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Fabry-Perot sensor capable of simultaneously detecting double parameters and detection device

A Fa-Per sensor, dual-parameter technology, applied in the coupling of measurement devices, instruments, optical waveguides, etc., can solve problems such as the influence of detection sensitivity, and achieve the effect of easy fully programmed operation and easy integration

Active Publication Date: 2013-10-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Because the photonic crystal fiber must be used for fusion splicing with single-mode fiber, and there is a certain loss in the fusion splicing of photonic crystal fiber and single-mode fiber, which affects the detection sensitivity

Method used

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  • Fabry-Perot sensor capable of simultaneously detecting double parameters and detection device
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  • Fabry-Perot sensor capable of simultaneously detecting double parameters and detection device

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Embodiment Construction

[0016] Such as figure 1 As shown, in the present embodiment, a Fab sensor based on photonic crystal fiber micromachining, the sensor is welded by the first single-mode fiber 1, the photonic crystal fiber 2 and the second single-mode fiber 3 in sequence, and after fusion, passes through Femtosecond laser processing, excimer laser processing, or plasma beam etching are used to process two Fab cavities with different cavity lengths at the fusion joint. Wherein, the length of the photonic crystal fiber 2 is greater than 500 micrometers, so as to prevent crosstalk between two Fab cavities. The lengths of the first and the second Fapp cavity are respectively 40-100 microns, and the length difference between them is 10-20 microns.

[0017] figure 2 Shown is the measuring device that adopts the Fap sensor based on photonic crystal fiber micromachining of the present invention, it comprises the first broadband light source 6, spectrometer 7, the second broadband light source 8, the ...

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Abstract

The invention discloses a Fabry-Perot sensor capable of simultaneously detecting double parameters and a detection device. The Fabry-Perot sensor is formed by sequential butt fusion of three sections of optical fiber. A first section of optical fiber is monomode optical fiber. A second section of optical fiber is photonic crystal fiber. A third section of optical fiber is monomode optical fiber. After the three sections of optical fiber are sequentially welded, two Fabry-Perot cavities different in length are formed in two butt fusion positions through a micro-processing method. The length of the photonic crystal fiber is larger than 500 microns. Lengths of the two Fabry-Perot cavities are respectively 40-100 microns. The length of one Fabry-Perot cavity is 10-20 microns larger than the length of the other Fabry-Perot cavity. The detection device based on the Fabry-Perot sensor further comprises a first coupler, a second coupler, a first broadband light source, a second broadband light source and a spectrograph. The Fabry-Perot sensor overcomes the defect that loss exists in butt fusion of an existing photonic crystal fiber and an existing monomode optical fiber, has the advantages of being capable of simultaneously detecting double parameters and microminiaturized, being reduced in weight, being easy to integrate, and being capable of being operated in a complete sequencing mode.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a Fab sensor and a detection device capable of simultaneously detecting two parameters. Background technique [0002] In recent years, with the development of people's research on optical fiber sensors, optical fiber sensing has shown a trend of miniaturization, light weight, low energy consumption, and high resistance to harsh environments. Optical fiber sensors are widely used in aerospace, ships, dams, environmental monitoring, chemical and biological fields due to their outstanding advantages such as small size, anti-electromagnetic interference, and use in harsh environments. [0003] Photonic crystal fiber is also called microstructured fiber. As a new type of light-guiding medium, it has many excellent properties due to its microstructure, which provides an opportunity to solve many sensing problems, and thus becomes the focus of attention in the field of opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02G02B6/255
Inventor 夏历李来斌刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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