Journal
OPTICS LETTERS
Volume 44, Issue 22, Pages 5570-5573Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.44.005570
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Funding
- National Natural Science Foundation of China [61405166, 61775185]
- Sichuan Province Science and Technology Support Program [2018HH0002]
- Higher Education Discipline Innovation Project [B18045]
- Ministerio de Economia y Competitividad [DIMENSION TEC2017 88029-R]
- Horizon 2020 Framework Programme [722509]
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This Letter presents a simple temperature-insensitive optical tilt sensor based on a single eccentric-core fiber Bragg grating (ECFBG). By partly inserting an ECFBG into a ceramic ferrule, the reflection spectrum of the ECFBG splits into two peaks as a result of the applied tilt angle. The magnitude and direction of inclination in one dimension can be determined by monitoring the wavelength separation between both peaks, which is inherently insensitive to temperature. The proposed tilt sensor has a good linear response within a wide dynamic range of +/- 45 degrees, with a sensitivity of 0.012 nm/degrees, with a resolution of 0.83 degrees, and with an accuracy of 0.41 degrees. Being free from any inherent mechanical joint/friction, along with the advantages of a compact structure, good repeatability, and low cost, the proposed sensor is highly suitable for practical engineering applications. (C) 2019 Optical Society of America
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