A compact polymer optical fibre ultrasound detector

Christian Broadway, Daniel Gallego, Andreas Pospori, Michal Zubel, David J. Webb, Kate Sugden, Guillermo Carpintero, Horacio Lamela

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish
Title of host publicationPhotons Plus Ultrasound: Imaging and Sensing 2016
EditorsAlexander A. Oraevsky, Lihong V. Wang
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages7
ISBN (Print)978-1-6284-1942-9
DOIs
Publication statusPublished - 15 Mar 2016
EventPhotons Plus Ultrasound: Imaging and Sensing 2016 - San Francisco, United States
Duration: 14 Feb 201617 Feb 2016

Publication series

NameSPIE Proceedings
PublisherSPIE
Volume9737
ISSN (Print)0277-786X
ISSN (Electronic)2410-9045

Conference

ConferencePhotons Plus Ultrasound: Imaging and Sensing 2016
CountryUnited States
CitySan Francisco
Period14/02/1617/02/16

Bibliographical note

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

Keywords

  • biomedical applications
  • endoscopy
  • fibre sensors
  • polymer optical fibre
  • polymer optical fibre sensors
  • ultrasound

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  • Cite this

    Broadway, C., Gallego, D., Pospori, A., Zubel, M., Webb, D. J., Sugden, K., Carpintero, G., & Lamela, H. (2016). A compact polymer optical fibre ultrasound detector. In A. A. Oraevsky, & L. V. Wang (Eds.), Photons Plus Ultrasound: Imaging and Sensing 2016 [970813] (SPIE Proceedings; Vol. 9737). SPIE. https://doi.org/10.1117/12.2212420