Tapering area micropore structure based single mode glass optical fiber liquid refractive index sensor

A technology of liquid refractive index and glass optical fiber, which is applied in the measurement of phase influence characteristics, etc., can solve the problems that limit the practical application of tapered optical fiber sensor to the measurement sensitivity of liquid refractive index, and the optical fiber is easy to break, so as to improve the measurement sensitivity, enhance the mechanical strength, The effect of high measurement sensitivity
CN103439293AInactive Publication Date: 2013-12-11JILIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2013-12-11
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention belongs to the technical field of optical fiber sensing, and particularly relates to a glass optical fiber liquid refractive index sensing device based on a tapering area micropore structure. The glass optical fiber liquid refractive index sensing device structurally comprises a light source module (1), an optical fiber sensing probe (2), a photoelectric detector (3) and a control and processing circuit (4), wherein the optical fiber sensing probe (2) is a columnar sealing micropore which transversely penetrates through an optical fiber and is formed in the isosceles area of a tapering single mode fiber. Light emitted from a light source passes through the optical fiber sensing probe and carries the refractive index information of the liquid around the optical fiber sensing probe (2), the refractive index information is converted into an electrical signal via the detection of the photoelectric detector, and the refractive index of to-be-detected liquid can be obtained by delivering the electrical signal to the control and processing circuit (4) for processing. According to the invention, the tapering optical fiber is drawn through the conventional process, and the tapering micropore is processed by adopting femtosecond laser; compared with the traditional tapering optical fiber sensor, the glass optical fiber liquid refractive index sensing device has the advantages of high mechanical strength, high measuring sensitivity, easiness in processing and the like.
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Description

technical field

[0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a glass optical fiber liquid refractive index sensing device based on a micropore structure in a cone region. Background technique

[0002] With the development of science and technology, the measurement of liquid refractive index is of great significance to many fields, such as the measurement of solution concentration in chemistry, real-time monitoring of bacterial growth in biochemistry, and water quality inspection in environmental monitoring. Measurements, even in the beverage industry require detection of the refractive index of liquids.

[0003] Due to its light weight, small loss of optical signal, and large transmission capacity, optical fiber has been widely used in the measurement of liquid refractive index. The optical fiber sensing technologies for liquid refractive index measurement mainly include fiber grating sensors, fiber coating senso...

Claims

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