13, the thickness of preparation gold film is 30~50nm, because the variation of gold film 10 temperature can make the absorption peak position of optical fiber output end spectrum change, so gold film 10 is used as The temperature sensing detection layer of surface plasmon resonance; the tip of the fan-shaped opening 13 bottom is provided with a silver nanowire 9, which is used to enhance the surface plasmon resonance effect and improve the sensitivity of the sensor; in the core 8 of the photonic crystal fiber substrate 12 A magnetic fluid 14 is provided, and cladding air holes 11...

Embodiment 2

[0034] A preparation method of a microstructure optical fiber surface plasmon resonance multifunctional sensor, the preparation method comprising the following steps:

[0035] Step 1: Take a hollow photonic crystal fiber, remove the outer coating layer, cut and flatten the end faces of the two fibers with a fiber cutter;

[0036] Step 2: Polish the photonic crystal optical fiber treated in step 1 by polishing the base block with an arc-shaped groove on the side of the optical fiber, first fix the optical fiber on a glass base block with an arc-shaped groove on it with glue, Fix the optical fiber with epoxy glue, then use an optical polishing machine to polish the optical fiber, and polish the fan-shaped openings on both sides of the photonic crystal fiber base. After polishing, dissolve the epoxy glue used for fixing with epoxy glue solution , so as to take out the polished photonic crystal fiber;

[0037] Step 3: Fill the silver nanowires with the method of extracting and inje...

Embodiment 3

[0042] refer to Figure 2-6 , a measurement method using a microstructure optical fiber surface plasmon resonance multifunctional sensor, the measurement method is: the measurement equipment mainly includes a wide-spectrum light source 1, a polarizer 2, a polarization controller 3, and a microstructure optical fiber surface plasmon resonance multifunctional sensor. Sensor 4, spectrometer 5 and computer 6; Described wide-spectrum light source 1 is connected with common single-mode optical fiber at one end of microstructure optical fiber surface plasmon resonance multifunctional sensor 4 through optical fiber connector, common single-mode optical fiber and polarizer 2 and polarization The controller 3 is connected, and the polarization controller 3 is adjusted to obtain the required polarized light, and the ordinary single-mode optical fiber at the other end enters the spectrometer 5, and the spectrometer 5 is connected to the computer 6;

[0043] 1. Use a supercontinuum fiber l...

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Abstract

The invention relates to a fiber sensor, particularly relates to a multifunctional sensor with microstructure fiber surface plasma resonance and a preparation method thereof. The two sides of the photonic crystal fiber substrate of the fiber are provided with fan-shaped openings that surface of which are plated with gold films. Tips of the bottom ends of the fan-shaped openings are provided with silver nanowires. The core of the photonic crystal fiber substrate is provided with a magnetic fluid, and the outer side of the core is provided with a cladding air hole. The preparation method comprises the steps of: polishing the fan-shaped openings on the photonic crystal fiber; filling the silver nanowires; uniformly plating the gold films on the surface of the fan-shaped openings; pressing themagnetic fluid into the photonic crystal fiber from a small tube; and coupling and splicing the two ends of the common single mode fiber and the photonic crystal fiber through the self-calibrating function of the a fiber fusion splicer. The sensor of the invention can achieve the analysis and detection of the external magnetic field intensity, the refractive index of the to-be-measured liquid andthe external temperature in one time, therefore, the technical defects that the conventional detection technology is complex in operation, low in detection sensitivity and non-real time online detection are overcome.

Description

Technical field: [0001] The invention relates to an optical fiber sensor, in particular to a microstructure optical fiber surface plasmon resonance multifunctional sensor and a preparation method thereof. Background technique: [0002] With the maturation of fiber optic sensing technology, the practical development of fiber optic sensors has become a hot spot and key to the development of the entire field. Compared with traditional sensors, fiber optic sensors have many incomparable advantages, including anti-electromagnetic interference, chemical corrosion resistance, small size, long-distance measurement capability, large-capacity multiplexing capability, distributed quasi-distributed sensing capability, etc. Wait. However, ordinary optical fiber sensors mainly use ordinary optical fibers as sensitive components, which have disadvantages such as large coupling loss, poor polarization retention, and easy cross-sensitivity. In order to solve these problems, researchers have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 汪发美刘超吕靖薇刘强刘伟杨琳孙宇丹吕婷婷付长凤刘睿骑
Owner 南通畅衡智能装备有限公司
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