Manufacturing method of metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance)

A technology of liquid sensor and bimodal resonance, which is applied in the field of liquid sensor manufacturing to achieve the effect of long-distance telemetry, high performance-price ratio, and excellent performance

Inactive Publication Date: 2013-01-23
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

However, the research on the liquid refractive index (or concentration) sensing of metal-coated double-peak resonant long-period fiber gratings based on the SPR effect has not been reported so far.

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  • Manufacturing method of metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance)
  • Manufacturing method of metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance)
  • Manufacturing method of metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance)

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Embodiment Construction

[0028] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and all similar methods and similar changes of the present invention should be included in the protection scope of the present invention.

[0029] In order to maximize the change of the double peak spacing in the transmission spectrum of the metal-coated long-period fiber grating based on the SPR effect, it is necessary to select an appropriate grating period and metal film thickness to improve the sensor’s sensitivity to the liquid’s refractive index (or concentration). Monitor sensitivity. Therefore, there is a need for a novel method for manufacturing a metal-coated long-period fiber grating sensor. Compared with the traditional conductivity liquid sensor, the fiber grating liquid sensor has the characteristics of anti-electromagnetic interference, large dynamic r...

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Abstract

The invention discloses a manufacturing method of a metal film plated double-humped resonance liquid sensor based on SPR (Surface Plasmon Resonance), which comprises the steps of: (1) engraving a double-humped long-cycle fiber grating; (2) determining the plating thickness of a metal film; (3) plating the metal film on a cladding layer of the fiber grating; (4) manufacturing a sensor; and (5) detecting double-hump signals. The invention provides a manufacturing method of a miniaturized, high integrated and high-sensitive film plated fiber grating liquid sensor capable of remotely measuring, and the SPR effect at the interface of the metal film and a liquid medium and the double-humped resonance effect of the fiber grating are effectively utilized. The sensor manufactured by using the method has high sensitivity on a detected liquid and has a measurement resolution up to 10<-7> on the liquid refractive index. Due to the integration of the advantages of the SPR effect, the double-humpedresonance effect and fiber grating sensing, the manufacturing method can be widely applied to manufacturing optical chemical sensors.

Description

technical field [0001] The invention relates to a manufacturing method of a liquid sensor, in particular to a manufacturing method of a liquid sensor based on an SPR metal-coated double-peak resonant long-period optical fiber grating. Background technique [0002] Since the surface plasmon resonance (SPR) technology was first used in the field of chemical sensor research in 1982, SPR sensors have gradually become a research hotspot in the international sensor field. Prism, grating and waveguide SPR sensors emerged and have been widely used. In particular, optical fiber SPR sensors have the advantages of small size, simple operation, and can realize online real-time long-distance detection and monitoring. [0003] Long-period fiber grating (long-period fiber grating, LPFG) is a photo-induced fiber core refractive index change fiber device. Compared with short-period fiber gratings (i.e. Bragg fiber gratings), LPFGs are particularly sensitive to changes in the refractive ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/41
Inventor 顾铮先
Owner UNIV OF SHANGHAI FOR SCI & TECH
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