Spiral light microflow sensor

A helical, sensor technology, applied in the field of optical sensors, can solve the problems of the influence of the light signal used for spatial stability sensing, and the sensitivity needs to be further improved, and achieve a compact structure, good temperature stability and space stability, and convenient operation. Effect

Active Publication Date: 2017-05-24
JINAN UNIVERSITY
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  • Abstract
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Problems solved by technology

However, the sensitivity of this scheme needs to be further improved, and the resonance excitation efficiency depends on the distance between the micro-nano fiber and the microfluidic channel, and its spatial stability has a great influence on the optical signal for sensing.

Method used

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  • Spiral light microflow sensor

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Embodiment

[0024] figure 1 It is a structural schematic diagram of a spiral optical microflow sensor disclosed by the present invention, such as figure 1 As shown, a spiral optical microfluidic sensor, the optical fiber and the quartz capillary are respectively removed from the coating layer and then melted to form a micro-nano optical fiber and a micro-nano quartz capillary with a certain size, and the micro-nano optical fiber is wound on the micro-nano quartz Capillary, a periodic structure formed.

[0025] The structure of the micro-nano quartz capillary includes a first quartz capillary end zone 1, a second quartz capillary end zone 5, a first micro-nano quartz capillary cone zone 2, a second micro-nano quartz capillary cone zone 4 and a micro-nano quartz capillary uniform zone 3 ,

[0026] The structure of the micro-nano fiber includes a first fiber end region 6, a second fiber end region 10, a first micro-nano fiber taper region 7, a second micro-nano fiber taper region 9 and a m...

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Abstract

The invention discloses a spiral light microflow sensor which is specially used for sensing measurement of a microfluid. The sensor is characterized in that a micro-nano fiber is wound around an annular microflow channel to form a uniform spiral periodic structure; resonant coupling between the micro-nano fiber and equidirectional microflow wave guide is stimulated by utilizing a periodic effect of an evanescent field; and an obvious resonant peak can be observed in a transmitted spectrum of an output end of the micro-nano fiber. When a microflow component is changed, an effective refractive index of the microflow wave guide is changed and the resonant wavelength generates drift, so that the change of the microflow component is sensed by monitoring the resonant wavelength. The fiber and a quartz capillary respectively form a complete light signal channel and a microflow channel, so that high-sensitivity and low-concentration rapid detection on biological, medical, chemical and other parameters can be realized; the stability is high; the cost is low; and operation is simple.

Description

technical field [0001] The invention relates to the technical field of optical sensors, in particular to a spiral optical microflow sensor. Background technique [0002] Optical microfluidic technology is a new technology produced by interdisciplinary integration of microfluidic technology and photonics. It is an important way to realize integrated and compact new light sources, tunable photonic devices and label-free biochemical sensors in the future. The design idea of ​​the optical microfluidic sensor is to consider how to structure the microfluidic entry and exit channels when designing the optical sensing structure, integrate the optical structure with the microfluidic channel to form a platform for the interaction between the optical signal and the microfluidic, and realize the microfluidic sensor. Measurement of changes in stream biochemical composition. The optical microfluidic sensor combines the advantages of small microfluidic channel structure size, low sample c...

Claims

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Application Information

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IPC IPC(8): G01N21/45B01L3/00
CPCB01L3/5027G01N21/45G01N2021/458
Inventor 金龙梁丽丽关柏鸥
Owner JINAN UNIVERSITY
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