Near-infrared band-based double-peak PCF concentration and stress double-parameter sensing system

A sensing system, near-infrared technology, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as poor manufacturing effect and limited spectrometer performance, and achieve increased stability and favorable polarization state Effects of maintaining and increasing birefringence and dispersion characteristics

Pending Publication Date: 2022-02-18
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

The above PCF-SPR sensor and the present invention are essentially different in the discrimination of the analyte state and the sensitivity calculation method, and the high-sensitivity sensor proposed at present is also limited by the performance of the spectrometer, so most of the PCF-SPR sensors currently only exist in Simulation theory, actual manufacturing effect is poor

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  • Near-infrared band-based double-peak PCF concentration and stress double-parameter sensing system
  • Near-infrared band-based double-peak PCF concentration and stress double-parameter sensing system
  • Near-infrared band-based double-peak PCF concentration and stress double-parameter sensing system

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Embodiment approach 1

[0042] The near-infrared band dual-coupled photonic crystal fiber refractive index sensing method and measurement system detect seawater concentration and stress; the sensing unit is placed in seawater, and the concentration and stress of seawater affect the refractive index of the sensing unit, based on the principle of surface plasmon resonance , the device will appear two resonance loss peaks, through the distance Δλ between the two loss peaks peak And formula (2), (3), (4) calculation, can calculate the stress and concentration of seawater, finally displayed on the computer.

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Abstract

The invention provides a near-infrared band-based double-peak PCF concentration and stress double-parameter sensing system. The system comprises a light source, a single-mode fiber, a sensing unit, a spectrum analyzer, a photoelectric converter, a signal processing module and a computer. Based on the principle of surface plasma resonance, the concentration and stress are detected through the distance between two formants of the photonic crystal fiber with a special structure, and the result is displayed in the computer. The traditional wavelength sensitivity calculation method is replaced with the double-peak sensitivity formula, the novel sensing device adopts a double-peak sensitivity sensing method, and the novel sensing device has the advantages of being high in sensitivity, flexible in design, compact in structure, high in stability and the like and has higher value in practical use such as biochemical analyte detection and water pollution monitoring.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a dual-parameter sensing system based on near-infrared band bimodal PCF concentration and stress. Background technique [0002] Surface plasmon resonance (SPR) exists between metal and medium (or air), and uses total reflection evanescent waves to excite surface plasmon polaritons (SPP); SPR sensing technology has high sensitivity, no background interference, The characteristics of sample label-free, no need for further purification, and real-time rapid detection have become a multifunctional tool for monitoring the refractive index of analytes, filtering light of specific frequencies, and detecting the formation of nano-biofilms. In recent years, the concept of SPR sensors has been proposed. Photonic crystal fibers are characterized by their design flexibility, so that dispersion, birefringence, nonlinearity, etc. can be tailored through different air ...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N21/359G01N21/552
CPCG01N21/359G01N21/553
Inventor沈涛王韶峰陈文建武煜航
OwnerHARBIN UNIV OF SCI & TECH