3D shape sensing medical needle based on the multiplexing of optical backscattering reflectometry

Carlo Molardi, Aizhan Issatayeva, Aidana Beisenova, Wilfried Blanc, Daniele Tosi

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


Optical Backscattering Reflectometry (OBR) can be used for one-dimensional distributed strain sensing of medical needles. To achieve 3D shape sensing the needle should be equipped with multiple optical fibers. A feasible configuration can be done using two pairs of parallel optical fibers, which will measure the strain in two directions perpendicular to a needle axis. However, OBR is limited to a single fiber sensing because of its inability to discriminate scattering patterns of different fibers. To achieve multiplexing, it is proposed to use nanoparticle doped fibers (NP-doped) with high scattering power and splice them to standard single-mode (SMF) pigtails with different lengths. As a result of such configuration, the NP-doped fibers, which are used as sensing fibers, are spatially separated by standard fibers.

Original languageEnglish
Title of host publicationAdvanced Sensor Systems and Applications IX
EditorsTiegen Liu, Gang-Ding Peng, Zuyuan He
ISBN (Electronic)9781510630994
Publication statusPublished - Jan 1 2019
EventAdvanced Sensor Systems and Applications IX 2019 - Hangzhou, China
Duration: Oct 21 2019Oct 22 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceAdvanced Sensor Systems and Applications IX 2019


  • 3D shape sensing
  • Multiplexing setup
  • Nanoparticles doped fibers
  • Optical Backscattering Reflectometry
  • Optical fibers
  • Strain sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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