Abstract
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 μ m and a strain sensitivity of 31.58 pm/μϵ was successfully produced. The sensor also demonstrated a low temperature sensitivity of 0.653 pm/°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.
| Original language | English |
|---|---|
| Article number | 8267257 |
| Pages (from-to) | 1952-1958 |
| Number of pages | 7 |
| Journal | Journal of Lightwave Technology |
| Volume | 36 |
| Issue number | 10 |
| DOIs | |
| State | Published - 15 May 2018 |
| Externally published | Yes |
Keywords
- Fabry-Perot interferometer
- concave-core photonic crystal fiber
- fiber sensor
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