Senor device based on fiber miniature Fabry-Perot cavity

A sensor device, Perot cavity technology, applied in the direction of converting sensor output, using optical devices to transmit sensing components, measuring devices, etc., can solve the problems of complex grating writing process, structural instability, and complicated production, and achieve measurement The effect of large measuring range, simple production and high sensitivity

CN106052727APending Publication Date: 2016-10-26CHINA JILIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-10-26

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Abstract

The present invention provides a senor device based on a fiber miniature Fabry-Perot cavity. The device comprises a broadband light source, a circulator, a sensing head and a spectrum analyzer, the sensing head is composed of corrosion multi-mode fiber, microballoon and coating glue, and the coating glue is ultraviolet glue or high-temperature glue. The a multi-mode fiber end face is subjected to corrosion to obtain a taper chamber, a microballoon is inserted into the taper chamber of the corrosion multi-mode fiber, the taper chamber is sealed by using the coating glue which has one part penetrating into the taper chamber, and the microballoon and the coating glue end face form a Fabry-Perot cavity. The circulator receives light from the broadband light source and transmits the light to the sensing head, the sensing head reflects the light to the circulator, and the light is transmitted to the spectrum analyzer through the circulator to form a similar Fabry-Perot interferometer for measuring the wavelength drift of the reflection spectral signature and calculate the values of the measured enviromental parameters. The structure is compact, the manufacturing is simple and the cost is low.
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Description

technical field

[0001] The invention provides a sensor device based on an optical fiber miniature Fabry-Perot cavity, which belongs to the technical field of optical fiber sensing. Background technique

[0002] Compared with traditional sensors, optical fiber sensors have extremely high sensitivity and resolution, wide frequency band range, large dynamic range, and no electromagnetic field interference. It has been practically applied in medical and other scientific research fields. The development trend of sensors is sensitive, precise, adaptable, compact and intelligent. Among many fiber optic sensors, fiber optic sensors based on Fabry-Perot (F-P) cavity have developed rapidly and become an important branch of fiber optic sensor research. They are widely used in strain, stress, temperature, pressure, deformation, and vibration in structures. It can also be used for continuous real-time safety detection of physical quantities such as displacement and displacement, and ca...

Examples

Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment example, the present invention will be further described:

[0020] figure 1 Shown is a schematic diagram of an implementation and application system of the present invention, including a broadband light source 1 , a circulator 2 , a sensor head 3 , and a spectrum analyzer 4 . The connection method is as follows: the circulator 2 has three interface ports, namely: the light source inlet port, the light source outlet port, and the feedback port. The inlet port is connected to the broadband light source 1 , the outlet port is connected to the connecting sensor head 3 , and the feedback port is connected to the spectrum analyzer 4 .

[0021] figure 2 Shown is a schematic structural view of the ultraviolet glue-type sensing head 3 of the present invention, the sensing head 3 is composed of corroded multimode optical fibers 5, microspheres 6, and ultraviolet glue 7a, and the corroded multimode optical fibers 5 i...