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Micro-structure sensor based on femtosecond inscribing optical fiber F-P cavity cascading FBG

A F-P, sensor technology, applied in the direction of converting sensor output, using optical devices to transmit sensing components, instruments, etc., to achieve high stability, compact and simple cascade structure

Inactive Publication Date: 2018-06-22
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

[0004] However, most of the current research is to connect optical fibers with different structures in a cascaded manner to form an interference structure to achieve dual-parameter measurement. However, there are relatively few studies on the use of femtosecond laser direct writing to fabricate intrinsic F-P interferometric sensors to achieve dual-parameter simultaneous measurement.

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  • Micro-structure sensor based on femtosecond inscribing optical fiber F-P cavity cascading FBG
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  • Micro-structure sensor based on femtosecond inscribing optical fiber F-P cavity cascading FBG

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Embodiment Construction

[0060] By referring to exemplary embodiments, the objects and functions of the present invention and the methods for achieving these objects and functions will be clarified. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in different forms. The essence of the description is only to help those skilled in the relevant art to comprehensively understand the specific details of the present invention.

[0061] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference signs represent the same or similar parts or the same or similar steps.

[0062] The present invention provides a microstructure sensor based on femtosecond writing fiber FP cavity cascade FBG, which includes a first single-mode fiber and a second single-mode fiber, the first single-mode includes an FP cavity structure, and the second single-mode The optical fiber includes an apod...

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Abstract

The invention provides a micro-structure sensor based on femtosecond inscribing optical fiber F-P cavity cascading FBG and a preparation method of the micro-structure sensor. The cascading structure provided by the invention is compact and simple, and is high in stability, an optical fiber F-P cavity is processed by femtosecond laser direct writing, and is in cascading with apodization FBG processed by excimer laser on an SM-28 single-mode optical fiber, measurement and demodulation are carried out by different filtering and sensitivities of two optical structures, and double-parameter sensingis realized integrally.

Description

Technical field [0001] The invention relates to the field of optical fiber sensor devices, in particular to a microstructure sensor based on femtosecond writing optical fiber F-P cavity cascade FBG. Background technique [0002] Since the 1970s, optical fiber sensor devices have the advantages of light weight, small size, corrosion resistance, electromagnetic interference resistance and high sensitivity. They have been widely used in core sensing fields such as physics, chemistry, biology, medicine, aviation, and aerospace. The measurement of temperature, strain, refractive index, relative humidity and pressure by sensors has become one of the research hotspots. Due to the widespread existence of cross-sensitivity problems in practical applications, the research on dual-parameter sensors has received extensive attention in recent years. Among them, strain and temperature are two important types of monitoring objects, and are also the technical basis for other physical quantity se...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353G01D21/02
CPCG01D5/35316G01D21/02
Inventor 祝连庆张雯董明利娄小平李红何巍陈少华
Owner BEIJING INFORMATION SCI & TECH UNIV
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