Single mode fiber with surface waveguide, SPR biosensor and preparation method thereof

A technology of surface waveguide and single-mode optical fiber, which is applied in the field of sensors, can solve the problems of physical structure damage of optical fiber SPR sensors, low efficiency of SPR effect, complicated preparation process, etc., and achieve the effect of low mechanical strength, simple manufacture and simple preparation process
CN109188601APending Publication Date: 2019-01-11SHENZHEN UNIV
4 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN UNIV
Publication Date
2019-01-11

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a single mode fiber with a surface waveguide, an SPR biosensor and a preparation method thereof. The single mode fiber comprises: a fiber core and a cladding layer, which constitute a total reflection condition, wherein the cladding layer covers the fiber core, the cladding layer contains the surface waveguide therein, the surface waveguide is close to the surface of the cladding layer, the surface waveguide is written by the femtosecond laser direct writing waveguide technology, the surface waveguide is used to generate a strong evanescent field for exciting an SPR effect without destroying a physical structure of the optical fiber, so that the single mode fiber has relatively high mechanical strength, since the single mode fiber contains the surface waveguide, thelight wave energy in the fiber core can be guided to the surface of the fiber to generate the strong evanescent field, the fabrication is simple, the excitation efficiency is high, further, the SPR biosensor comprising the above single mode fiber also avoids the problems that the physical structure is destroyed and the mechanical strength is low, and the single mode fiber disclosed by the invention also has the advantages of high efficiency of exciting the SPR effect and simple preparation process.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of sensors, in particular to a single-mode optical fiber with a surface waveguide, an SPR biosensor and a preparation method. Background technique

[0002] At present, there are a variety of common optical fiber surface plasmon resonance (Surface Plasmon Resonance, SPR) sensors on the market, such as micro-nano fiber-coupled SPR sensors, side-polished fiber-coupled SPR sensors, tilted fiber grating-coupled SPR sensors and Photonic crystal fiber-coupled SPR sensor. However, the above-mentioned SPR sensor has various problems. details as follows:

[0003] Among them, the micro-nano fiber-coupled SPR sensor stretches the multi-mode fiber or single-mode fiber to make it thinner. When the waveguide is thinner to a certain extent, a strong evanescent field will be generated on the surface, and a certain thickness of The metal layer, the evanescent field can effectively excite the plasmon to resonate and produce...

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