期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 36, 期 10, 页码 1952-1958出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2018.2797104
关键词
Fabry-Perot interferometer; concave-core photonic crystal fiber; fiber sensor
资金
- National Natural Science Foundation of China [61675055, 61575051]
- Shenzhen Municipal Science and Technology Plan Project [JCYJ20150529114045265, JSGG20150529153336124]
A high-sensitivity Fabry-Perot interferometer (FPI) strain sensor based on a concave-core photonic crystal fiber (CPCF) was proposed and demonstrated. The FPI was formed by directly splicing a CPCF to a standard single-mode fiber. The CPCF was fabricated by cleaving a high-numerical-aperture solid-core photonic crystal fiber under axial tension using a traditional fiber cleaver. An FPI strain sensor with a cavity length of 4.85 mu m and a strain sensitivity of 31.58 pm/mu epsilon was successfully produced. The sensor also demonstrated a low temperature sensitivity of 0.653 pm/degrees C, reducing the cross-sensitivity between tensile strain and temperature. The benefits of the proposed sensor include simple fabrication, high strain sensitivity, and low temperature cross-sensitivity, making it attractive for practical applications.
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