On the intuitive understanding of interrogating Fabry-Perot etalon with a focused beam

Dylan M. Marques; James A. Guggenheim; Rehman Ansari; Edward Z. Zhang; Paul C. Beard; Peter R. T. Munro

doi:10.1117/12.2508413

27 February 2019 On the intuitive understanding of interrogating Fabry-Perot etalon with a focused beam

Dylan M. Marques, James A. Guggenheim, Rehman Ansari, Edward Z. Zhang, Paul C. Beard, Peter R. T. Munro

Proceedings Volume 10878, Photons Plus Ultrasound: Imaging and Sensing 2019; 108780Q (2019) https://doi.org/10.1117/12.2508413
Event: SPIE BiOS, 2019, San Francisco, California, United States

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

Citation Download Citation

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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