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27 February 2019 On the intuitive understanding of interrogating Fabry-Perot etalon with a focused beam
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Abstract
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.
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dylan M. Marques, James A. Guggenheim, Rehman Ansari, Edward Z. Zhang, Paul C. Beard, and Peter R. T. Munro "On the intuitive understanding of interrogating Fabry-Perot etalon with a focused beam", Proc. SPIE 10878, Photons Plus Ultrasound: Imaging and Sensing 2019, 108780Q (27 February 2019); https://doi.org/10.1117/12.2508413
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