Design and Implementation of Distributed Ultra-High Temperature Sensing System With a Single Crystal Fiber

Journal Article · Mon Oct 08 20:00:00 EDT 2018 · Journal of Lightwave Technology

DOI: https://doi.org/10.1109/jlt.2018.2874395 · OSTI ID:1509709

Liu, Bo  ^[1]; Buric, Michael P. ^[2]; Chorpening, Benjamin T. ^[2]; Yu, Zhihao  ^[1]; Homa, Daniel S. ^[1]; Pickrell, Gary R. ^[1]; Wang, Anbo ^[1]

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1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
2. National Energy Technology Lab. (NETL), Morgantown, WV (United States)

Modern high-temperature processes, such as fossil energy production, nuclear reactors, and chemical reactors lack robust, distributed sensing systems to map temperatures in these high-value harsh-environment systems. Regular silica-fiber-based distributed temperature sensing systems usually only operate at temperatures below about 800 °C. In this paper, we present the design, implementation, and testing of a distributed ultra-high temperature sensing system using Raman scattering intensity, which operates from room temperature to above 1400 °C. Consideration is given to the impacts of thermal radiation, fluorescence, and the multimode nature of unclad single-crystal fiber to optimize the system. Results from picosecond and sub-nanosecond lasers were compared. Measurements were taken with a ~2 m sapphire optical fiber, which represents the longest commercially available length. Here, a spatial resolution of 12.4 cm and position standard deviation of 0.28 mm were achieved up to the maximum testing temperature of 1400 °C, which is a new record for distributed temperature sensing systems.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
• Sponsoring Organization: FE; USDOE
• OSTI ID: 1509709
• Report Number(s): NETL-PUB-22326
• Journal Information: Journal of Lightwave Technology, Journal Name: Journal of Lightwave Technology Journal Issue: 23 Vol. 36; ISSN 0733-8724
• Publisher: IEEECopyright Statement
• Country of Publication: United States
• Language: English