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Demodulating an acoustic signal stimulated by photo-thermal elastic energy conversion using quartz tuning forks

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Abstract

This work describes a quartz-tuning-fork enhanced photo-thermal spectroscopic (QEPTS) based gas sensors technique. A highly resonant quartz tuning fork with the capability for improved mechanical repetition has been used to boost the photo-thermal sensitivity for detecting in contrast to commonly used heat-sensitive components.The approach described in this study differs from typical QEPTS in that it uses two QTF to detect an acoustic wave generated by the first QTF as an outcome of vibrations brought on by the photo-thermoelastic action. By preventing the QTF from being exposed to laser radiation, this passive decoding by acoustic monitoring could reduce noise and improve detection capability. The development and verification of four distinct sensing combinations. The targeted gases are decided to be acetylene at a mass fraction of 1.95 percent. The numerical simulation step involves creating a simulation of the acoustic field created by the first QTF oscillating in an attempt to elucidate the modification tendency of noise and signal in the subsequnt QTF. In comparison to the conventional QEPTS, according to the limited data, the ‘Signal to Noise Ratio’ was increased by a factor of 1.37 as a result of this method. It is suggested that such technology be further enhanced.

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Acknowledgements

Authors are grateful to the Researchers Supporting Project Number (RSPD2023R955), King Saud University, Riyadh, Saudi Arabia.

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MT: Investigation, methodology, writing—review and editing. TMA: Conceptualization, formal analysis, writing—review and editing. RPG: Conceptualization, formal analysis, writing—original draft writing—review and editing RN: Conceptualization, writing—review and editing. GR: Writing—review and editing. YSU: Formal analysis, writing—review and editing. MZA: Formal analysis, writing—review and editing.

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Correspondence to M. Tamilselvi.

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Tamilselvi, M., Amirthalakshmi, T.M., Guru, R.P. et al. Demodulating an acoustic signal stimulated by photo-thermal elastic energy conversion using quartz tuning forks. Opt Quant Electron 56, 69 (2024). https://doi.org/10.1007/s11082-023-05673-0

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  • DOI: https://doi.org/10.1007/s11082-023-05673-0

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