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- W4376607872 abstract "A simple and unique scheme of high-sensitive fiber Bragg grating (FBG) interrogation system based on microwave signal measurement utilizing the concept of microwave photonics and nonlinear four-wave mixing (FWM) is proposed. The concept of FWM process is combined with microwave photonics to enhance the sensitivity of FBG sensor. The strain-induced wavelength shift of the sensing FBG is translated to a higher wavelength shift of the corresponding higher order FWM signals on either side of FBG sensor wavelength in opposite directions. Thus, the wavelength separation between the FWM signals increases with a small increase in strain. Utilizing the FWM effect and microwave photonics technique, the microwave phase difference is altered, which is ultimately converted to a significant change in RF intensity. A novel mathematical relationship relating FWM, applied strain, and the microwave power of the proposed scheme is established. A high strain sensitivity of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$36.52 ~mu text{V}/mu varepsilon $ </tex-math></inline-formula> ( <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$26.67 ~mu text{W}/mu varepsilon {)}$ </tex-math></inline-formula> is attained using the proposed FWM and microwave photonics technique against the initial sensitivity of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$4.9 ~mu text{V}/mu varepsilon $ </tex-math></inline-formula> ( <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$0.48 ~mu text{W}/mu varepsilon {)}$ </tex-math></inline-formula> using only microwave photonics technique. The proposed scheme automatically compensates the temperature variations and eliminates the requirement of high dispersive component to enhance the sensitivity." @default.
- W4376607872 created "2023-05-17" @default.
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- W4376607872 date "2023-07-01" @default.
- W4376607872 modified "2023-09-24" @default.
- W4376607872 title "Augmentation of Sensitivity of FBG Sensor Using Microwave Photonics and Nonlinear Effect" @default.
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- W4376607872 doi "https://doi.org/10.1109/jsen.2023.3274965" @default.
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