In-fiber microfluidic sensing device based on four-hole microstructure optical fiber integration

A technology of micro-structured optical fiber and sensor devices, which is applied in optical components, optical waveguide coupling, instruments, etc., can solve the problems of sensitivity limitation and interference, and achieve the effect of high sensitivity, simple manufacture and compact structure

Pending Publication Date: 2021-12-31
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

At present, most fiber optic sensors are used to detect external physical quantities, and the sensitivity will be limited due to the interference of the external environment.

Method used

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  • In-fiber microfluidic sensing device based on four-hole microstructure optical fiber integration
  • In-fiber microfluidic sensing device based on four-hole microstructure optical fiber integration
  • In-fiber microfluidic sensing device based on four-hole microstructure optical fiber integration

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Embodiment 1

[0021] This example uses an in-fiber microfluidic sensor device based on the integration of four-hole microstructured optical fibers to measure the refractive index of liquid. When the light of the supercontinuum light source enters the left open-hole capillary fiber through the input single-mode fiber, the high-order mode is excited, and the high-order mode and the core mode are simultaneously transmitted in the core and cladding of the four-hole microstructure fiber. The refractive index of the core and the cladding of the four-hole microstructure fiber is different, and the propagation constants of the high-order mode and the core fundamental mode in the fiber are different, so that different modes of light have different optical paths. Therefore, in the four-hole microstructure fiber fiber Light propagating between the core and cladding also has an optical path difference, resulting in a phase difference between the higher-order modes and the core fundamental mode. When th...

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Abstract

The invention discloses an in-fiber microfluidic sensing device based on four-hole microstructure optical fiber integration, and belongs to the technical field of optical fiber sensing. The device is composed of a super-continuum spectrum light source (1), a four-hole microstructure optical fiber microflow sensing unit (2), a spectrum analyzer (3), a microflow pump (4) and a waste liquid pool (5); wherein the four-hole microstructure optical fiber microflow sensing unit (2), a liquid inlet and a liquid outlet of a to-be-detected sample are formed by perforated capillary optical fibers (7) and (8) respectively and welded to the two sides of the four-hole microstructure optical fiber (10), and the liquid inlet and the liquid outlet are connected with the microflow pump (4) and the waste liquid pool (5) respectively. According to the sensor, the perforated capillary optical fiber is used as a liquid inlet/outlet and is combined with the microstructure optical fiber to realize detection of microfluid in the optical fiber, and a microfluidic system and optics are integrated, so that the sensor is more miniaturized, and the sensitivity is greatly improved. The device has potential application in the fields of environmental monitoring, biochemical detection and the like.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensors, and in particular relates to an in-fiber microfluidic sensor device based on four-hole microstructure optical fiber integration. Background technique [0002] Sensor technology is the cutting-edge technology of modern science and technology and one of the three pillars of modern information technology. Its level is one of the important symbols to measure the development level of a country's science and technology. The sensor industry is also recognized as a promising high-tech industry at home and abroad. It has attracted the attention of the world for its high technical content, good economic benefits, strong penetration ability, and broad market prospects. With the development of modern science and technology, the acquisition of information is becoming more and more important. Sensors are an important technical means for sensing, detecting, monitoring and transforming information...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/41G01N21/45G01N21/01G02B6/245G02B6/25G02B6/255
CPCG01N21/4133G01N21/45G01N21/01G02B6/245G02B6/25G02B6/255G02B6/2551G01N2021/458
Inventor 吴继旋李叶张诚白华江洋
Owner TIANJIN POLYTECHNIC UNIV
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