A multiplexed FBG based sensor platform for flow and temperature measurements in the Baltic Sea

A. Dzipalski, J. A. S. Morton, N. Papachristou, R. R. J. Maier, W. N. MacPherson, A. Ristolainen, M. Kruusmaa, E. Reilent, B. J. Wolf, P. Pirih, S. M. van Netten, I. Shuhova, U. Lips, N. McFarlane, R. Macleod, M. Hendry, J. Sheehy, M. Almoghayer, N. Rojas, Gareth DaviesA. Hakim, A. Ng

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

1 Citation (Scopus)
34 Downloads (Pure)


In this paper a multiplexed multi-parameter marinized sensory array is described. This was deployed on the continental slope off the Keri Island marine observatory in the Gulf of Finland (Estonia). The sensor array is made up of 4 measurement stations which are connected in series. Across these measurement stations, a total of 16 temperature sensors, 4 attitude sensors (each consisting of 3 individual fiber sensors) and 16 flow sensors were successfully deployed. They were addressed over 1.1 km via 20 single-mode (SMF-28e) optical fibers contained in a single marine compliant ruggedized umbilical. The bio-inspired fiber optic flow sensors are designed to mimic the behavior of the superficial neuromasts naturally found as part of the lateral line sensory organ present in fish. The sensor is composed of optical fibers inscribed with Fiber Bragg Gratings glued together in a polymer matrix which are then encapsulated in a polyurethane shell. The sensors response has been tested in DC flows in a tow tank and have demonstrated the ability of measuring flow speed from 0.05 ms-1 to 2.5 ms-1. The main aim of the deployment was to demonstrate the capabilities of fiber sensor technology for long-term oceanographic applications. The measurement period described lasted over two months and the sensor system performed well in comparison with data was gathered from commercial instrumentation available.

Original languageEnglish
Title of host publicationEuropean Workshop on Optical Fibre Sensors (EWOFS 2023)
EditorsMarc Wuilpart, Christophe Caucheteur
ISBN (Electronic)9781510665019
ISBN (Print)9781510665002
Publication statusPublished - 23 May 2023
Event2023 European Workshop on Optical Fibre Sensors - Mons, Belgium
Duration: 23 May 202326 May 2023

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


Conference2023 European Workshop on Optical Fibre Sensors
Abbreviated titleEWOFS 2023


  • Environmental sensing
  • Fiber Bragg Grating
  • Flow sensing
  • Multiplexing

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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