Micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor

A technology of Perot resonant cavity and micro-structured optical fiber, which is applied in the field of sensing technology devices, can solve the problems such as the limitation of the multiplexing number of optical Bragg gratings, and achieve the effect of high practical value, large multiplexing capacity, and accurate measurement

Active Publication Date: 2012-06-27
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

However, due to factors such as power and bandwidth, the multiplexing number of optical Bragg gratings is limited to a certain extent.

Method used

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  • Micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor
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  • Micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor

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Embodiment Construction

[0022] The invention is based on the Fabry-Perot resonance effect and the fiber Bragg grating sensing principle, combined with the frequency division multiplexing and wavelength division multiplexing technology to form a quasi-distributed sensor based on the microstructure fiber Fabry-Perot resonator as the sensing unit The sensor improves the multiplexing capacity of the sensing unit on a single optical fiber, and realizes the monitoring of the spatial field distribution of parameters along the optical fiber.

[0023] The quasi-distributed sensor based on the microstructure fiber Fabry-Perot resonator provided by the present invention has a sensing fiber composed of a plurality of microstructure fiber Fabry-Perot resonators integrated on a single-mode fiber Composed in series, a microstructure optical fiber Fabry-Perot resonant cavity is a sensing unit.

[0024] The present invention will be further described below in conjunction with the embodiments and accompanying drawings...

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Abstract

The invention relates to a micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor, which comprises a broadband light source (1), a fiber optic circular (2), a plurality of sensor units (3), a sensor-based optical fiber (4), an optical spectrum analyzer (5) and a data processor (6), wherein each sensor unit (3) is a micro-structure fiber optic Fabry-Perot cavity, and the sensor units are connected in series and are integrated on the sensor-based optical fiber (4); and three ports of the fiber optic ring device (2) are respectively connected with the broadband light source (1), the sensor-based optical fiber (4) integrating all sensor units, and the optical spectrum analyzer (5), and the optical spectrum analyzer (5) is connected with the data processor (6). The micro-structure fiber optic Fabry-Perot cavity quasi based quasi-distributed sensor has the advantages of large sensing capacity, simple structure, low cost, wide application prospect and the like.

Description

technical field [0001] The invention relates to a sensor technology device, in particular to a quasi-distributed sensor based on a microstructure optical fiber Fabry-Perot resonant cavity quasi. Background technique [0002] The principle of distributed optical fiber sensing system is to use optical fiber as sensing sensitive element and transmission signal medium at the same time to detect and perceive external signals at different positions along the optical fiber. In recent years, distributed optical fiber sensing technology has attracted more and more attention, has become a hotspot in international research, and has a wide range of applications in the industry. [0003] In the current distributed optical fiber sensing technology, the quasi-distributed fiber Bragg grating sensing technology can realize high-sensitivity sensing of external parameters such as stress, pressure and vibration, and has the advantages of small size, wide dynamic range and high reliability. , S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/26G01K11/32G01L1/24G01K11/3206
Inventor 孙琪真刘德明李晓磊张杰君梁瑞冰沃江海
Owner HUAZHONG UNIV OF SCI & TECH
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