A compact polymer optical fibre ultrasound detector

Broadway, Christian, Gallego, Daniel, Pospori, Andreas, Zubel, Michal, Webb, David J., Sugden, Kate, Carpintero, Guillermo and Lamela, Horacio (2016). A compact polymer optical fibre ultrasound detector. IN: Photons Plus Ultrasound: Imaging and Sensing 2016. Oraevsky, Alexander A. and Wang, Lihong V. (eds) SPIE Proceedings . USA: SPIE.

Abstract

Polymer optical fibre (POF) is a relatively new and novel technology that presents an innovative approach for ultrasonic endoscopic applications. Currently, piezo electric transducers are the typical detectors of choice, albeit possessing a limited bandwidth due to their resonant nature and a sensitivity that decreases proportionally to their size. Optical fibres provide immunity from electromagnetic interference and POF in particular boasts more suitable physical characteristics than silica optical fibre. The most important of these are lower acoustic impedance, a reduced Young's Modulus and a higher acoustic sensitivity than single-mode silica fibre at both 1 MHz and 10 MHz. POF therefore offers an interesting alternative to existing technology. Intrinsic fibre structures such as Bragg gratings and Fabry-Perot cavities may be inscribed into the fibre core using UV lasers. These gratings are a modulation of the refractive index of the fibre core and provide the advantages of high reflectivity, customisable bandwidth and point detection. We present a compact in fibre ultrasonic point detector based upon a POF Bragg grating (POFBG) sensor. We demonstrate that the detector is capable of leaving a laboratory environment by using connectorised fibre sensors and make a case for endoscopic ultrasonic detection through use of a mounting structure that better mimics the environment of an endoscopic probe. We measure the effects of water immersion upon POFBGs and analyse the ultrasonic response for 1, 5 and 10 MHz.

Publication DOI: https://doi.org/10.1117/12.2212420
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Christian Broadway; Daniel Gallego; Andreas Pospori; Michal Zubel; David J. Webb; Kate Sugden; Guillermo Carpintero and Horacio Lamela, "A compact polymer optical fibre ultrasound detector", Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 970813 (March 15, 2016). Copyright 2016. Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic 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/10.1117/12.2212420
Event Title: Photons Plus Ultrasound: Imaging and Sensing 2016
Event Type: Other
Event Dates: 2016-02-14 - 2016-02-17
Uncontrolled Keywords: biomedical applications,endoscopy,fibre sensors,polymer optical fibre,polymer optical fibre sensors,ultrasound,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biomaterials,Radiology Nuclear Medicine and imaging
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://proceedi ... ticleid=2504702 (Publisher URL)
Published Date: 2016-03-15
Authors: Broadway, Christian
Gallego, Daniel
Pospori, Andreas
Zubel, Michal
Webb, David J. ( 0000-0002-5495-1296)
Sugden, Kate ( 0000-0001-6323-1082)
Carpintero, Guillermo
Lamela, Horacio

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