Mr. Jordan Athas Profile

Jordan Athas

at Univ. of Pittsburgh

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Proceedings Article | 27 May 2022 Presentation + Paper

Low-cost plasmonic fiber probe and wireless interrogation for electric power equipment temperature sensing

Yang-Duan Su, Jordan Athas, Nageswara Lalam, Brandon Grainger, Paul Ohodnicki

Proceedings Volume 12105, 121050A (2022) https://doi.org/10.1117/12.2617139

KEYWORDS: Fiber optics sensors, Sensors, Nanocomposites, Temperature sensors

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Nanocomposite thin-film coated fiber optic sensors can be a promising solution to real-time temperature monitoring of electrical assets and imminent failure detection owing to minimal electrical connections and immunity to electromagnetic interference. However, cost of optical interrogation hardware has been a major roadblock for commercialization of fiber optic sensors. Here, we present a novel and simplified design of a fiber optic temperature sensor based on localized surface plasmon resonance (LSPR) response, a low-cost photodiode transimpedance-amplifier (TIA) circuit and collimated LED for monitoring applications where the cost of deployment is a critical consideration. The TIA circuit is designed to capture temperature-induced optical transmission and reflection responses by photocurrent-converted voltage variations communicated through Serial Peripheral Interface (SPI) wireless communication protocols. Wirelessly interrogable optical fiber sensors can therefore be potentially integrated in a wide range of assets such as grid-scale energy storage and medium or high voltage electric power conversion systems. To further minimize system complexity as compared to transmissionbased sensors demonstrated previously, a major emphasis is on a new reflection-based fiber sensor probe. This is also simulated in an optical waveguide physics-based model with Au-incorporated dielectric matrix oxides deposited on the fiber tip. Preliminary results of modeling the temperature response using end-coated reflection fiber probes are discussed.

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