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Publication Detail
On the intuitive understanding of interrogating Fabry-Perot etalon with a focused beam
  • Publication Type:
  • Authors:
    Marques DM, Guggenheim JA, Ansari R, Zhang EZ, Beard PC, Munro PRT
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  • Publication date:
  • Published proceedings:
    Progress in Biomedical Optics and Imaging - Proceedings of SPIE
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  • ISBN-13:
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  • Name of conference:
    SPIE BiOS, 2019
  • Conference place:
    San Francisco, California, United States
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© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. Polymer film Fabry-Perot (FP) sensors are commonly used to detect ultrasound for Photoacoustic (PA) imaging providing high resolution 3D images. Such high image quality is possible due to their low Noise Equivalent Pressure (NEP) because of their broadband response and small acoustic element size. The acoustic element size is small (<100 μm) as defined, to first approximation, by the spot size of the focused interrogation beam. However, it has been difficult until now to gain an accurate intuitive understanding of the working principle of FP sensors interrogated with a focused beam. To overcome this limitation a highly realistic rigorous model of the FP sensor's optical response has used to establish a new intuitive understanding. The origin of fringe depth reduction and asymmetry associated with the FP sensors optical response is explained using the model developed.
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