The method for acoustic pressure calibration based on fiber Bragg grating

Haoyu Zhou; Yi Wu; Yuliang Wu

doi:10.1117/12.3052626

18 November 2024 The method for acoustic pressure calibration based on fiber Bragg grating

Haoyu Zhou, Yi Wu, Yuliang Wu

Author Affiliations +

Proceedings Volume 13417, International Conference on Precision Instruments and Optical Engineering (PIOE 2024); 134170J (2024) https://doi.org/10.1117/12.3052626
Event: 4th International Conference on Precision Instruments and Optical Engineering (PIOE 2024), 2024, Kuala Lumpur, Malaysia

Abstract

All-fiber photoacoustic sensing, characterized by its compact size and ease of integration, has significant potential in applications such as non-destructive testing and structural health monitoring. Traditional calibration of photoacoustic transducers relies on high-frequency hydrophones, which are limited to liquid environments, posing challenges for realtime calibration in air. This study introduces a novel method for photoacoustic pressure calibration based on fiber Bragg gratings (FBGs), which are well-known for their high sensitivity and wavelength division multiplexing capabilities. We establish a theoretical model linking photoacoustic pressure, FBG reflection spectra, and photodetector responsivity. By constructing an FBG-based photoacoustic pressure calibration system, we validate its performance against a standard highfrequency hydrophone (PA FOHS, England), achieving a calibration error of just 0.6%. Unlike conventional hydrophonebased methods, this approach allows for calibration in non-liquid environments, expanding its applicability. We anticipate that this method will advance the use of all-fiber photoacoustic technology in various fields, including non-destructive testing and structural health monitoring.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Haoyu Zhou, Yi Wu, and Yuliang Wu "The method for acoustic pressure calibration based on fiber Bragg grating", Proc. SPIE 13417, International Conference on Precision Instruments and Optical Engineering (PIOE 2024), 134170J (18 November 2024); https://doi.org/10.1117/12.3052626

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KEYWORDS

Photoacoustic spectroscopy

Fiber Bragg gratings

Calibration

Acoustics

Ultrasonography

Photodetectors

Nondestructive evaluation

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