Optical fiber fabry-perot strain sensor, sensing system and sensor manufacturing method

The invention relates to an optical fiber fabry-perot strain sensor comprising two optical fibers (1) and (2) which are fused to each other. One end, fused with the optical fiber (2), of the optical fiber (1) is provided with a round hole, and a non-intrinsic fabry-perot cavity is formed by the roun...

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Bibliographische Detailangaben
Hauptverfasser: DAI JINWEN, YANG YANGUANG, LI XUGUO, LUO SHUCHENG, MIN FU, LUO PEILIANG, RAN ZENGLING
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention relates to an optical fiber fabry-perot strain sensor comprising two optical fibers (1) and (2) which are fused to each other. One end, fused with the optical fiber (2), of the optical fiber (1) is provided with a round hole, and a non-intrinsic fabry-perot cavity is formed by the round hole and the single-mode optical fibers (1) and (2). The other end of the optical fiber (2) is flat and provided with a gallium arsenide coated film. Compared with existing optical fiber fabry-perot strain sensors, the optical fiber fabry-perot strain sensor and a sensing system thereof have the advantages that intrinsic absorption wave length of the gallium arsenide coated film is unaffected by external factors such as film stress and only related to temperature. The gallium arsenide coated film is fast in intrinsic absorption, resistant to high temperature and capable of meeting the requirement for real-time measuring of temperature under the condition of high temperature. Besides, the optical fiber fabry-perot