Microstructured polymer optical fibre sensors for opto-acoustic endoscopy


Opto-acoustic imaging is a growing field of research in recent years, providing functional imaging of physiological biomarkers, such as the oxygenation of haemoglobin. Piezo electric transducers are the industry standard detector for ultrasonics, but their limited bandwidth, susceptibility to electromagnetic interference and their inversely proportional sensitivity to size all affect the detector performance. Sensors based on polymer optical fibres (POF) are immune to electromagnetic interference, have lower acoustic impedance and a reduced Young's Modulus compared to silica fibres. Furthermore, POF enables the possibility of a wideband sensor and a size appropriate to endoscopy. Micro-structured POF (mPOF) used in an interferometric detector has been shown to be an order of magnitude more sensitive than silica fibre at 1 MHz and 3 times more sensitive at 10 MHz. We present the first opto-acoustic measurements obtained using a 4.7mm PMMA mPOF Bragg grating with a fibre diameter of 130 μm and present the lateral directivity pattern of a PMMA mPOF FBG ultrasound sensor over a frequency range of 1-50 MHz. We discuss the impact of the pattern with respect to the targeted application and draw conclusions on how to mitigate the problems encountered.

Divisions: College of Engineering & Physical Sciences > School of Computer Science and Digital Technologies > Electronics & Computer Engineering
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: -Christian Broadway; Daniel Gallego; Andreas Pospori; Michal Zube ; David J. Webb; Kate Sugden; Guillermo Carpintero and Horacio Lamela; "Microstructured polymer optical fibre sensors for opto-acoustic endoscopy", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98860S (April 27, 2016) Copyright 2016. Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI: http://dx.doi.org/10.1117/12.2227588
Event Title: Micro-Structured and Specialty Optical Fibres IV
Event Type: Other
Event Dates: 2016-04-04 - 2016-04-06
ISBN: 978-1-5106-0131-4
Last Modified: 29 Nov 2023 13:57
Date Deposited: 26 Oct 2016 11:15
Full Text Link: http://proceedi ... ticleid=2519506
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Conference contribution
Published Date: 2016-04-27
Accepted Date: 2016-03-01
Authors: Broadway, Christian
Gallego, Daniel
Pospori, Andreas
Zubel, Michal
Webb, David J.
Sugden, Kate
Carpintero, Guillermo
Lamela, Horacio



Version: Published Version

Export / Share Citation


Additional statistics for this record