Frequency Domain Analysis of Laser and Acoustic Pressure Parameters in Photoacoustic Wave Equation for Acoustic Pressure Sensor Designs


Tabaru T. E. , Hayber Ş. E. , SARAÇOĞLU Ö. G.

CURRENT OPTICS AND PHOTONICS, vol.2, no.3, pp.250-260, 2018 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2 Issue: 3
  • Publication Date: 2018
  • Doi Number: 10.3807/copp.2018.2.3.250
  • Journal Name: CURRENT OPTICS AND PHOTONICS
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.250-260
  • Keywords: Pulsed laser photoacoustic method, Acoustic pressure sensor, Fourier transform, Frequency domain solution, Photoacoustic wave equation, ULTRASOUND, TOMOGRAPHY, AMPLITUDE

Abstract

A pressure wave created by the photoacoustic effect is affected by the medium and by laser parameters. The effect of these parameters on the generated pressure wave can be seen by solving the photoacoustic wave equation. These solutions which are examined in the time domain and the frequency domain should be considered by researchers in acoustic sensor design. In particular, frequency domain analysis contains significant information for designing the sensor. The most important part of this information is the determination of the operating frequency of the sensor. In this work, the laser parameters to excite the medium, and the acoustic signal parameters created by the medium are analyzed. For the first time, we have obtained solutions for situations which have no frequency domain solutions in the literature. The main focal point in this work is that the frequency domain solutions of the acoustic wave equation are performed and the effects of the frequency analysis of the related parameters are shown comparatively from the viewpoint of using them in acoustic sensor designs.