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Proceedings Paper

Highly sensitive optical microresonator sensors for photoacoustic imaging
Author(s): Jing Li; Alaric Taylor; Ioannis Papakonstantinou; Edward Zhang; Paul Beard
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Paper Abstract

We present novel concave Fabry Perot (FP) sensor arrays for photoacoustic imaging which were fabricated using a high-precision inkjet printing approach to produce the cavity and employed physical vapor deposition to form the dielectric mirrors. Our concave FP cavity design provides excellent beam confinement within the cavity enabling high finesse and thus high sensitivity to be achieved. Two such concave sensors are evaluated in terms of their sensitivity and acoustic bandwidth. A 66 μm thick concave sensor is shown to provide a noise equivalent pressure (NEP) of 85 Pa and an acoustic bandwidth of 16 MHz, and can potentially be used as a sensitive broadband sensor for superficial imaging. A 250 μm thick sensor with an NEP of 12 Pa and acoustic bandwidth of 4 MHz was also developed for deep tissue imaging applications.

Paper Details

Date Published:
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Proc. SPIE 8943, Photons Plus Ultrasound: Imaging and Sensing 2014, 894355; doi: 10.1117/12.2039879
Show Author Affiliations
Jing Li, Univ. College London (United Kingdom)
Alaric Taylor, Univ. College London (United Kingdom)
Ioannis Papakonstantinou, Univ. College London (United Kingdom)
Edward Zhang, Univ. College London (United Kingdom)
Paul Beard, Univ. College London (United Kingdom)


Published in SPIE Proceedings Vol. 8943:
Photons Plus Ultrasound: Imaging and Sensing 2014
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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