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A double-parameter spr sensor with double-sided grinding of multi-clad optical fiber

A multi-clad, sensor technology, applied in the fields of optical network and optical device, optical fiber communication, biology, food sanitation and environmental detection, can solve the problems of complex structure, length increase of optical fiber sensor, etc., achieve small size, simple structure and low cost low effect

Inactive Publication Date: 2019-03-29
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Optical fiber-based SPR sensor is a high-precision, new type of optical fiber sensor, which is often used in external refractive index sensing, ultra-thin dielectric layer biosensing or temperature sensing, but the usual SPR optical fiber sensor is only for a single variable. detection, and it is necessary to realize dual-parameter detection by means of fiber grating or SPR optical fiber cascading of multiple coated metal materials, which increases the length of the optical fiber sensor and complicates the structure, and the dual-parameter detection of a single SPR structure has not yet been realized.

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  • A double-parameter spr sensor with double-sided grinding of multi-clad optical fiber

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Embodiment approach 1

[0013] A multi-clad optical fiber double-sided grinding type SPR dual-parameter sensor The triple-clad optical fiber with a length of 0.75 cm is the carrier for sensing and light transmission, and the remaining radius of grinding is 5 microns. The two planes are perpendicular to each other. A first layer of metal material 4-1 and a second layer of metal material 4-2 are coated on the X-direction grinding surface 3-1 of the multi-clad optical fiber, and a Y-direction grinding surface 3-2 is coated with a metal material 4-3. Among them, the double-side polished multi-clad optical fiber 2 is manufactured according to requirements, the radius of the core layer 1 is 5 microns, and the refractive index of each layer is distributed in steps of high-low-high-low. Due to the difference in the coating material of the grinding plane perpendicular to each other in the double-sided grinding multi-clad fiber 2, the corresponding SPR loss spectrum has different sensitivity to the external ref...

Embodiment approach 2

[0015] A multi-clad optical fiber double-sided grinding type SPR dual-parameter sensor The triple-clad optical fiber with a length of 1 cm is the carrier for sensing and light transmission, and the remaining radius of grinding is 5 microns. The two planes are perpendicular to each other. A first layer of metal material 4-1 and a second layer of metal material 4-2 are coated on the X-direction grinding surface 3-1 of the multi-clad optical fiber, and a Y-direction grinding surface 3-2 is coated with a metal material 4-3. Among them, the double-side polished multi-clad optical fiber 2 is manufactured according to requirements, the radius of the core layer 1 is 5 microns, and the refractive index of each layer is distributed in steps of high-low-high-low. Due to the difference in the coating material of the grinding plane perpendicular to each other in the double-sided grinding multi-clad fiber 2, the corresponding SPR loss spectrum has different sensitivity to the external refrac...

Embodiment approach 3

[0017] A multi-clad optical fiber double-sided grinding type SPR dual-parameter sensor The triple-clad optical fiber with a length of 1 cm is the carrier for sensing and light transmission, and the remaining radius of grinding is 5.5 microns. The two planes are perpendicular to each other. A first layer of metal material 4-1 and a second layer of metal material 4-2 are coated on the X-direction grinding surface 3-1 of the multi-clad optical fiber, and a Y-direction grinding surface 3-2 is coated with a metal material 4-3. Among them, the double-side polished multi-clad optical fiber 2 is manufactured according to requirements, the radius of the core layer 1 is 5 microns, and the refractive index of each layer is distributed in steps of high-low-high-low. Due to the difference in the coating material of the grinding plane perpendicular to each other in the double-sided grinding multi-clad fiber 2, the corresponding SPR loss spectrum has different sensitivity to the external refr...

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Abstract

The invention discloses a multi-clad SPR sensor, relates to a multi-clad fiber bilateral-grinding type SPR dual-parameter sensor, belongs to the field of optical fiber communication, optical network and optical devices, and is suitable for the field of application of a variety of sensors. The multi-clad fiber bilateral-grinding type SPR dual-parameter sensor solves a dual-parameter sensing problem in an existing SPR sensor, is flexible in structure, relatively small in size, light in mass, relatively simple and flexible in manufacturing process, and low in cost. A multi-clad bilateral-grinding-based SPR dual-parameter sensor is formed by coating an X-direction grinding surface (3-1) with a first layer of metal material (4-1) and a second layer of metal material (4-2) on, and coating a Y-direction grinding surface (3-2) with a metal material (4-3). Coating materials and other parameters of two planes are different, so that corresponding SPR loss spectra have different sensitivities to external environmental parameters, when an external environment changes, two loss spectra have different changes to achieve a dual sensing purpose.

Description

technical field [0001] The invention relates to a multi-clad optical fiber double-sided grinding type SPR dual-parameter sensor, which belongs to the fields of optical fiber communication, optical network and optical devices, and is suitable for the fields of biology, food hygiene, environment detection and the like. Background technique [0002] Surface Plasmon Resonance (SPR) is a phenomenon that occurs at the interface between a metal layer and a dielectric layer and is generated by electromagnetic wave coupling. SPR-based sensors can be divided into fiber optic SPR sensors and prism SPR sensors according to different carriers and structures. The prism-type SPR sensor is relatively large in size, poor in real-time performance and not suitable for remote detection, while the optical fiber transmission capacity is large, small in size, and has the possibility of remote monitoring. It has been applied in the field of sensing in the past ten years and has been widely recogniz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/552
CPCG01N21/553
Inventor 翁思俊裴丽王建帅刘超吴良英李月琴王一群
Owner BEIJING JIAOTONG UNIV