Side-core SPR refractive index sensing model based on pohotonic crystal fiber

A photonic crystal fiber, refractive index technology, applied in the directions of multi-core fiber, cladding fiber, optical waveguide light guide, etc., can solve the problem of incident light energy loss, etc., and achieve the effect of improving efficiency and precision, huge application value and high linearity

Inactive Publication Date: 2016-08-24
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

If the resonance of these two waves is considered in a photonic crystal fiber, the incident light energy will be absorbed and loss

Method used

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  • Side-core SPR refractive index sensing model based on pohotonic crystal fiber
  • Side-core SPR refractive index sensing model based on pohotonic crystal fiber
  • Side-core SPR refractive index sensing model based on pohotonic crystal fiber

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. see Figure 1 to Figure 3 , a side-core SPR sensing model based on photonic crystal fiber, its cross-section is circular, including substrate 1, core and cladding air hole 2, around the core is cladding air hole 2, characterized in that the The said fiber core is set as the right side fiber core 3 and the left side fiber core 6; The said right side fiber core 3 comprises a metal cylinder detection hole 4, the medium to be measured 5; The left side fiber core 6 is a solid base Material. The material of the base 1 and the left core 6 is silicon dioxide with a refractive index of 1.45. The cladding air holes 2 are periodically arranged in an equilateral triangle, the lattice constant (distance L between the centers of two adjacent air holes) is 2um, and the diameter Φ of the cladding air holes 2 is 1um. The right fiber core 3 is circular, the rad...

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Abstract

The invention discloses a side-core SPR refractive index sensing model based on a pohotonic crystal fiber. The cross section of the side-core SPR refractive index sensing model is circular; cladding air holes are formed around fiber cores; the fiber cores consist of a right fiber core and a left fiber core; the left fiber core is made of a solid substrate material; the right fiber core comprises metal column body detection holes and a medium layer which coats the surface of a metal column body and is to be detected. A side core SPR sensing structure of the pohotonic crystal fiber is adopted, and an excited SPP mold and a fiber core base mold are subjected to resonance coupling under a phase-position matching condition. Moreover, very high linearity is achieved within a certain range, the sensitivity is up to 21514 nm/RIU, the sensing efficiency and precision can be greatly improved, and great application values can be made for sensation of SPR_PCF.

Description

technical field [0001] The invention belongs to the field of photonic crystal fiber sensing, in particular relates to PCF_SPR sensing technology, in particular to a side core SPR (surface plasmon resonance) refractive index sensing model based on photonic crystal fiber. Background technique [0002] In 1992, P. St. J. Russell and others proposed a photonic crystal fiber (photonic crystal fiber, PCF) using a two-dimensional photonic crystal as the fiber cladding. Then J. C. Knight drew the world's first refractive index guided PCF in 1996. Then in 1998, J. C. Knight pulled the first photonic bandgap guided PCF. Photonic crystal fiber is also sometimes called micro-structured optical fiber (MOF). Now photonic crystal fiber mainly includes two types: one is similar to the traditional fiber, called the improved version of the total reflection type; the other is contrary to the previous fiber, the equivalent refractive index of its cladding is larger than that of the core, Kno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
CPCG02B6/02042G02B6/02314
Inventor 刘彬李军刘云凤
Owner NANCHANG HANGKONG UNIVERSITY
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