Based on ti 3 c 2 High sensitivity lrspr fiber optic sensor and its preparation method

A fiber-optic sensing and high-sensitivity technology, applied in the field of sensors, can solve the problems of low sensitivity of LRSPR sensors, achieve a good electron transfer rate, improve sensitivity, and increase the scope of application

Active Publication Date: 2021-12-14
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to solve the problem of low sensitivity of the existing LRSPR sensor, the present invention proposes a Ti-based 3 C 2 High Sensitivity LRSPR Fiber Optic Sensor

Method used

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  • Based on ti <sub>3</sub> c <sub>2</sub> High sensitivity lrspr fiber optic sensor and its preparation method
  • Based on ti <sub>3</sub> c <sub>2</sub> High sensitivity lrspr fiber optic sensor and its preparation method
  • Based on ti <sub>3</sub> c <sub>2</sub> High sensitivity lrspr fiber optic sensor and its preparation method

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Embodiment 1

[0054] In this embodiment, a Ti-based 3 C 2 High-sensitivity LRSPR fiber optic sensor, and use this sensor to detect solutions with different refractive indices.

[0055] A Ti-based 3 C 2 The high-sensitivity LRSPR fiber optic sensor, its structure schematic diagram is as follows figure 2 shown, including Ti-based 3 C 2 High-sensitivity LRSPR optical fiber sensing unit E, light source A, spectrometer H;

[0056] A Ti-based 3 C 2 The high-sensitivity LRSPR optical fiber sensing unit comprises a single-mode optical fiber core 5 and a multimode optical fiber, the multimode optical fiber is divided into a first multimode optical fiber 101 and a second multimode optical fiber 102, one end of the first multimode optical fiber 101 and a single-mode optical fiber One end of the mode fiber core 5 is connected, the other end of the single-mode fiber core 5 is connected to one end of the second multimode fiber 102, and on the periphery of the single-mode fiber core 5, terbium (I...

Embodiment 2

[0077] A Ti-based 3 C 2 The high-sensitivity LRSPR optical fiber sensor, with embodiment 1.

[0078] A Ti-based 3 C 2 The preparation method of the high-sensitivity LRSPR optical fiber sensing unit, comprises the following steps:

[0079] Step 1: First take two multimode optical fibers with a length of 20 cm, respectively as the first multimode optical fiber 101 and the second multimode optical fiber 102, and remove 2-3 cm of one end of the first multimode optical fiber 101 and the second multimode optical fiber 102 respectively Then take a single-mode optical fiber with a length of 2 cm and remove the cladding to obtain a single-mode optical fiber core with a refractive index of 1.4660 and a core diameter of 8 μm. Then, the ends of the two multimode optical fibers from which the coating has been removed are fused to the cores of the single-mode optical fibers respectively.

[0080] Step 2: Coating a layer of 150nm terbium(III) fluorine-containing complex matching layer on ...

Embodiment 3

[0091] A Ti-based 3 C 2 The high-sensitivity LRSPR optical fiber sensor of the present invention is the same as embodiment 1, except that the thickness of each layer is different, and the metal layer is a silver film.

[0092] A Ti-based 3 C 2 The preparation method of the high-sensitivity LRSPR optical fiber sensing unit, comprises the following steps:

[0093] Step 1: First take two multimode optical fibers with a length of 20 cm, respectively as the first multimode optical fiber 101 and the second multimode optical fiber 102, and remove 2-3 cm of one end of the first multimode optical fiber 101 and the second multimode optical fiber 102 respectively Then take a single-mode optical fiber with a length of 2 cm and remove the cladding to obtain a single-mode optical fiber core with a refractive index of 1.4660 and a core diameter of 10 μm. Then, the ends of the two multimode optical fibers from which the coating has been removed are fused to the cores of the single-mode op...

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Abstract

A Ti-based 3 C 2 A high-sensitivity LRSPR optical fiber sensor and a preparation method thereof belong to the technical field of sensors. Ti-based 3 C 2 The high-sensitivity LRSPR fiber optic sensor consists of Ti-based 3 C 2 High-sensitivity LRSPR fiber optic sensing unit, light source and spectrometer; based on Ti 3 C 2 The high-sensitivity LRSPR optical fiber sensing unit consists of a single-mode fiber core and a multimode fiber connected at both ends, and a matching layer, a metal layer and a Ti layer are arranged outside the single-mode fiber core. 3 C 2 Floor. Among them, the matching layer is coated on the outer layer of the single-mode fiber core by pulling coating, and the metal film is coated on the outside of the matching layer by magnetron sputtering. Ti 3 C 2 The layer is coated on the outside of the metal layer by electrostatic adsorption. This method utilizes Ti 3 C 2 Good optical properties greatly improve the sensitivity of fiber optic sensors and greatly increase the scope of application of biosensing.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to LRSPR sensors, especially to Ti-based 3 C 2 High sensitivity LRSPR fiber optic sensor. Background technique [0002] Surface plasmon resonance (SPR) is a special physical phenomenon that occurs on the surface of metals and measured substances. When incident light of a certain wavelength hits the metal thin film, the light wave will interact with the metal surface. The plasma waves resonate to produce the SPR effect and form resonance troughs. Surface plasmon resonance is very sensitive to the change of the refractive index of the measured substance attached to the metal surface. Therefore, by measuring the change of the SPR resonance trough, the small change of the refractive index of the dielectric can be detected, which can be widely used in biological and chemical sensors. field. [0003] Although SPR sensors have been widely studied and applied, higher sensitivity has alw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/552G01N21/41C03C25/105C23C14/35C23C14/18
CPCG01N21/554G01N21/41C03C25/105C23C14/35C23C14/185
Inventor 刘聪王琦李波
Owner NORTHEASTERN UNIV LIAONING
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