Marques, DM;
Guggenheim, JA;
Ansari, R;
Zhang, EZ;
Beard, PC;
Munro, PRT;
(2019)
On the intuitive understanding of interrogating Fabry-Perot etalon with a focused beam.
In:
Photons Plus Ultrasound: Imaging and Sensing 2019.
(pp. 108780Q-108780Q).
SPIE
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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.
| Type: | Proceedings paper |
|---|---|
| Title: | On the intuitive understanding of interrogating Fabry-Perot etalon with a focused beam |
| Event: | SPIE BiOS, 2019, San Francisco, California, United States |
| ISBN-13: | 9781510623989 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2508413 |
| Publisher version: | https://doi.org/ 10.1117/12.2508413 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Fabry–Perot interferometers, Sensors, Mirrors, Wave propagation, Beam propagation method, Photoacoustic imaging, Signal detection |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10074988 |
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