
Proceedings Paper
Characteristics of optimized fibre-optic ultrasound receivers for minimally invasive photoacoustic detectionFormat | Member Price | Non-Member Price |
---|---|---|
$17.00 | $21.00 |
Paper Abstract
A range of miniature (125μm o.d.) fibre optic ultrasound sensors based on the use of interferometric polymer optical
cavities has been developed for minimally invasive photoacoustic imaging and sensing applications. It was observed that
by careful selection of both the fibre tip and cavity geometry it is possible to achieve exceptional acoustic performance.
Specifically, rounding the tip of the fibre to remove the presence of sharp diffractive boundaries enables a well behaved
frequency response along with a near omnidirectional response at frequencies in the tens of MHz range to be achieved.
The use of a plano-convex rather than a planar cavity provides high finesse and therefore detection sensitivity. Thus, by
using a plano-convex cavity formed at the tip of radiused single mode fibre it was possible to realise a miniature ultrasound
detector with a bandwidth of 80MHz, a noise-equivalent pressure of 40Pa (over a 20MHz measurement bandwidth) and a
near omnidirectional response at frequencies as high as 30MHz. These characteristics suggest this type of sensor could
find applications in interventional medicine for guiding needles or catheters, as mechanically scanned photoacoustic
imaging probes or in laser scanning OR-PAM.
Paper Details
Date Published: 11 March 2015
PDF: 9 pages
Proc. SPIE 9323, Photons Plus Ultrasound: Imaging and Sensing 2015, 932311 (11 March 2015); doi: 10.1117/12.2081904
Published in SPIE Proceedings Vol. 9323:
Photons Plus Ultrasound: Imaging and Sensing 2015
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)
PDF: 9 pages
Proc. SPIE 9323, Photons Plus Ultrasound: Imaging and Sensing 2015, 932311 (11 March 2015); doi: 10.1117/12.2081904
Show Author Affiliations
Edward Z. Zhang, Univ. College London (United Kingdom)
Paul C. Beard, Univ. College London (United Kingdom)
Published in SPIE Proceedings Vol. 9323:
Photons Plus Ultrasound: Imaging and Sensing 2015
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)
© SPIE. Terms of Use
