5 December 2005 Temperature-independent fiber Bragg grating liquid-level sensor based on reflection optical power detection
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Proceedings Volume 6019, Passive Components and Fiber-based Devices II; 60191W (2005) https://doi.org/10.1117/12.637060
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China
Abstract
Design and construction of temperature-insensitive fiber Bragg grating (FBG) liquid level sensor based on bending cantilever beam (BCB) is proposed and demonstrated. The BCB induces spatially gradient strain on the unique sensing FBG, resulting in a Bragg bandwidth modulation. The broadening of FBG spectrum bandwidth and the reflected optical power are corresponded to liquid level changes, insensitive to spatially uniform temperature variations. In the liquid-level range of 500 mm and temperature change from 20oC to 80oC, the liquid level measurement fluctuates less than 2% without any temperature compensation. By a pin-photodiode (PD) optical power detecting, the liquid-level sensor avoids expensive and complex demodulation techniques and potentially costs low.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tuan Guo, Tuan Guo, Qida Zhao, Qida Zhao, Lifang Xue, Lifang Xue, Guiling Huang, Guiling Huang, Shiyu Gao, Shiyu Gao, Yan Yu, Yan Yu, Luming Zhao, Luming Zhao, Lihui Liu, Lihui Liu, } "Temperature-independent fiber Bragg grating liquid-level sensor based on reflection optical power detection", Proc. SPIE 6019, Passive Components and Fiber-based Devices II, 60191W (5 December 2005); doi: 10.1117/12.637060; https://doi.org/10.1117/12.637060
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