Simple temperature insensitive fiber Bragg grating based tilt sensor with enhanced tunability

Author name used in this publication: H. Y. Tam2011-2012 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

Temperature-insensitive optical tilt sensor based on a single eccentric-core fiber Bragg grating

[EN] 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 AmericaNational 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).Zheng, D.; Cai, Z.; Floris, I.; Madrigal-Madrigal, J.; Pan, W.; Zou, X.; Sales Maicas, S. (2019). Temperature-insensitive optical tilt sensor based on a single eccentric-core fiber Bragg grating. Optics Letters. 44(22):5570-5573. https://doi.org/10.1364/OL.44.005570S557055734422Lin, C. H., & Kuo, S. M. (2008). Micro-impedance inclinometer with wide-angle measuring capability and no damping effect. Sensors and Actuators A: Physical, 143(1), 113-119. doi:10.1016/j.sna.2007.08.021Qiang Zhang, Tao Zhu, Fengyang Yin, & Kin Seng Chiang. (2014). Temperature-Insensitive Real-Time Inclinometer Based on an Etched Fiber Bragg Grating. IEEE Photonics Technology Letters, 26(10), 1049-1052. doi:10.1109/lpt.2014.2313334Zhuang, Y., Chen, Y., Zhu, C., Gerald, R. E., & Huang, J. (2018). Probing changes in tilt angle with 20 nanoradian resolution using an extrinsic Fabry-Perot interferometer-based optical fiber inclinometer. Optics Express, 26(3), 2546. doi:10.1364/oe.26.002546Guan, B.-O., Tam, H.-Y., & Liu, S.-Y. (2004). Temperature-Independent Fiber Bragg Grating Tilt Sensor. IEEE Photonics Technology Letters, 16(1), 224-226. doi:10.1109/lpt.2003.820101Bao, H., Dong, X., Zhao, C., Shao, L.-Y., Chan, C. C., & Shum, P. (2010). Temperature-insensitive FBG tilt sensor with a large measurement range. Optics Communications, 283(6), 968-970. doi:10.1016/j.optcom.2009.11.014Xinyong Dong, Zhan, C., Kun Hu, Ping Shum, & Chi Chiu Chan. (2005). Temperature-insensitive tilt sensor with strain-chirped fiber Bragg gratings. IEEE Photonics Technology Letters, 17(11), 2394-2396. doi:10.1109/lpt.2005.857978Yang, R., Bao, H., Zhang, S., Ni, K., Zheng, Y., & Dong, X. (2015). Simultaneous Measurement of Tilt Angle and Temperature With Pendulum-Based Fiber Bragg Grating Sensor. IEEE Sensors Journal, 15(11), 6381-6384. doi:10.1109/jsen.2015.2458894Chen, H.-J., Wang, L., & Liu, W. F. (2008). Temperature-insensitive fiber Bragg grating tilt sensor. Applied Optics, 47(4), 556. doi:10.1364/ao.47.000556MacPherson, W. N., Flockhart, G. M. H., Maier, R. R. J., Barton, J. S., Jones, J. D. C., Zhao, D., … Bennion, I. (2004). Pitch and roll sensing using fibre Bragg gratings in multicore fibre. Measurement Science and Technology, 15(8), 1642-1646. doi:10.1088/0957-0233/15/8/036Zheng, D., Madrigal, J., Chen, H., Barrera, D., & Sales, S. (2017). Multicore fiber-Bragg-grating-based directional curvature sensor interrogated by a broadband source with a sinusoidal spectrum. Optics Letters, 42(18), 3710. doi:10.1364/ol.42.003710Zheng, D., Madrigal, J., Barrera, D., Sales, S., & Capmany, J. (2017). Microwave Photonic Filtering for Interrogating FBG-Based Multicore Fiber Curvature Sensor. IEEE Photonics Technology Letters, 29(20), 1707-1710. doi:10.1109/lpt.2017.2742579Kong, J., Ouyang, X., Zhou, A., Yu, H., & Yuan, L. (2016). Pure Directional Bending Measurement With a Fiber Bragg Grating at the Connection Joint of Eccentric-Core and Single-Mode Fibers. Journal of Lightwave Technology, 34(14), 3288-3292. doi:10.1109/jlt.2016.256554