A novel all-fiber micro-displacement sensor based on long period grating and tip structure
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Abstract:
A novel high sensitivity all-fiber micro-displacement sensor is proposed and experimentally demonstrated. This sensor consists of a long period fiber gating and a fiber tip, which is achieved only by a commercial arc discharge fusion splicer, and thus possesses a lower cost. The wavelength sensitivity of the proposed sensor could be up to 934 pm/μm, which is four times higher than that of the long period fiber grating (LPFG) with an air cavity structure. The intensity change sensitivity is ?1.973 dB/μm.
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This work has been supported by the National Natural Science Foundation of China （Nos.l1274181, 10974100, 10674075, 11004110, 11274182 and 11104149）, the Doctoral Scientific Fund Project of the Ministry of Education （No.20120031110033）, the Tianjin Key Program of Application Foundations and Future Technology Research Project （No.10JCZDJC24300）, and the Fundamental Research Funds for the Central Universities of China.
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